How to debug in webflux?

How to debug in webflux? - spring-boot

I use Spring Boot 2.1.1.RELEASE with webflux.
Dependencies are like below:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
Here goes the Controller, I use Hooks.onOperatorDebug(); as reactor's document says it Can open debug mode.
#RestController
public class TestController {
#GetMapping("/test")
public Mono test(String a) {
Hooks.onOperatorDebug();
return Mono.just("test1")
.map(t -> t + "test2")
.zipWith(Mono.error(() -> new IllegalArgumentException("error")));
}
#PostMapping("/test")
public Mono post(#RequestBody Req req) {
return Mono.just(req);
}
}
class Req {
private String a;
private String b;
public String getA() {
return a;
}
public void setA(String a) {
this.a = a;
}
public String getB() {
return b;
}
public void setB(String b) {
this.b = b;
}
}
log level is below:
logging:
level:
root: trace
When I call <http://localhost:8080/test> , I Can only get logs like below:
2018-12-10 21:41:17.001 DEBUG 31340 --- [ctor-http-nio-2] r.n.http.server.HttpServerOperations : [id: 0x7cc865b4, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:52638] Increasing pending responses, now 1
2018-12-10 21:41:17.001 DEBUG 31340 --- [ctor-http-nio-2] reactor.netty.http.server.HttpServer : [id: 0x7cc865b4, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:52638] Handler is being applied: org.springframework.http.server.reactive.ReactorHttpHandlerAdapter#3a0ad630
2018-12-10 21:41:17.002 TRACE 31340 --- [ctor-http-nio-2] o.s.w.s.adapter.HttpWebHandlerAdapter : [7cc865b4] HTTP GET "/test?a=b", headers={masked}
2018-12-10 21:41:17.002 TRACE 31340 --- [ctor-http-nio-2] o.s.b.f.s.DefaultListableBeanFactory : Returning cached instance of singleton bean 'testController'
2018-12-10 21:41:17.002 DEBUG 31340 --- [ctor-http-nio-2] s.w.r.r.m.a.RequestMappingHandlerMapping : [7cc865b4] Mapped to public reactor.core.publisher.Mono com.itmuch.webfluxtest.TestController.test(java.lang.String)
2018-12-10 21:41:17.003 DEBUG 31340 --- [ctor-http-nio-2] reactor.core.publisher.Hooks : Enabling stacktrace debugging via onOperatorDebug
2018-12-10 21:41:17.003 DEBUG 31340 --- [ctor-http-nio-2] reactor.core.publisher.Hooks : Hooking onEachOperator: onOperatorDebug
2018-12-10 21:41:17.003 DEBUG 31340 --- [ctor-http-nio-2] o.s.w.r.r.m.a.ResponseBodyResultHandler : Using 'application/json;charset=UTF-8;q=0.8' given [text/html, application/xhtml+xml, image/webp, image/apng, application/xml;q=0.9, */*;q=0.8] and supported [application/json;charset=UTF-8, application/*+json;charset=UTF-8, text/event-stream]
2018-12-10 21:41:17.003 DEBUG 31340 --- [ctor-http-nio-2] o.s.w.r.r.m.a.ResponseBodyResultHandler : [7cc865b4] 0..1 [?]
2018-12-10 21:41:17.008 TRACE 31340 --- [ctor-http-nio-2] o.s.w.r.function.server.RouterFunctions : [7cc865b4] Matched org.springframework.boot.autoconfigure.web.reactive.error.DefaultErrorWebExceptionHandler$$Lambda$520/509612428#4c3d17a7
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'server.ports'
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'configurationProperties'
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'systemProperties'
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'systemEnvironment'
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'random'
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'applicationConfig: [classpath:/application.yml]'
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Could not find key 'spring.template.provider.cache' in any property source
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'server.ports'
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'configurationProperties'
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'systemProperties'
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'systemEnvironment'
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'random'
2018-12-10 21:41:17.009 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'applicationConfig: [classpath:/application.yml]'
2018-12-10 21:41:17.010 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Could not find key 'spring.template.provider.cache' in any property source
2018-12-10 21:41:17.010 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'server.ports'
2018-12-10 21:41:17.010 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'configurationProperties'
2018-12-10 21:41:17.010 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'systemProperties'
2018-12-10 21:41:17.010 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'systemEnvironment'
2018-12-10 21:41:17.010 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'random'
2018-12-10 21:41:17.010 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Searching for key 'spring.template.provider.cache' in PropertySource 'applicationConfig: [classpath:/application.yml]'
2018-12-10 21:41:17.010 TRACE 31340 --- [ctor-http-nio-2] o.s.c.e.PropertySourcesPropertyResolver : Could not find key 'spring.template.provider.cache' in any property source
2018-12-10 21:41:17.010 DEBUG 31340 --- [ctor-http-nio-2] .a.w.r.e.DefaultErrorWebExceptionHandler : [7cc865b4] Resolved [IllegalArgumentException: error] for HTTP GET /test
2018-12-10 21:41:17.011 TRACE 31340 --- [ctor-http-nio-2] o.s.core.codec.CharSequenceEncoder : [7cc865b4] Writing "<html><body><h1>Whitelabel Error Page</h1><p>This application has no configured error view, so you are seeing this as a fallback.</p><div id='created'>Mon Dec 10 21:41:17 CST 2018</div><div>There was an unexpected error (type=Internal Server Error, status=500).</div><div>error</div></body></html>"
2018-12-10 21:41:17.011 DEBUG 31340 --- [ctor-http-nio-2] r.n.channel.ChannelOperationsHandler : [id: 0x7cc865b4, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:52638] Writing object DefaultHttpResponse(decodeResult: success, version: HTTP/1.1)
HTTP/1.1 500 Internal Server Error
Content-Type: text/html
Content-Length: 297
2018-12-10 21:41:17.011 DEBUG 31340 --- [ctor-http-nio-2] r.n.channel.ChannelOperationsHandler : [id: 0x7cc865b4, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:52638] Writing object
2018-12-10 21:41:17.011 TRACE 31340 --- [ctor-http-nio-2] r.n.channel.ChannelOperationsHandler : [id: 0x7cc865b4, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:52638] Pending write size = 297
2018-12-10 21:41:17.012 TRACE 31340 --- [ctor-http-nio-2] o.s.w.s.adapter.HttpWebHandlerAdapter : [7cc865b4] Completed 500 INTERNAL_SERVER_ERROR, headers={masked}
2018-12-10 21:41:17.012 TRACE 31340 --- [ctor-http-nio-2] o.s.h.s.r.ReactorHttpHandlerAdapter : [7cc865b4] Handling completed
2018-12-10 21:41:17.012 DEBUG 31340 --- [ctor-http-nio-2] r.n.http.server.HttpServerOperations : [id: 0x7cc865b4, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:52638] Last HTTP response frame
2018-12-10 21:41:17.012 DEBUG 31340 --- [ctor-http-nio-2] r.n.channel.ChannelOperationsHandler : [id: 0x7cc865b4, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:52638] Writing object EmptyLastHttpContent
2018-12-10 21:41:17.012 DEBUG 31340 --- [ctor-http-nio-2] r.n.http.server.HttpServerOperations : [id: 0x7cc865b4, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:52638] Decreasing pending responses, now 0
2018-12-10 21:41:17.013 TRACE 31340 --- [ctor-http-nio-2] reactor.netty.channel.ChannelOperations : [id: 0x7cc865b4, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:52638] Disposing ChannelOperation from a channel
java.lang.Exception: ChannelOperation terminal stack
