Issue Microservice routed to Gateway - spring

Question

I've built seperately :
Eureka Server,
Spring Cloud Gateway (+ Discovery Client),
Spring Web App (+ Discovery Client)
Eureka Server Main Class :
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
#SpringBootApplication
#EnableEurekaServer
public class ServiceRegistryApplication {
public static void main(String[] args) {
SpringApplication.run(ServiceRegistryApplication.class, args);
}
}
and application.yml
server:
port: 8761
eureka:
client:
fetch-registry: false
register-with-eureka: false
Gateway Main Class :
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
#SpringBootApplication
#EnableEurekaClient
public class GatewayApplication {
public static void main(String[] args) {
SpringApplication.run(GatewayApplication.class, args);
}
}
and application.yml
server:
port: 8080
spring:
application:
name: GATEWAY
cloud:
gateway:
routes:
-id: MICROSERVICE
uri: lb://MICROSERVICE
predicates:
- Path: /service/**
eureka:
client:
register-with-eureka: true
fetch-registry: true
service-url:
defualtZone: http://localhost:8761/eureka
instance: localhost
Microservice Main Class :
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
#SpringBootApplication
#EnableEurekaClient
public class MicroserviceApplication {
public static void main(String[] args) {
SpringApplication.run(MicroserviceApplication.class, args);
}
}
Microservice Controller :
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
#RequestMapping
#RestController
public class HelloController {
#GetMapping("/test")
public String getWelcomed() {
return "Welcome to Microservice !";
}
}
and application.yml
server:
port: 8099
spring:
application:
name: MICROSERVICE
eureka:
client:
register-with-eureka: true
fetch-registry: true
service-url:
defualtZone: http://localhost:8761/eureka
instance: localhost
My issue now is that I can't access my microservice '/test' call through the gateway.
I keep getting this error :
Whitelabel Error Page This application has no configured error view,
so you are seeing this as a fallback.
Wed Dec 23 21:10:14 WEST 2020 [3c6a9e3d-9] There was an unexpected
error (type=Not Found, status=404).
org.springframework.web.server.ResponseStatusException: 404 NOT_FOUND
at
org.springframework.web.reactive.resource.ResourceWebHandler.lambda$handle$0(ResourceWebHandler.java:325)
Suppressed:
reactor.core.publisher.FluxOnAssembly$OnAssemblyException: Error has
been observed at the following site(s): |_ checkpoint ⇢
org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter
[DefaultWebFilterChain] |_ checkpoint ⇢
org.springframework.boot.actuate.metrics.web.reactive.server.MetricsWebFilter
[DefaultWebFilterChain] |_ checkpoint ⇢ HTTP GET "/service/test"
[ExceptionHandlingWebHandler] Stack trace: at
org.springframework.web.reactive.resource.ResourceWebHandler.lambda$handle$0(ResourceWebHandler.java:325)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:44)
at reactor.core.publisher.Mono.subscribe(Mono.java:4252) at
reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:75)
at
reactor.core.publisher.MonoFlatMap$FlatMapMain.onComplete(MonoFlatMap.java:174)
at
reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:96)
at
reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:359)
at
reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:211)
at
reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:161)
at
reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86)
at reactor.core.publisher.Mono.subscribe(Mono.java:4252) at
reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:172)
at
reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56)
at
reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150)
at
reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67)
at
reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76)
at
reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:274)
at
reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:851)
at
reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121)
at
reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2344)
at
reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:162)
at
reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2152)
at
reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:2026)
at
reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90)
at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) at
reactor.core.publisher.Mono.subscribe(Mono.java:4252) at
reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:441)
at
reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:211)
at
reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:161)
at
reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86)
at
reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at
reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at
reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at
reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at reactor.core.publisher.Mono.subscribe(Mono.java:4252) at
reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:172)
at
reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56)
at
reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at
reactor.netty.http.server.HttpServerHandle.onStateChange(HttpServerHandle.java:65)
at
reactor.netty.ReactorNetty$CompositeConnectionObserver.onStateChange(ReactorNetty.java:518)
at
reactor.netty.tcp.TcpServerBind$ChildObserver.onStateChange(TcpServerBind.java:278)
at
reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:475)
at
reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:96)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at
reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:191)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at
io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
at
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324)
at
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296)
at
io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
at
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) at
io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at
io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:834)
I've tried hiding the gateway from my eureka server based on some suggestions I've found, yet the issue persists by addind this to my application.yml in gateway :
eureka:
client:
register-with-eureka: false
fetch-registry: false

Answer 1

controller should be
#RestController
#RequestMapping("/service")
public class HelloController
and the URL : http://localhost:8080/service/test
or you can leave #RequestMapping() in the controller and make the gateway using this path :
predicates:
-Path=/**
then the URL should be: http://localhost:8080/test