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https://issues.apache.org/jira/browse/CAMEL-5469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16363711#comment-16363711
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John Poth commented on CAMEL-5469:
----------------------------------
Hi [~batwad], you may want to try out CAMEL-9628 which is available since 2.17.
With the singleton property set to true, Camel will only create one instance of
CxfRsProducer and ConcurrentModificationException should be avoided. HTH
> CxfRsProducer is not thread safe
> --------------------------------
>
> Key: CAMEL-5469
> URL: https://issues.apache.org/jira/browse/CAMEL-5469
> Project: Camel
> Issue Type: Bug
> Components: camel-cxf
> Affects Versions: 2.10.0
> Environment: apache-maven-3.0
> tomcat 6.0.35
> Reporter: Dumitru Pascu
> Assignee: Willem Jiang
> Priority: Major
> Fix For: 2.11.0
>
> Attachments: CamelRoute.java,
> CxfRsProducerClientFactoryCacheTest.java,
> CxfRsProducerClientFactoryCacheTest1.xml, camel-example-cxf-tomcat.zip
>
>
> The example is based on the camel-example-cxf-tomcat.
> Components:
> 1. Have a CXF rest web service configured in camel-config.
> 2. Have a Camel CXF client cxf:rsClient used to call web service from point 1.
> 3. Have a Camel CXF server cxf:rsServer which acts as a proxy for service
> from point 1 by passing inbount message towards client from point 2.
> Flow:
> 1. Service 3 receives message
> 2. Message is passed to component 2 (Camel cxf client)
> 3. Component 2 invokes service 1
> 4. Response received is transformed using a custom processor
> Problem:
> When having multiple requests in parallel, following error appears
> (CxfRsProducer does not seem to be thread safe):
> {noformat}
> java.lang.RuntimeException: java.util.ConcurrentModificationException
> at
> org.apache.cxf.jaxrs.client.JAXRSClientFactoryBean.createWebClient(JAXRSClientFactoryBean.java:217)[cxf-rt-frontend-jaxrs-2.6.1.jar:2.6.1]
> at
> org.apache.camel.component.cxf.jaxrs.CxfRsProducer.invokeHttpClient(CxfRsProducer.java:100)[camel-cxf-2.10.0.jar:2.10.0]
> at
> org.apache.camel.component.cxf.jaxrs.CxfRsProducer.process(CxfRsProducer.java:87)[camel-cxf-2.10.0.jar:2.10.0]
> at
> org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.SendProcessor$2.doInAsyncProducer(SendProcessor.java:120)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.impl.ProducerCache.doInAsyncProducer(ProducerCache.java:292)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.SendProcessor.process(SendProcessor.java:115)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:99)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:73)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:99)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:91)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:330)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:220)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.RouteContextProcessor.processNext(RouteContextProcessor.java:45)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.interceptor.DefaultChannel.process(DefaultChannel.java:303)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.Pipeline.process(Pipeline.java:117)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.Pipeline.process(Pipeline.java:80)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.RouteContextProcessor.processNext(RouteContextProcessor.java:45)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.UnitOfWorkProcessor.processAsync(UnitOfWorkProcessor.java:150)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:117)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.RouteInflightRepositoryProcessor.processNext(RouteInflightRepositoryProcessor.java:48)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:99)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:90)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:73)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:99)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:86)[camel-core-2.10.0.jar:2.10.0]
> at
> org.apache.camel.component.cxf.jaxrs.CxfRsInvoker.syncInvoke(CxfRsInvoker.java:122)[camel-cxf-2.10.0.jar:2.10.0]
> at
> org.apache.camel.component.cxf.jaxrs.CxfRsInvoker.performInvocation(CxfRsInvoker.java:60)[camel-cxf-2.10.0.jar:2.10.0]
> at
> org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96)[cxf-api-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:167)[cxf-rt-frontend-jaxrs-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:94)[cxf-rt-frontend-jaxrs-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)[cxf-api-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:94)[cxf-api-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:262)[cxf-api-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:122)[cxf-api-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:211)[cxf-rt-transports-http-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:213)[cxf-rt-transports-http-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:154)[cxf-rt-transports-http-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:129)[cxf-rt-transports-http-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:187)[cxf-rt-transports-http-2.6.1.jar:2.6.1]
> at
> org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:115)[cxf-rt-transports-http-2.6.1.jar:2.6.1]
> at
> javax.servlet.http.HttpServlet.service(HttpServlet.java:617)[servlet-api.jar:]
> at
> org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:166)[cxf-rt-transports-http-2.6.1.jar:2.6.1]
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)[catalina.jar:6.0.35]
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)[catalina.jar:6.0.35]
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)[catalina.jar:6.0.35]
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)[catalina.jar:6.0.35]
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)[catalina.jar:6.0.35]
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)[catalina.jar:6.0.35]
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)[catalina.jar:6.0.35]
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)[catalina.jar:6.0.35]
> at
> org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)[tomcat-coyote.jar:6.0.35]
> at
> org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)[tomcat-coyote.jar:6.0.35]
> at
> org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)[tomcat-coyote.jar:6.0.35]
> at java.lang.Thread.run(Thread.java:662)[:1.6.0_25]
> {noformat}
> Whole project is attached, including Jmeter JMX (which is under
> \camel-example-cxf-tomcat\jmeter\ folder from the zip file).
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