at reactor.netty.channel.ChannelOperations.terminate(ChannelOperations.java:363) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at reactor.netty.http.server.HttpServerOperations.cleanHandlerTerminate(HttpServerOperations.java:509) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at reactor.netty.http.server.HttpTrafficHandler.operationComplete(HttpTrafficHandler.java:297) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at reactor.netty.http.server.HttpTrafficHandler.operationComplete(HttpTrafficHandler.java:54) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:511) [netty-common-4.1.31.Final.jar:4.1.31.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:485) [netty-common-4.1.31.Final.jar:4.1.31.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:424) [netty-common-4.1.31.Final.jar:4.1.31.Final]
at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:103) [netty-common-4.1.31.Final.jar:4.1.31.Final]
at io.netty.util.internal.PromiseNotificationUtil.trySuccess(PromiseNotificationUtil.java:48) [netty-common-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.ChannelOutboundBuffer.safeSuccess(ChannelOutboundBuffer.java:696) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.ChannelOutboundBuffer.remove(ChannelOutboundBuffer.java:258) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.nio.AbstractNioByteChannel.doWriteInternal(AbstractNioByteChannel.java:216) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.nio.AbstractNioByteChannel.doWrite0(AbstractNioByteChannel.java:209) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.socket.nio.NioSocketChannel.doWrite(NioSocketChannel.java:397) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.flush0(AbstractChannel.java:934) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.flush0(AbstractNioChannel.java:360) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.flush(AbstractChannel.java:901) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.flush(DefaultChannelPipeline.java:1396) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeFlush0(AbstractChannelHandlerContext.java:776) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeFlush(AbstractChannelHandlerContext.java:768) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.flush(AbstractChannelHandlerContext.java:749) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.flush(CombinedChannelDuplexHandler.java:533) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.ChannelOutboundHandlerAdapter.flush(ChannelOutboundHandlerAdapter.java:115) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.CombinedChannelDuplexHandler.flush(CombinedChannelDuplexHandler.java:358) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeFlush0(AbstractChannelHandlerContext.java:776) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeFlush(AbstractChannelHandlerContext.java:768) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.flush(AbstractChannelHandlerContext.java:749) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.ChannelDuplexHandler.flush(ChannelDuplexHandler.java:117) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeFlush0(AbstractChannelHandlerContext.java:776) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeFlush(AbstractChannelHandlerContext.java:768) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.flush(AbstractChannelHandlerContext.java:749) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at reactor.netty.channel.ChannelOperationsHandler.doWrite(ChannelOperationsHandler.java:283) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at reactor.netty.channel.ChannelOperationsHandler.drain(ChannelOperationsHandler.java:465) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at reactor.netty.channel.ChannelOperationsHandler.flush(ChannelOperationsHandler.java:194) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at io.netty.channel.AbstractChannelHandlerContext.invokeFlush0(AbstractChannelHandlerContext.java:776) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:802) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:814) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:794) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:837) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1071) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:300) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at reactor.netty.http.server.HttpServerOperations.onOutboundComplete(HttpServerOperations.java:487) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at reactor.netty.channel.ChannelOperations.onComplete(ChannelOperations.java:191) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onComplete(FluxOnAssembly.java:383) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onComplete(MonoPeekTerminal.java:321) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onComplete(FluxOnAssembly.java:383) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableConditionalSubscriber.onComplete(FluxPeekFuseable.java:578) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onComplete(FluxOnAssembly.java:383) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.Operators$MonoSubscriber.onComplete(Operators.java:1516) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoIgnoreThen$ThenAcceptInner.onComplete(MonoIgnoreThen.java:314) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onComplete(FluxOnAssembly.java:383) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.Operators.complete(Operators.java:131) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoEmpty.subscribe(MonoEmpty.java:45) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoOnAssembly.subscribe(MonoOnAssembly.java:76) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:153) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoOnAssembly.subscribe(MonoOnAssembly.java:71) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:70) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoOnAssembly.subscribe(MonoOnAssembly.java:71) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoPeekTerminal.subscribe(MonoPeekTerminal.java:61) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.core.publisher.MonoOnAssembly.subscribe(MonoOnAssembly.java:76) [reactor-core-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at reactor.netty.http.server.HttpServerHandle.onStateChange(HttpServerHandle.java:64) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at reactor.netty.tcp.TcpServerBind$ChildObserver.onStateChange(TcpServerBind.java:226) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:434) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:141) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:159) [reactor-netty-0.8.3.RELEASE.jar:0.8.3.RELEASE]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:438) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:323) [netty-codec-4.1.31.Final.jar:4.1.31.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:297) [netty-codec-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:253) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:648) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:583) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:500) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:462) [netty-transport-4.1.31.Final.jar:4.1.31.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:897) [netty-common-4.1.31.Final.jar:4.1.31.Final]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_192]
2018-12-10 21:41:17.013 DEBUG 31340 --- [ctor-http-nio-2] r.n.channel.ChannelOperationsHandler : [id: 0x7cc865b4, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:52638] No ChannelOperation attached. Dropping: EmptyLastHttpContent
The reactor's debug mode is not been actived.
So I wonder How to debug in spring webflux?Or is there anyway help us find errors in our code quickly?

In reactor, Hooks.onOperatorDebug() instruments the Reactor operators to collect more information about the current stack during the execution. This has a performance cost, and should not be done in production. This is a static call that needs to be done only once per JVM execution, so no need to repeat it for every controller call. With Spring Boot, this is done automatically for you is you have the spring-boot-devtools dependency on classpath.
Since Spring Boot 2.1, you can get better logs for web-related operations by setting to DEBUG the web logging group, so logging.level.web=debug. This will log useful information about web requests processing.
In your case, you seem also to be missing information about the execution of the Reactor pipeline. In this case, you should add log() operators in your pipeline to understand what signals are going through your pipeline.
In this particular code snippet, I'm seeing several things:
the String a method parameter seems odd since it's not coupled with an annotation that fetches data from the incoming request such as #RequestParam
the Mono.zipWith(Mono) operator doesn't make sense here; the result will always be an error signal with an IllegalArgumentException. So it is expected for the Spring Boot error handling to process that exception and render an HTML error page

Related

I am getting a lot of errors in Spring Boot framework

Here's the error I am getting :
:: Spring Boot :: (v2.4.3)
2021-04-11 23:44:53.501 INFO 7012 --- [ restartedMain] com.example.demo.LibraryApplication : Starting LibraryApplication using Java 15.0.2 on LAPTOP-SL7RT9CR with PID 7012 (C:\Users\LINDANI\Library\target\classes started by LINDANI in C:\Users\LINDANI\Library)
2021-04-11 23:44:53.506 INFO 7012 --- [ restartedMain] com.example.demo.LibraryApplication : No active profile set, falling back to default profiles: default
2021-04-11 23:44:53.506 DEBUG 7012 --- [ restartedMain] o.s.boot.SpringApplication : Loading source class com.example.demo.LibraryApplication
2021-04-11 23:44:54.050 DEBUG 7012 --- [ restartedMain] o.s.b.devtools.restart.ChangeableUrls : Matching URLs for reloading : [file:/C:/Users/LINDANI/Library/target/classes/]
2021-04-11 23:44:54.050 DEBUG 7012 --- [ restartedMain] o.s.b.d.settings.DevToolsSettings : Included patterns for restart : []
2021-04-11 23:44:54.050 DEBUG 7012 --- [ restartedMain] o.s.b.d.settings.DevToolsSettings : Excluded patterns for restart : [/spring-boot-starter-[\w-]+/, /spring-boot/(bin|build|out)/, /spring-boot-starter/(bin|build|out)/, /spring-boot-devtools/(bin|build|out)/, /spring-boot-actuator/(bin|build|out)/, /spring-boot-autoconfigure/(bin|build|out)/]
2021-04-11 23:44:54.050 INFO 7012 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2021-04-11 23:44:54.050 INFO 7012 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2021-04-11 23:44:54.050 DEBUG 7012 --- [ restartedMain] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext#b77404b
2021-04-11 23:44:57.930 INFO 7012 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2021-04-11 23:44:58.142 INFO 7012 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 173 ms. Found 1 JPA repository interfaces.
2021-04-11 23:45:00.254 DEBUG 7012 --- [ restartedMain] .s.b.w.e.t.TomcatServletWebServerFactory : Code archive: C:\Users\LINDANI\.m2\repository\org\springframework\boot\spring-boot\2.4.3\spring-boot-2.4.3.jar
2021-04-11 23:45:00.254 DEBUG 7012 --- [ restartedMain] .s.b.w.e.t.TomcatServletWebServerFactory : Code archive: C:\Users\LINDANI\.m2\repository\org\springframework\boot\spring-boot\2.4.3\spring-boot-2.4.3.jar
2021-04-11 23:45:00.259 DEBUG 7012 --- [ restartedMain] .s.b.w.e.t.TomcatServletWebServerFactory : None of the document roots [src/main/webapp, public, static] point to a directory and will be ignored.
2021-04-11 23:45:00.537 INFO 7012 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-04-11 23:45:00.587 INFO 7012 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-04-11 23:45:00.587 INFO 7012 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.43]
2021-04-11 23:45:00.978 INFO 7012 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-04-11 23:45:00.980 DEBUG 7012 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Published root WebApplicationContext as ServletContext attribute with name [org.springframework.web.context.WebApplicationContext.ROOT]
2021-04-11 23:45:00.980 INFO 7012 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 6930 ms
2021-04-11 23:45:01.009 DEBUG 7012 --- [ restartedMain] o.s.b.w.s.ServletContextInitializerBeans : Mapping filters: characterEncodingFilter urls=[/*] order=-2147483648, formContentFilter urls=[/*] order=-9900, requestContextFilter urls=[/*] order=-105
2021-04-11 23:45:01.014 DEBUG 7012 --- [ restartedMain] o.s.b.w.s.ServletContextInitializerBeans : Mapping servlets: dispatcherServlet urls=[/]
2021-04-11 23:45:01.124 DEBUG 7012 --- [ restartedMain] o.s.b.w.s.f.OrderedRequestContextFilter : Filter 'requestContextFilter' configured for use
2021-04-11 23:45:01.124 DEBUG 7012 --- [ restartedMain] s.b.w.s.f.OrderedCharacterEncodingFilter : Filter 'characterEncodingFilter' configured for use
2021-04-11 23:45:01.124 DEBUG 7012 --- [ restartedMain] o.s.b.w.s.f.OrderedFormContentFilter : Filter 'formContentFilter' configured for use
2021-04-11 23:45:02.337 INFO 7012 --- [ restartedMain] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2021-04-11 23:45:02.694 INFO 7012 --- [ restartedMain] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.28.Final
2021-04-11 23:45:03.244 INFO 7012 --- [ restartedMain] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2021-04-11 23:45:03.539 INFO 7012 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2021-04-11 23:45:05.594 INFO 7012 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2021-04-11 23:45:05.636 INFO 7012 --- [ restartedMain] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect
2021-04-11 23:45:07.817 INFO 7012 --- [ restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2021-04-11 23:45:07.845 INFO 7012 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2021-04-11 23:45:07.875 DEBUG 7012 --- [ restartedMain] o.s.b.d.livereload.LiveReloadServer : Starting live reload server on port 35729
2021-04-11 23:45:07.875 INFO 7012 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2021-04-11 23:45:08.217 WARN 7012 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'bookserviceImp': Unsatisfied dependency expressed through field 'bookrepo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'bookrepo' defined in com.example.demo.repo.Bookrepo defined in #EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: interface com.example.demo.repo.Bookrepo
2021-04-11 23:45:08.217 INFO 7012 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2021-04-11 23:45:08.240 INFO 7012 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2021-04-11 23:45:08.260 INFO 7012 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
2021-04-11 23:45:08.265 INFO 7012 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2021-04-11 23:45:08.275 DEBUG 7012 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Creating new Restarter for thread Thread[main,5,main]
2021-04-11 23:45:08.275 DEBUG 7012 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Immediately restarting application
2021-04-11 23:45:08.275 DEBUG 7012 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Created RestartClassLoader org.springframework.boot.devtools.restart.classloader.RestartClassLoader#434a0335
2021-04-11 23:45:08.275 DEBUG 7012 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Starting application com.example.demo.LibraryApplication with URLs [file:/C:/Users/LINDANI/Library/target/classes/]
2021-04-11 23:45:08.407 ERROR 7012 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'bookserviceImp': Unsatisfied dependency expressed through field 'bookrepo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'bookrepo' defined in com.example.demo.repo.Bookrepo defined in #EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: interface com.example.demo.repo.Bookrepo
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:660) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1413) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:601) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:944) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:917) ~[spring-context-5.3.4.jar:5.3.4]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:582) ~[spring-context-5.3.4.jar:5.3.4]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.3.jar:2.4.3]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767) ~[spring-boot-2.4.3.jar:2.4.3]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) ~[spring-boot-2.4.3.jar:2.4.3]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426) ~[spring-boot-2.4.3.jar:2.4.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:326) ~[spring-boot-2.4.3.jar:2.4.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1311) ~[spring-boot-2.4.3.jar:2.4.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1300) ~[spring-boot-2.4.3.jar:2.4.3]
at com.example.demo.LibraryApplication.main(LibraryApplication.java:10) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.4.3.jar:2.4.3]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'bookrepo' defined in com.example.demo.repo.Bookrepo defined in #EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: interface com.example.demo.repo.Bookrepo
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1786) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:602) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:524) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1380) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1300) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:657) ~[spring-beans-5.3.4.jar:5.3.4]
... 26 common frames omitted
Caused by: java.lang.IllegalArgumentException: Not a managed type: interface com.example.demo.repo.Bookrepo
at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:582) ~[hibernate-core-5.4.28.Final.jar:5.4.28.Final]
at org.hibernate.metamodel.internal.MetamodelImpl.managedType(MetamodelImpl.java:85) ~[hibernate-core-5.4.28.Final.jar:5.4.28.Final]
at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.<init>(JpaMetamodelEntityInformation.java:75) ~[spring-data-jpa-2.4.5.jar:2.4.5]
at org.springframework.data.jpa.repository.support.JpaEntityInformationSupport.getEntityInformation(JpaEntityInformationSupport.java:66) ~[spring-data-jpa-2.4.5.jar:2.4.5]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getEntityInformation(JpaRepositoryFactory.java:229) ~[spring-data-jpa-2.4.5.jar:2.4.5]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:179) ~[spring-data-jpa-2.4.5.jar:2.4.5]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:162) ~[spring-data-jpa-2.4.5.jar:2.4.5]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactory.getTargetRepository(JpaRepositoryFactory.java:72) ~[spring-data-jpa-2.4.5.jar:2.4.5]
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:281) ~[spring-data-commons-2.4.5.jar:2.4.5]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:323) ~[spring-data-commons-2.4.5.jar:2.4.5]
at org.springframework.data.util.Lazy.getNullable(Lazy.java:230) ~[spring-data-commons-2.4.5.jar:2.4.5]
at org.springframework.data.util.Lazy.get(Lazy.java:114) ~[spring-data-commons-2.4.5.jar:2.4.5]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:329) ~[spring-data-commons-2.4.5.jar:2.4.5]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:144) ~[spring-data-jpa-2.4.5.jar:2.4.5]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1845) ~[spring-beans-5.3.4.jar:5.3.4]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1782) ~[spring-beans-5.3.4.jar:5.3.4]
... 36 common frames omitted
Process finished with exit code 0
Here's the pom file:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Library</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

