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Willem Jiang commented on CAMEL-3941: ------------------------------------- Another workaround is adding the synchronous option to be true on the camel-cxf endpoint like this. {code} from("cxf:xxx?synchronous=true").... {code} > Camel-cxf dependencies problem as: jetty-7.3.1 is servlet-2.5 and cxf-2.4.0 > is servlet-3.0 dependent > ---------------------------------------------------------------------------------------------------- > > Key: CAMEL-3941 > URL: https://issues.apache.org/jira/browse/CAMEL-3941 > Project: Camel > Issue Type: Bug > Components: build system, camel-cxf > Affects Versions: 2.8.0 > Environment: Apache ServiceMix 4.4-SNAPSHOT > Reporter: Piotr Klimczak > Labels: camel, cxf, jetty, servlet, specification > > Probably because of this: https://issues.apache.org/jira/browse/CAMEL-3784 i > have a problem with CXF dependencies in Camel as: > 1. Camel 2.8 uses CXF 2.4.0 and Jetty 7.3.1 > 2. CXF 2.4.0 uses servlet 3.0 > 3. Jetty 7.x.x uses servlet 2.5 > Let's take a look at my example: > {code:xml} > <bean id="sampleBean" class="com.acme.Service" /> > <cxfEndpoint id="acmeService" address="/acmeService" > serviceClass="#sampleBean" xmlns="http://camel.apache.org/schema/spring" /> > <camelContext id="testContext" trace="true" streamCache="false" > xmlns="http://camel.apache.org/schema/spring" > > <route> > <from uri="cxf:bean:acmeService" /> > <bean ref="sampleBean" /> > </route> > </camelContext> > {code} > Quite simple isn't it? > But how come that we have Servlet spec version conflict? Let's take a look at > class CXFConsumer of camel-cxf component: > Around the lines 66 we have: > {code} > if (!endpoint.isSynchronous() && (continuation = > getContinuation(cxfExchange)) != null) { > LOG.trace("Calling the Camel async processors."); > return asyncInvoke(cxfExchange, continuation); > } else { > {code} > so if we use async API (set as default) it will try to pickup the > Continuation as you can see around 111 line: > {code} > private Continuation getContinuation(Exchange cxfExchange) { > ContinuationProvider provider = > > (ContinuationProvider)cxfExchange.getInMessage().get(ContinuationProvider.class.getName()); > return provider == null ? null : provider.getContinuation(); > } > {code} > The ContinuationProvider contains value of class > Servlet3ContinuationProvider(cxf-rt-transports-http) which is Servlet 3.0 > ready only! > Let's go further to see what is happening in > Servlet3Continuation(cxf-rt-transports-http) class: > {code} > HttpServletRequest req; > //some code > final AsyncContext context; > //some code > context = req.startAsync(req, resp); > {code} > If you take a closer look at AsyncContext class you will see that cxf 2.4.0 > is expecting this class to be javax.servlet.AsyncContext type. > BUT jetty 7 returns org.eclipse.jetty.server.AsyncContext which is > incompatible. > The worse thing is, that *req* value of type org.eclipse.jetty.server.Request > that implements HttpServletRequest is expecting the HttpServletRequest to be > 3.0 Servlet spec but is the 2.5 servlet spec one. > All of this causes: > {code} > Caused by: java.lang.AbstractMethodError: > org.eclipse.jetty.server.Request.startAsync(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)Ljavax/servlet/AsyncContext; > at > org.apache.cxf.transport.http.Servlet3ContinuationProvider$Servlet3Continuation.<init>(Servlet3ContinuationProvider.java:77)[142:org.apache.cxf.bundle:2.4.0] > at > org.apache.cxf.transport.http.Servlet3ContinuationProvider.getContinuation(Servlet3ContinuationProvider.java:58)[142:org.apache.cxf.bundle:2.4.0] > at > org.apache.camel.component.cxf.CxfConsumer$1.getContinuation(CxfConsumer.java:114)[205:org.apache.camel.camel-cxf:2.8.0.SNAPSHOT] > at > org.apache.camel.component.cxf.CxfConsumer$1.invoke(CxfConsumer.java:66)[205:org.apache.camel.camel-cxf:2.8.0.SNAPSHOT] > at > org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)[142:org.apache.cxf.bundle:2.4.0] > at > java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)[:1.6.0_24] > at > java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)[:1.6.0_24] > at java.util.concurrent.FutureTask.run(FutureTask.java:138)[:1.6.0_24] > at > org.apache.cxf.workqueue.SynchronousExecutor.execute(SynchronousExecutor.java:37)[142:org.apache.cxf.bundle:2.4.0] > at > org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:106)[142:org.apache.cxf.bundle:2.4.0] > ... 34 more > {code} -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira