May be your data service is not returning any response. Can you check whether the callout service returns a proper response?
On Thu, Feb 13, 2014 at 3:23 PM, Udara Liyanage <ud...@wso2.com> wrote: > Hi, > > I am getting the following error when I have the below callout mediator in > a proxy. The service is in DSS server. > <callout serviceURL="http://10.100.0.38:9764/services/IF0030/ " > action="urn:O_ProductCategory" > > > > useServerConfig="true"> > <source xmlns:ns="http://org.apache.synapse/xsd"; > xpath="$body/child::*[fn:position()=1]"/> > <target xmlns:ns="http://org.apache.synapse/xsd"; > xpath="$body/child::*[fn:position()=1]"/> > </callout> > > > > [2014-02-13 04:48:12,387] ERROR -* NativeWorkerPool Uncaught exception* > java.lang.NullPointerException > at > org.apache.axiom.om.impl.llom.OMNodeImpl.insertSiblingAfter(OMNodeImpl.java:203) > at org.apache.synapse.mediators.builtin.*CalloutMediator* > .mediate(CalloutMediator.java:193) > at > org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:77) > at > org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:47) > at > org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:131) > at > org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:196) > at > org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:77) > at > org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:47) > at > org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:131) > at > org.apache.synapse.core.axis2.ProxyServiceMessageReceiver.receive(ProxyServiceMessageReceiver.java:166) > at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) > at > org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:403) > at > org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:183) > at > org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172) > at > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) > at java.lang.Thread.run(Thread.java:662) > > > -- > Udara Liyanage > Software Engineer > WSO2, Inc.: http://wso2.com > lean. enterprise. middleware > > web: http://udaraliyanage.wordpress.com > phone: +94 71 443 6897 > > _______________________________________________ > Dev mailing list > Dev@wso2.org > http://wso2.org/cgi-bin/mailman/listinfo/dev > > -- Isuru Perera Senior Software Engineer | WSO2, Inc. | http://wso2.com/ Lean . Enterprise . Middleware about.me/chrishantha
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