Make sure Your Repository class is annotated with #Repository.
#Repository
public interface BookRepository extends JpaRepository<Book, Integer>{
}
Check your service implementation class and annotate with #Service annotation.
Use #Autowired while creating objects of repository class in the service implementation class.
#Service
public class BookServiceImplementation implements CommentService{
#Autowired
private BookRepository bookRepository;
}

Spring Boot Serving .jsp <jar>

Playing around trying to wrap my head around Spring Boot i cant make the jsp pages display. Have the daos etc working so no probs there but i cant for the life of me make it display a simple jsp page (no data passed in, just a simple page)
Have read so many things around the jsp limitations but didnt really understand what to do to bypass them.
If someone can help out with what i am missing here please.
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.wtf4j</groupId>
<artifactId>webapp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>webapp</name>
<description>WTF4J WebApp</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.10.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- For serving jsp pages -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
application.properties includes :
spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp
ProductController.java:
#Controller
public class ProductController {
#Autowired
ProductService productService;
#RequestMapping(name = "/newproduct")
public String write() {
return "index";
}
}
Main:
#SpringBootApplication
#EnableWebMvc
public class WebappApplication {
public static void main(String[] args) {
SpringApplication.run(WebappApplication.class, args);
}
}
Project Structure.
I have tried adding jsps in both /resources/META-INF/resources/WEB-INF/jsp as well as /webapp/WEB-INF/view
error
"C:\Program Files\Java\jdk1.8.0_151\bin\java" -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2017.1.4\lib\idea_rt.jar=65077:C:\Program Files\JetBrains\IntelliJ IDEA 2017.1.4\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_151\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_151\jre\lib\rt.jar;C:\Users\Alx\Desktop\webapp\target\classes;C:\Users\Alx\.m2\repository\org\springframework\boot\spring-boot-starter-data-jpa\1.5.10.RELEASE\spring-boot-starter-data-jpa-1.5.10.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\boot\spring-boot-starter\1.5.10.RELEASE\spring-boot-starter-1.5.10.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\boot\spring-boot\1.5.10.RELEASE\spring-boot-1.5.10.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\1.5.10.RELEASE\spring-boot-autoconfigure-1.5.10.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\boot\spring-boot-starter-logging\1.5.10.RELEASE\spring-boot-starter-logging-1.5.10.RELEASE.jar;C:\Users\Alx\.m2\repository\ch\qos\logback\logback-classic\1.1.11\logback-classic-1.1.11.jar;C:\Users\Alx\.m2\repository\ch\qos\logback\logback-core\1.1.11\logback-core-1.1.11.jar;C:\Users\Alx\.m2\repository\org\slf4j\jul-to-slf4j\1.7.25\jul-to-slf4j-1.7.25.jar;C:\Users\Alx\.m2\repository\org\slf4j\log4j-over-slf4j\1.7.25\log4j-over-slf4j-1.7.25.jar;C:\Users\Alx\.m2\repository\org\yaml\snakeyaml\1.17\snakeyaml-1.17.jar;C:\Users\Alx\.m2\repository\org\springframework\boot\spring-boot-starter-aop\1.5.10.RELEASE\spring-boot-starter-aop-1.5.10.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\spring-aop\4.3.14.RELEASE\spring-aop-4.3.14.RELEASE.jar;C:\Users\Alx\.m2\repository\org\aspectj\aspectjweaver\1.8.13\aspectjweaver-1.8.13.jar;C:\Users\Alx\.m2\repository\org\springframework\boot\spring-boot-starter-jdbc\1.5.10.RELEASE\spring-boot-starter-jdbc-1.5.10.RELEASE.jar;C:\Users\Alx\.m2\repository\org\apache\tomcat\tomcat-jdbc\8.5.27\tomcat-jdbc-8.5.27.jar;C:\Users\Alx\.m2\repository\org\apache\tomcat\tomcat-juli\8.5.27\tomcat-juli-8.5.27.jar;C:\Users\Alx\.m2\repository\org\springframework\spring-jdbc\4.3.14.RELEASE\spring-jdbc-4.3.14.RELEASE.jar;C:\Users\Alx\.m2\repository\org\hibernate\hibernate-core\5.0.12.Final\hibernate-core-5.0.12.Final.jar;C:\Users\Alx\.m2\repository\org\jboss\logging\jboss-logging\3.3.1.Final\jboss-logging-3.3.1.Final.jar;C:\Users\Alx\.m2\repository\org\hibernate\javax\persistence\hibernate-jpa-2.1-api\1.0.0.Final\hibernate-jpa-2.1-api-1.0.0.Final.jar;C:\Users\Alx\.m2\repository\org\javassist\javassist\3.21.0-GA\javassist-3.21.0-GA.jar;C:\Users\Alx\.m2\repository\antlr\antlr\2.7.7\antlr-2.7.7.jar;C:\Users\Alx\.m2\repository\org\jboss\jandex\2.0.0.Final\jandex-2.0.0.Final.jar;C:\Users\Alx\.m2\repository\dom4j\dom4j\1.6.1\dom4j-1.6.1.jar;C:\Users\Alx\.m2\repository\org\hibernate\common\hibernate-commons-annotations\5.0.1.Final\hibernate-commons-annotations-5.0.1.Final.jar;C:\Users\Alx\.m2\repository\org\hibernate\hibernate-entitymanager\5.0.12.Final\hibernate-entitymanager-5.0.12.Final.jar;C:\Users\Alx\.m2\repository\javax\transaction\javax.transaction-api\1.2\javax.transaction-api-1.2.jar;C:\Users\Alx\.m2\repository\org\springframework\data\spring-data-jpa\1.11.10.RELEASE\spring-data-jpa-1.11.10.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\data\spring-data-commons\1.13.10.RELEASE\spring-data-commons-1.13.10.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\spring-orm\4.3.14.RELEASE\spring-orm-4.3.14.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\spring-context\4.3.14.RELEASE\spring-context-4.3.14.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\spring-tx\4.3.14.RELEASE\spring-tx-4.3.14.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\spring-beans\4.3.14.RELEASE\spring-beans-4.3.14.RELEASE.jar;C:\Users\Alx\.m2\repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar;C:\Users\Alx\.m2\repository\org\slf4j\jcl-over-slf4j\1.7.25\jcl-over-slf4j-1.7.25.jar;C:\Users\Alx\.m2\repository\org\springframework\spring-aspects\4.3.14.RELEASE\spring-aspects-4.3.14.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\boot\spring-boot-starter-web\1.5.10.RELEASE\spring-boot-starter-web-1.5.10.RELEASE.jar;C:\Users\Alx\.m2\repository\org\hibernate\hibernate-validator\5.3.6.Final\hibernate-validator-5.3.6.Final.jar;C:\Users\Alx\.m2\repository\javax\validation\validation-api\1.1.0.Final\validation-api-1.1.0.Final.jar;C:\Users\Alx\.m2\repository\com\fasterxml\classmate\1.3.4\classmate-1.3.4.jar;C:\Users\Alx\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.8.10\jackson-databind-2.8.10.jar;C:\Users\Alx\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.8.0\jackson-annotations-2.8.0.jar;C:\Users\Alx\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.8.10\jackson-core-2.8.10.jar;C:\Users\Alx\.m2\repository\org\springframework\spring-web\4.3.14.RELEASE\spring-web-4.3.14.