servicemix 4.3.2 camel cxf producer to cxf-nmr consumer Not Working - apache-servicemix

Question

I've been trying to get two separate bundles to communicate via a nmr endpoint using a camel cxf producer. I have been working on this all week and so far I can't get it to work.
I can however all the nmr endpoint just as in example cxf-camel-nmr without issue so I know that bundle is ok. Seriously this is a super simple hello world prototype and I can't get it to work.
Any help or suggestions would be awesome!!
Env: Java 1.5
Apache Servicemix 4.3.2 (virgin installation)
In servicemix I have two separate osgi bundles. I am unable to get my camel cxf producer to successfully call the nmr endpoint and have zero clue on how to fix.
Bundle #1 cxf-nmr //consumer
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jaxws="http://cxf.apache.org/jaxws"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd">
<import resource="classpath:META-INF/cxf/cxf.xml" />
<import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" />
<import resource="classpath:META-INF/cxf/transport/nmr/cxf-transport-nmr.xml" />
<jaxws:endpoint id="helloWorld1"
implementor="org.apache.servicemix.examples.cxf.HelloWorldImpl"
address="nmr:HelloWorld1" />
</beans>
Bundle #2 //producer
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:osgi="http://www.springframework.org/schema/osgi"
xmlns:camel="http://camel.apache.org/schema/spring"
xmlns:cxf="http://camel.apache.org/schema/cxf"
xsi:schemaLocation="
http://camel.apache.org/schema/cxf http://camel.apache.org/schema/cxf/camel-cxf.xsd
http://servicemix.apache.org/http/1.0 http://servicemix.apache.org/http/1.0/servicemix-http.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/osgi http://www.springframework.org/schema/osgi/spring-osgi.xsd
http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd">
<import resource="classpath:META-INF/cxf/cxf.xml" />
<import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" />
<import resource="classpath:META-INF/cxf/transport/nmr/cxf-transport-nmr.xml" />
<import resource="classpath:org/apache/servicemix/camel/nmr/camel-nmr.xml" />
<import resource="classpath:META-INF/cxf/cxf-extension-http.xml"/>
<import resource="classpath:META-INF/cxf/cxf-extension-http-jetty.xml" />
<camel:camelContext xmlns="http://camel.apache.org/schema/spring">
<route>
<from uri="cxf:bean:testEndpoint"/>
<to uri="nmr:HelloWorld1"/>
</route>
</camel:camelContext>
<cxf:cxfEndpoint
id="testEndpoint"
address="http://localhost:9090/test"
serviceClass="org.apache.servicemix.examples.cxf.HelloWorld">
<cxf:properties>
<entry key="dataFormat" value="PAYLOAD" />
</cxf:properties>
</cxf:cxfEndpoint>
</beans>
--
#################
soap request response
#################
<?xml version="1.0"?>
<SOAP-ENV:Envelope
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP-ENV:Body>
<m:sayHi xmlns:m="http://cxf.examples.servicemix.apache.org/">
<arg0>foobar</arg0>
</m:sayHi>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
STATUS: 500
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><soap:Fault><faultcode>soap:Server</faultcode><faultstring>java.lang.NullPointerException</faultstring></soap:Fault></soap:Body></soap:Envelope>
--
####################
Console Output - No Idea How To Fix
####################
18:56:04,544 | ERROR | oWorld1-thread-1 | NMRDestination | - - | error preparing message
java.lang.NullPointerException
at org.apache.cxf.staxutils.StaxUtils.createXMLStreamReader(StaxUtils.java:1183)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.staxutils.StaxUtils.copy(StaxUtils.java:427)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.staxutils.StaxUtils.copy(StaxUtils.java:380)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.servicemix.cxf.transport.nmr.NMRMessageHelper.convertMessageToInputStream(NMRMessageHelper.java:43)[203:org.apache.servicemix.cxf.transport.nmr:4.3.0]
