[SYNAPSE-1015] Message building fails at high concurrency when the outsequence is content aware

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.1
• Fix Version/s: 3.0.0
• Component/s: Core, Transports
• Assignee: Ravi Undupitiya
• Reporter: Senduran
• Created: 23/May/16 18:27
• Updated: 09/Sep/16 13:59
• Resolved: 09/Sep/16 13:59

Description

When invoke the following proxy at a concurrency (around 200)

<proxy xmlns="http://ws.apache.org/ns/synapse"
       name="HelloProxy"
       transports="https,http"
       statistics="disable"
       trace="disable"
       startOnLoad="true">
   <target>
      <inSequence>
         <send>
            <endpoint>
               <address uri="http://localhost:9765/services/HelloService/"/>
            </endpoint>
         </send>
      </inSequence>
      <outSequence>
         <enrich>
            <source type="inline" clone="true">
               <sss xmlns="">a</sss>
            </source>
            <target type="property" property="bar"/>
         </enrich>
         <send/>
      </outSequence>
   </target>
   <publishWSDL uri="http://localhost:9765/services/HelloService?wsdl"/>
   <description/>
</proxy>

Following exception occurs after a while,

2016-05-23 23:51:09,455 [-] [PassThroughMessageProcessor-30] ERROR RelayUtils Error while building PassThrough stream
org.apache.axiom.om.DeferredParsingException: com.ctc.wstx.exc.WstxUnexpectedCharException: Illegal character (NULL, unicode 0) encountered: not valid in any content
 at [row,col {unknown-source}]: [1,1]
	at org.apache.axiom.om.impl.builder.StAXOMBuilder.parserNext(StAXOMBuilder.java:681)
	at org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:184)
	at org.apache.axiom.core.CoreParentNodeSupport.ajc$interMethod$org_apache_axiom_core_CoreParentNodeSupport$org_apache_axiom_core_CoreParentNode$buildNext(CoreParentNodeSupport.aj:96)
	at org.apache.axiom.om.impl.llom.OMDocumentImpl.buildNext(OMDocumentImpl.java:1)
	at org.apache.axiom.core.CoreParentNodeSupport.ajc$interMethodDispatch1$org_apache_axiom_core_CoreParentNodeSupport$org_apache_axiom_core_CoreParentNode$buildNext(CoreParentNodeSupport.aj)
	at org.apache.axiom.core.CoreParentNodeSupport.ajc$interMethod$org_apache_axiom_core_CoreParentNodeSupport$org_apache_axiom_core_CoreParentNode$coreGetFirstChild(CoreParentNodeSupport.aj:113)
	at org.apache.axiom.om.impl.llom.OMDocumentImpl.coreGetFirstChild(OMDocumentImpl.java:1)
	at org.apache.axiom.core.CoreParentNodeSupport.ajc$interMethodDispatch1$org_apache_axiom_core_CoreParentNodeSupport$org_apache_axiom_core_CoreParentNode$coreGetFirstChild(CoreParentNodeSupport.aj)
	at org.apache.axiom.core.CoreDocumentSupport.ajc$interMethod$org_apache_axiom_core_CoreDocumentSupport$org_apache_axiom_core_CoreDocument$coreGetDocumentElement(CoreDocumentSupport.aj:42)
	at org.apache.axiom.om.impl.llom.OMDocumentImpl.coreGetDocumentElement(OMDocumentImpl.java:1)
	at org.apache.axiom.om.impl.common.AxiomDocumentSupport.ajc$interMethod$org_apache_axiom_om_impl_common_AxiomDocumentSupport$org_apache_axiom_om_impl_intf_AxiomDocument$getOMDocumentElement(AxiomDocumentSupport.aj:32)
	at org.apache.axiom.om.impl.llom.OMDocumentImpl.getOMDocumentElement(OMDocumentImpl.java:1)
	at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:557)
	at org.apache.axiom.om.impl.builder.StAXOMBuilder.getDocumentElement(StAXOMBuilder.java:553)
	at org.apache.axis2.builder.SOAPBuilder.processDocument(SOAPBuilder.java:53)
	at org.apache.synapse.transport.passthru.util.DeferredMessageBuilder.getDocument(DeferredMessageBuilder.java:114)
	at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:146)
	at org.apache.synapse.transport.passthru.util.RelayUtils.buildMessage(RelayUtils.java:86)
	at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:62)
	at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:114)
	at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:230)
	at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:444)
	at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:221)
	at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:169)
	at org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:221)
	at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:173)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: com.ctc.wstx.exc.WstxUnexpectedCharException: Illegal character (NULL, unicode 0) encountered: not valid in any content
 at [row,col {unknown-source}]: [1,1]
	at com.ctc.wstx.sr.StreamScanner.constructNullCharException(StreamScanner.java:630)
	at com.ctc.wstx.sr.StreamScanner.throwInvalidSpace(StreamScanner.java:660)
	at com.ctc.wstx.sr.StreamScanner.throwInvalidSpace(StreamScanner.java:651)
	at com.ctc.wstx.sr.BasicStreamReader.readSpacePrimary(BasicStreamReader.java:4965)
	at com.ctc.wstx.sr.BasicStreamReader.nextFromProlog(BasicStreamReader.java:2008)
	at com.ctc.wstx.sr.BasicStreamReader.next(BasicStreamReader.java:1134)
	at org.apache.axiom.util.stax.wrapper.XMLStreamReaderWrapper.next(XMLStreamReaderWrapper.java:225)
	at org.apache.axiom.util.stax.dialect.DisallowDoctypeDeclStreamReaderWrapper.next(DisallowDoctypeDeclStreamReaderWrapper.java:34)
	at org.apache.axiom.util.stax.wrapper.XMLStreamReaderWrapper.next(XMLStreamReaderWrapper.java:225)
	at org.apache.axiom.om.impl.builder.StAXOMBuilder.parserNext(StAXOMBuilder.java:666)
	... 28 more