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\spring-webmvc\4.3.14.RELEASE\spring-webmvc-4.3.14.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\spring-expression\4.3.14.RELEASE\spring-expression-4.3.14.RELEASE.jar;C:\Users\Alx\.m2\repository\mysql\mysql-connector-java\5.1.45\mysql-connector-java-5.1.45.jar;C:\Users\Alx\.m2\repository\org\springframework\spring-core\4.3.14.RELEASE\spring-core-4.3.14.RELEASE.jar;C:\Users\Alx\.m2\repository\org\springframework\boot\spring-boot-starter-tomcat\1.5.10.RELEASE\spring-boot-starter-tomcat-1.5.10.RELEASE.jar;C:\Users\Alx\.m2\repository\org\apache\tomcat\embed\tomcat-embed-core\8.5.27\tomcat-embed-core-8.5.27.jar;C:\Users\Alx\.m2\repository\org\apache\tomcat\tomcat-annotations-api\8.5.27\tomcat-annotations-api-8.5.27.jar;C:\Users\Alx\.m2\repository\org\apache\tomcat\embed\tomcat-embed-el\8.5.27\tomcat-embed-el-8.5.27.jar;C:\Users\Alx\.m2\repository\org\apache\tomcat\embed\tomcat-embed-websocket\8.5.27\tomcat-embed-websocket-8.5.27.jar;C:\Users\Alx\.m2\repository\org\apache\tomcat\embed\tomcat-embed-jasper\8.5.27\tomcat-embed-jasper-8.5.27.jar;C:\Users\Alx\.m2\repository\org\eclipse\jdt\ecj\3.12.3\ecj-3.12.3.jar;C:\Users\Alx\.m2\repository\javax\servlet\jstl\1.2\jstl-1.2.jar" com.wtf4j.webapp.WebappApplication
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.10.RELEASE)
2018-02-11 15:53:17.055 INFO 9036 --- [ main] com.wtf4j.webapp.WebappApplication : Starting WebappApplication on AlxDskTp with PID 9036 (C:\Users\Alx\Desktop\webapp\target\classes started by Alx in C:\Users\Alx\Desktop\webapp)
2018-02-11 15:53:17.056 INFO 9036 --- [ main] com.wtf4j.webapp.WebappApplication : No active profile set, falling back to default profiles: default
2018-02-11 15:53:17.124 INFO 9036 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#17211155: startup date [Sun Feb 11 15:53:17 EET 2018]; root of context hierarchy
2018-02-11 15:53:18.273 INFO 9036 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$51114ec9] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-02-11 15:53:18.869 INFO 9036 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2018-02-11 15:53:18.884 INFO 9036 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-02-11 15:53:18.885 INFO 9036 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.27
2018-02-11 15:53:19.063 INFO 9036 --- [ost-startStop-1] org.apache.jasper.servlet.TldScanner : At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
2018-02-11 15:53:19.069 INFO 9036 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-02-11 15:53:19.069 INFO 9036 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1947 ms
2018-02-11 15:53:19.147 INFO 9036 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2018-02-11 15:53:19.150 INFO 9036 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-02-11 15:53:19.494 INFO 9036 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2018-02-11 15:53:19.502 INFO 9036 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2018-02-11 15:53:19.545 INFO 9036 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.0.12.Final}
2018-02-11 15:53:19.546 INFO 9036 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2018-02-11 15:53:19.546 INFO 9036 --- [ main] org.hibernate.cfg.Environment : HHH000021: Bytecode provider name : javassist
2018-02-11 15:53:19.570 INFO 9036 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2018-02-11 15:53:19.627 INFO 9036 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
2018-02-11 15:53:19.853 INFO 9036 --- [ main] org.hibernate.tool.hbm2ddl.SchemaUpdate : HHH000228: Running hbm2ddl schema update
2018-02-11 15:53:19.890 INFO 9036 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2018-02-11 15:53:20.067 INFO 9036 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[]}" onto public java.lang.String com.wtf4j.webapp.Controller.ProductController.write()
2018-02-11 15:53:20.072 INFO 9036 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-02-11 15:53:20.073 INFO 9036 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-02-11 15:53:20.121 INFO 9036 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#17211155: startup date [Sun Feb 11 15:53:17 EET 2018]; root of context hierarchy
2018-02-11 15:53:20.449 INFO 9036 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-02-11 15:53:20.488 INFO 9036 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2018-02-11 15:53:20.492 INFO 9036 --- [ main] com.wtf4j.webapp.WebappApplication : Started WebappApplication in 3.664 seconds (JVM running for 4.233)
2018-02-11 15:53:28.597 INFO 9036 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-02-11 15:53:28.597 INFO 9036 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2018-02-11 15:53:28.618 INFO 9036 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 21 ms
2018-02-11 15:53:28.708 ERROR 9036 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Could not resolve view with name 'index' in servlet with name 'dispatcherServlet'] with root cause
javax.servlet.ServletException: Could not resolve view with name 'index' in servlet with name 'dispatcherServlet'
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1266) ~[spring-webmvc-4.3.14.RELEASE.jar:4.3.14.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1041) ~[spring-webmvc-4.3.14.RELEASE.jar:4.3.14.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:984) ~[spring-webmvc-4.3.14.RELEASE.jar:4.3.14.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) ~[spring-webmvc-4.3.14.RELEASE.jar:4.3.14.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.14.RELEASE.jar:4.3.14.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) ~[spring-webmvc-4.3.14.RELEASE.jar:4.3.14.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.14.RELEASE.jar:4.3.14.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.27.jar:8.5.27]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) [tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) [tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790) [tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.27.jar:8.5.27]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.27.jar:8.5.27]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_151]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_151]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.27.jar:8.5.27]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_151]