at org.apache.servicemix.cxf.transport.nmr.NMRDestination.process(NMRDestination.java:127)[203:org.apache.servicemix.cxf.transport.nmr:4.3.0]
at org.apache.servicemix.nmr.core.InternalEndpointWrapper.process(InternalEndpointWrapper.java:86)[83:org.apache.servicemix.nmr.core:1.4.0]
at org.apache.servicemix.nmr.core.ChannelImpl.process(ChannelImpl.java:255)[83:org.apache.servicemix.nmr.core:1.4.0]
at org.apache.servicemix.nmr.core.ChannelImpl$1.run(ChannelImpl.java:215)[83:org.apache.servicemix.nmr.core:1.4.0]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:651)[:1.5.0_22]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:676)[:1.5.0_22]
at java.lang.Thread.run(Thread.java:595)[:1.5.0_22]
18:56:04,547 | WARN | oWorld1-thread-1 | NMR | 83 - org.apache.servicemix.nmr.core - 1.4.0 | Error processing exchange [
id: a778d16c-2955-41de-89e8-7775f4f976bf
mep: InOut
status: Active
role: Provider
target: PropertyMatchingReference[{NAME=HelloWorld1}]
properties: [
jaxwsContext = {javax.xml.ws.wsdl.operation={http://cxf.examples.servicemix.apache.org/}sayHi, javax.xml.ws.wsdl.description=http://localhost:9090/test?wsdl, javax.xml.ws.wsdl.service={http://cxf.examples.servicemix.apache.org/}HelloWorldService, javax.xml.ws.wsdl.interface={http://cxf.examples.servicemix.apache.org/}HelloWorld, javax.xml.ws.wsdl.port={http://cxf.examples.servicemix.apache.org/}HelloWorldPort}
CamelToEndpoint = nmr://HelloWorld1
org.apache.cxf.service.model.BindingOperationInfo = [BindingOperationInfo: {http://cxf.examples.servicemix.apache.org/}sayHi]
mtom-enabled = false
CamelCreatedTimestamp = Thu Jun 09 18:56:04 PDT 2011
CamelCXFDataFormat = PAYLOAD
]
]
org.apache.servicemix.nmr.api.ServiceMixException: java.lang.NullPointerException
at org.apache.servicemix.cxf.transport.nmr.NMRDestination.process(NMRDestination.java:151)[203:org.apache.servicemix.cxf.transport.nmr:4.3.0]
at org.apache.servicemix.nmr.core.InternalEndpointWrapper.process(InternalEndpointWrapper.java:86)[83:org.apache.servicemix.nmr.core:1.4.0]
at org.apache.servicemix.nmr.core.ChannelImpl.process(ChannelImpl.java:255)[83:org.apache.servicemix.nmr.core:1.4.0]
at org.apache.servicemix.nmr.core.ChannelImpl$1.run(ChannelImpl.java:215)[83:org.apache.servicemix.nmr.core:1.4.0]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:651)[:1.5.0_22]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:676)[:1.5.0_22]
at java.lang.Thread.run(Thread.java:595)[:1.5.0_22]
Caused by: java.lang.NullPointerException
at org.apache.cxf.staxutils.StaxUtils.createXMLStreamReader(StaxUtils.java:1183)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.staxutils.StaxUtils.copy(StaxUtils.java:427)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.staxutils.StaxUtils.copy(StaxUtils.java:380)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.servicemix.cxf.transport.nmr.NMRMessageHelper.convertMessageToInputStream(NMRMessageHelper.java:43)[203:org.apache.servicemix.cxf.transport.nmr:4.3.0]
at org.apache.servicemix.cxf.transport.nmr.NMRDestination.process(NMRDestination.java:127)[203:org.apache.servicemix.cxf.transport.nmr:4.3.0]
... 6 more
18:56:04,552 | ERROR | f2d4607-thread-1 | DefaultErrorHandler | 68 - org.apache.camel.camel-core - 2.6.0 | Failed delivery for exchangeId: ID-Dana-PC-45880-1307670949817-0-2. Exhausted after delivery attempt: 1 caught: org.apache.servicemix.nmr.api.ServiceMixException: java.lang.NullPointerException
org.apache.servicemix.nmr.api.ServiceMixException: java.lang.NullPointerException
at org.apache.servicemix.cxf.transport.nmr.NMRDestination.process(NMRDestination.java:151)[203:org.apache.servicemix.cxf.transport.nmr:4.3.0]
at org.apache.servicemix.nmr.core.InternalEndpointWrapper.process(InternalEndpointWrapper.java:86)[83:org.apache.servicemix.nmr.core:1.4.0]
at org.apache.servicemix.nmr.core.ChannelImpl.process(ChannelImpl.java:255)[83:org.apache.servicemix.nmr.core:1.4.0]