I think, everything is correct expect jsp path, you can try to load all jsp files to /resources/WEB-INF/jsp/ this folder.
PS>I did not see WEB-INF folder in your resources folder you can create it manually

Solved!
Changed the packaging in the pom.xml to <packaging>war</packaging>
Then added the following bean to WebappApplication.java Class (made sure it points to the correct folder which after the latest changes is /webapp/view/ jsp's are in here):
#Bean
public ViewResolver internalResourceViewResolver() {
InternalResourceViewResolver bean = new InternalResourceViewResolver();
bean.setViewClass(JstlView.class);
bean.setPrefix("/view/");
bean.setSuffix(".jsp");
return bean;
}
And it works. Don't really understand why but its a start.

Static content is not getting loaded with spring boot

I am breaking my head with this issue. I have a simple controller class with the capability to render a simple html page along with the Spring boot initializer class.
I have placed the HTML page in the static folder under src/main/resources directory.
But I am not able to get the html page. Instead I get 404 error.
Below is the structure of my project
Below is my Pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Below are the controller and Spring Initializer class
DemoApplication.java:
package com.example;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
SimpleController.java:
package com.example.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
#Controller
public class SimpleController {
#RequestMapping("/")
public String home(){
System.out.println("Hello Home...");
return "home";
}
}
home.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Hello</title>
</head>
<body>
Helloooo......
</body>
</html>
Console Logs on running the Spring Boot:
:: Spring Boot :: (v1.5.1.RELEASE)
2017-02-28 10:46:26.676 INFO 8240 --- [ main] com.example.DemoApplication : Starting DemoApplication on abc with PID 8240 (C:\SpringBootEx\demo\target\classes started by abc in C:\SpringBootEx\demo)
2017-02-28 10:46:26.681 INFO 8240 --- [ main] com.example.DemoApplication : No active profile set, falling back to default profiles: default
2017-02-28 10:46:26.771 INFO 8240 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#70b0b186: startup date [Tue Feb 28 10:46:26 MST 2017]; root of context hierarchy
2017-02-28 10:46:28.281 INFO 8240 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration' of type [class org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2017-02-28 10:46:28.514 INFO 8240 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'validator' of type [class org.springframework.validation.beanvalidation.LocalValidatorFactoryBean] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2017-02-28 10:46:28.949 INFO 8240 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-02-28 10:46:28.973 INFO 8240 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat
2017-02-28 10:46:28.974 INFO 8240 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.11
2017-02-28 10:46:29.194 INFO 8240 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2017-02-28 10:46:29.194 INFO 8240 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2428 ms
2017-02-28 10:46:29.448 INFO 8240 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2017-02-28 10:46:29.455 INFO 8240 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/]
2017-02-28 10:46:29.457 INFO 8240 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/]
2017-02-28 10:46:29.458 INFO 8240 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/]
2017-02-28 10:46:29.458 INFO 8240 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/]
2017-02-28 10:46:29.967 INFO 8240 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#70b0b186: startup date [Tue Feb 28 10:46:26 MST 2017]; root of context hierarchy
2017-02-28 10:46:30.071 INFO 8240 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/]}" onto public java.lang.String com.example.controller.SimpleController.home()
2017-02-28 10:46:30.080 INFO 8240 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2017-02-28 10:46:30.081 INFO 8240 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2017-02-28 10:46:30.145 INFO 8240 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-02-28 10:46:30.145 INFO 8240 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-02-28 10:46:30.194 INFO 8240 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2017-02-28 10:46:30.478 INFO 8240 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2017-02-28 10:46:30.582 INFO 8240 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2017-02-28 10:46:30.590 INFO 8240 --- [ main] com.example.DemoApplication : Started DemoApplication in 4.391 seconds (JVM running for 5.147)
2017-02-28 10:49:04.176 INFO 8240 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2017-02-28 10:49:04.176 INFO 8240 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2017-02-28 10:49:04.205 INFO 8240 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 29 ms
Hello Home...
Can someone please help me in getting the view rendered? Thanks..

You can place home.html into one of the following locations:
src/main/resources/META-INF/resources/home.html
src/main/resources/resources/home.html
src/main/resources/static/home.html
src/main/resources/public/home.html
and make
#RequestMapping("/")
public String home() {
System.out.println("Hello Home...");
return "home.html";
}

Add the below tags inside <build></build>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
</resources>`
</build>

Spring Batch with two Steps in flow. Why second step never run and first step is in infinite loop

My requirements: create a scheduler to call the batch periodically and, inside of the batch, I need two steps. StepA will start run and accordingly to the outcome, StepB will called.
If you look at the Console Log you will see that the stepA is been called several time in, let's say, exact same moment. According to #Scheduled(fixedRate=60000) there should be just one call in each minute. Iguess that the problem has no relationship with Scheduller since I removed the schedulling and I faced similiar issue. Other related problem is that StepB is never called. I tried to create customDecider ("...next(customDecider()") and to create a private method to return JobExecutionDecider. It seems that both didn't take effect at all.
My best guess is that the pool-thread is causing some "infinite loop" in StepA because I didn't setup something properly but I didn't find what could be it.
BatchConfig.java
/*#Bean
public JobExecutionDecider customDecider() throws Exception{
return new CustomDecider();
}*/
private JobExecutionDecider decider(boolean decision){
return(jobExecution, stepExecution) -> new FlowExecutionStatus(decision ? "OK" : "FAILED");
}
#Bean
public Job job(Step stepA, Step stepB) {
return jobBuilderFactory.get("job1")
//.flow(stepA).on("FAILED").to(stepB).end().build();
.start(stepA)
.next(decider(true))
.on("FAILED")
.stop()
.from(stepA)
.next(stepB)
.build()
.build();
}
#Bean
public Step stepA(ItemReader<String> readerA, ItemWriter<String> writerA) {
return stepBuilderFactory.get("stepA").<String, String> chunk(1)
.reader(readerA)
.writer(writerA)
.allowStartIfComplete(true)
.build();
}
#Bean
#StepScope
public ItemReader<String> readerA() {
return new CustomItemReaderA();
}
#Bean
public ItemWriter<String> writerA() {
return new CustomItemWriterA();
}
#Bean
public Step stepB(ItemReader<String> readerB, ItemWriter<String> writerB) {
return stepBuilderFactory.get("stepB").<String, String> chunk(1)
.reader(readerB)
.writer(writerB)
.allowStartIfComplete(true)
.build();
}
#Bean
#StepScope
public ItemReader<String> readerB() {
return new CustomItemReaderB();
}
#Bean
public ItemWriter<String> writerB() {
return new CustomItemWriterB();
}
CustomDecider.java
public class CustomDecider implements JobExecutionDecider {
#Override
public FlowExecutionStatus decide(JobExecution jobExecution,
StepExecution stepExecution) {
return new FlowExecutionStatus("OK");
}
}
CustomItemReaderA
public class CustomItemReaderA implements ItemReader<String>{
private static final Logger log = LoggerFactory.getLogger(CustomItemReaderA.class);
#Override
public String read() throws Exception, UnexpectedInputException,
ParseException, NonTransientResourceException {
log.info("rA");
return "A";
}
}
CustomItemWriterA
public class CustomItemWriterA implements ItemWriter<String> {
private static final Logger log = LoggerFactory.getLogger(CustomItemWriterA.class);
#Override
public void write(List<? extends String> items) throws Exception {
log.info("wA");
}
}
CustomItemReaderB and CustomItemReaderB are identical to Custom...A just changing from A to B letters during log.info and return
Console Log
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.488 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.504 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemReaderA : rA
2016-01-18 21:40:37.519 INFO 7340 --- [pool-2-thread-1] com.example.CustomItemWriterA : wA
and so on ...
Scheduler
#Component
public class QueueScheduler {
private static final Logger log = LoggerFactory
.getLogger(QueueScheduler.class);
private Job job;
private JobLauncher jobLauncher;
#Autowired
public QueueScheduler(JobLauncher jobLauncher, #Qualifier("job") Job job){
this.job = job;
this.jobLauncher = jobLauncher;
}
#Scheduled(fixedRate=60000)
public void runJob(){
try{
jobLauncher.run(job, new JobParameters());
}catch(Exception ex){
log.info(ex.getMessage());
}
}
}

The Problem is with your CustomItemReaderA. You need to tell the Reader when to stop 'reading' for data. If you modify the reader as given below, the execution will happen as expected.
public class CustomItemReaderA implements ItemReader<String> {
private static final Logger log = LoggerFactory
.getLogger(CustomItemReaderA.class);
private int readCount = 0;
#Override
public String read() throws Exception, UnexpectedInputException,
ParseException, NonTransientResourceException {
log.info("Inside CustomItemReaderA");
if (readCount == 1) {
return null;
}
readCount++;
return "Read CustomItemReaderA";
}
}

Mongo tries to connect automatically to port 27017(localhost)

I am using Spring Rest and Mongo in Maven to make a web service that connects to a server. The problem is that I haven't written any code for Mongo and it is trying to connect to localhost throwing me a MongoSocketOpenException. The only code I've written is a two line code that starts spring from main.This is the stacktrace:
2015-12-22 12:46:43.193 INFO 5720 --- [ main] fhirepsos.ws.Server : Starting Server on HarisPC with PID 5720 (C:\Users\Haris\workspace\FHIRtoepSOSConversion\target\classes started by Haris in C:\Users\Haris\workspace\FHIRtoepSOSConversion)
2015-12-22 12:46:43.197 INFO 5720 --- [ main] fhirepsos.ws.Server : No profiles are active
2015-12-22 12:46:43.260 INFO 5720 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#31f924f5: startup date [Tue Dec 22 12:46:43 EET 2015]; root of context hierarchy
2015-12-22 12:46:44.007 INFO 5720 --- [ main] o.s.b.f.s.DefaultListableBeanFactory : Overriding bean definition for bean 'beanNameViewResolver' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter; factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter.class]]
2015-12-22 12:46:44.735 INFO 5720 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 9001 (http)
2015-12-22 12:46:44.750 INFO 5720 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat
2015-12-22 12:46:44.751 INFO 5720 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.0.28
2015-12-22 12:46:44.865 INFO 5720 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2015-12-22 12:46:44.866 INFO 5720 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1610 ms
2015-12-22 12:46:45.161 INFO 5720 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2015-12-22 12:46:45.166 INFO 5720 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2015-12-22 12:46:45.166 INFO 5720 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2015-12-22 12:46:45.167 INFO 5720 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2015-12-22 12:46:45.167 INFO 5720 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2015-12-22 12:46:45.393 INFO 5720 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for #ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext#31f924f5: startup date [Tue Dec 22 12:46:43 EET 2015]; root of context hierarchy
2015-12-22 12:46:45.467 INFO 5720 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2015-12-22 12:46:45.468 INFO 5720 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest)
2015-12-22 12:46:45.499 INFO 5720 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2015-12-22 12:46:45.499 INFO 5720 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2015-12-22 12:46:45.539 INFO 5720 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2015-12-22 12:46:45.726 INFO 5720 --- [ main] org.mongodb.driver.cluster : Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
2015-12-22 12:46:45.796 INFO 5720 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2015-12-22 12:46:45.874 INFO 5720 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 9001 (http)
2015-12-22 12:46:45.878 INFO 5720 --- [ main] fhirepsos.ws.Server : Started Server in 3.033 seconds (JVM running for 3.383)
2015-12-22 12:46:46.764 INFO 5720 --- [localhost:27017] org.mongodb.driver.cluster : Exception in monitor thread while connecting to server localhost:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
at com.mongodb.connection.SocketStream.open(SocketStream.java:63) ~[mongo-java-driver-3.2.0.jar:na]
at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:114) ~[mongo-java-driver-3.2.0.jar:na]
at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:128) ~[mongo-java-driver-3.2.0.jar:na]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_65]
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_65]
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) ~[na:1.8.0_65]
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) ~[na:1.8.0_65]
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) ~[na:1.8.0_65]
at java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[na:1.8.0_65]
at java.net.PlainSocketImpl.connect(Unknown Source) ~[na:1.8.0_65]
at java.net.SocksSocketImpl.connect(Unknown Source) ~[na:1.8.0_65]
at java.net.Socket.connect(Unknown Source) ~[na:1.8.0_65]
at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:50) ~[mongo-java-driver-3.2.0.jar:na]
at com.mongodb.connection.SocketStream.open(SocketStream.java:58) ~[mongo-java-driver-3.2.0.jar:na]
... 3 common frames omitted
This is my pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>fhirepsos.ws</groupId>
<artifactId>FHIRtoepSOSConversion</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>FHIR to epSOS Conversion</name>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.0.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongo-java-driver</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>ca.uhn.hapi.fhir</groupId>
<artifactId>hapi-fhir-base</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>ca.uhn.hapi.fhir</groupId>
<artifactId>hapi-fhir-structures-dstu2</artifactId>
<version>1.3</version>
</dependency>
</dependencies>
<properties>
<java.version>1.8</java.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<url>https://repo.spring.io/libs-release</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<url>https://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
</project>
Finally I have to state that despite the exception the program works fine
Thanks in advance!

Spring Boot has a feature called "auto configuration". In this case, as soon as the Mongo driver is detected on the classpath, the MongoAutoConfiguration is activated with default values, which point to localhost:27017. If you don't want that behaviour, you can now either configure the properties for MongoDB (see http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#boot-features-mongodb for valid property keys) or disable the MongoAutoConfiguration:
#SpringBootApplication(exclude = {MongoAutoConfiguration.class, MongoDataAutoConfiguration.class})

In some cases, if you are using reactive you also need to remove MongoReactiveAutoConfiguration
spring:
autoconfigure:
exclude:
- org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration
- org.springframework.boot.autoconfigure.mongo.MongoReactiveAutoConfiguration

Spring boot throws this exception when Mongo DB is not running. Please make sure that Mongodb is running. It got resolved for me after starting Mongo DB.

for springboot, you should add following config to your application.property
spring.data.mongodb.host=localhost(your mongo server)
spring.data.mongodb.port=27017(mongo port)

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