at org.apache.servicemix.nmr.core.ChannelImpl$1.run(ChannelImpl.java:215)[83:org.apache.servicemix.nmr.core:1.4.0]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:651)[:1.5.0_22]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:676)[:1.5.0_22]
at java.lang.Thread.run(Thread.java:595)[:1.5.0_22]
Caused by: java.lang.NullPointerException
at org.apache.cxf.staxutils.StaxUtils.createXMLStreamReader(StaxUtils.java:1183)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.staxutils.StaxUtils.copy(StaxUtils.java:427)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.staxutils.StaxUtils.copy(StaxUtils.java:380)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.servicemix.cxf.transport.nmr.NMRMessageHelper.convertMessageToInputStream(NMRMessageHelper.java:43)[203:org.apache.servicemix.cxf.transport.nmr:4.3.0]
at org.apache.servicemix.cxf.transport.nmr.NMRDestination.process(NMRDestination.java:127)[203:org.apache.servicemix.cxf.transport.nmr:4.3.0]
... 6 more
18:56:04,553 | WARN | qtp407691725-242 | PhaseInterceptorChain | - - | Interceptor for {http://cxf.examples.servicemix.apache.org/}HelloWorldService#{http://cxf.examples.servicemix.apache.org/}sayHi has thrown exception, unwinding now
org.apache.cxf.interceptor.Fault: java.lang.NullPointerException
at org.apache.camel.component.cxf.CxfConsumer$1.checkFailure(CxfConsumer.java:219)[118:org.apache.camel.camel-cxf:2.6.0]
at org.apache.camel.component.cxf.CxfConsumer$1.setResponseBack(CxfConsumer.java:196)[118:org.apache.camel.camel-cxf:2.6.0]
at org.apache.camel.component.cxf.CxfConsumer$1.asyncInvoke(CxfConsumer.java:116)[118:org.apache.camel.camel-cxf:2.6.0]
at org.apache.camel.component.cxf.CxfConsumer$1.invoke(CxfConsumer.java:73)[118:org.apache.camel.camel-cxf:2.6.0]
at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:93)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:255)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.phase.PhaseInterceptorChain.resume(PhaseInterceptorChain.java:224)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:70)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.transport.http_jetty.JettyHTTPDestination.serviceRequest(JettyHTTPDestination.java:311)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.transport.http_jetty.JettyHTTPDestination.doService(JettyHTTPDestination.java:280)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.transport.http_jetty.JettyHTTPHandler.handle(JettyHTTPHandler.java:72)[116:org.apache.cxf.bundle:2.3.2]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:931)[149:org.eclipse.jetty.server:7.2.2.v20101205]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:868)[149:org.eclipse.jetty.server:7.2.2.v20101205]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)[149:org.eclipse.jetty.server:7.2.2.v20101205]
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:185)[149:org.eclipse.jetty.server:7.2.2.v20101205]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:114)[149:org.eclipse.jetty.server:7.2.2.v20101205]
at org.eclipse.jetty.server.Server.handleAsync(Server.java:397)[149:org.eclipse.jetty.server:7.2.2.v20101205]
at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:601)[149:org.eclipse.jetty.server:7.2.2.v20101205]
at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:410)[149:org.eclipse.jetty.server:7.2.2.v20101205]
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:508)[144:org.eclipse.jetty.io:7.2.2.v20101205]
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.access$000(SelectChannelEndPoint.java:34)[144:org.eclipse.jetty.io:7.2.2.v20101205]
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)[144:org.eclipse.jetty.io:7.2.2.v20101205]
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:451)[143:org.eclipse.jetty.util:7.2.2.v20101205]
at java.lang.Thread.run(Thread.java:595)[:1.5.0_22]
Caused by: org.apache.servicemix.nmr.api.ServiceMixException: java.lang.NullPointerException
at org.apache.servicemix.cxf.transport.nmr.NMRDestination.process(NMRDestination.java:151)[203:org.apache.servicemix.cxf.transport.nmr:4.3.0]
at org.apache.servicemix.nmr.core.InternalEndpointWrapper.process(InternalEndpointWrapper.java:86)[83:org.apache.servicemix.nmr.core:1.4.0]
at org.apache.servicemix.nmr.core.ChannelImpl.process(ChannelImpl.java:255)[83:org.apache.servicemix.nmr.core:1.4.0]
at org.apache.servicemix.nmr.core.ChannelImpl$1.run(ChannelImpl.java:215)[83:org.apache.servicemix.nmr.core:1.4.0]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:651)[:1.5.0_22]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:676)[:1.5.0_22]
... 1 more
Caused by: java.lang.NullPointerException
at org.apache.cxf.staxutils.StaxUtils.createXMLStreamReader(StaxUtils.java:1183)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.staxutils.StaxUtils.copy(StaxUtils.java:427)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.cxf.staxutils.StaxUtils.copy(StaxUtils.java:380)[116:org.apache.cxf.bundle:2.3.2]
at org.apache.servicemix.cxf.transport.nmr.NMRMessageHelper.convertMessageToInputStream(NMRMessageHelper.java:43)[203:org.apache.servicemix.cxf.transport.nmr:4.3.0]
at org.apache.servicemix.cxf.transport.nmr.NMRDestination.process(NMRDestination.java:127)[203:org.apache.servicemix.cxf.transport.nmr:4.3.0]
... 6 more

Answer 1

It looks like I have been dealing with exactly same issue for the last two days. I believe I have by now solved it. Here's what I found out:
The NPE in StaxUtils seems to be due to a source (javax.xml.transform.Source) being null. it can be null when exchange.getIn().getBody(Source.class) returns null in the NMRDestination class. Here's where things get a little ugly. Let's make a step back.
To see whether your message had a body when it came in you would need to turn on TRACE log level. You can do that in servicemix console with log:set TRACE command. ExchangeUtils#display(Exchange) only gets called with the option to print out body in TRACE, not even in DEBUG. With TRACE on you will see things like:
id: 1520804564-51998-1331328769981-0-3
mep: InOut
status: Active
role: Consumer
target: ...
properties: [ ]
In: [
content:
]
the In.content section is essentially the body of the message. I am sure your exchange had a body just like mine did. Which means it was "lost" somewhere within the NMR/Camel routing schema.
The exchange.getIn().getBody(Source.class) goes through a special conversion logic that may silently (!) return null if something doesn't click. Take a look at org.apache.camel.impl.converter.BaseTypeConverterRegistry#doConvertTo().
When I was reading TRACE logs I noticed another subtle (almost an FYI) trace message about org.apache.xml.serializer.ToXMLStream not being visible to my bundle. I figured NMR was failing to convert the message to the Source object and was telling me nothing about it.
SOLUTION: I ended up adding org.apache.xml.serializer to my Import-Package maven instruction along with org.apache.xalan (once I added the serializer import the next thing that blew up was ClassNotFountException complaining about org.apache.xalan.xsltc.trax.DOM2SAX). Everything is there in runtime, it's all in lib/endorsed, it's just wasn't visible to my service bundle until now.
It now works and my message is at the destination endpoint. One more thing to pay attention to is the streamCache attribute of the Camel content. There's something about stream resources not being cached by default in latest versions of Camel and your code won't be able to read from a stream multiple times unless it's cached.
The question that remains is why do I have to make the service "aware" of those dependencies NMR/Camel needs to send my message down the route. Doesn't really make sense.