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https://issues.apache.org/jira/browse/TUSCANY-1003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12465799
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Venkatakrishnan commented on TUSCANY-1003:
------------------------------------------
Hi Ignacio,
I debugged this a bit and what I figure out is that in the
Output2OutputTransformer the output wrapper is null and this causes the NPE in
the Axiom databinding code.
The method seems to be getGreetings and the tranformer is looking at the result
which is null and creating a output wrapper for this which inturn also ends up
as null.
I guess Raymond will be able to throw better light on this while I continue to
see if I can get better info about this.
- Venkat
> NPE thrown by AxisEngine.send in service side of axis2 binding for async
> callbacks
> ----------------------------------------------------------------------------------
>
> Key: TUSCANY-1003
> URL: https://issues.apache.org/jira/browse/TUSCANY-1003
> Project: Tuscany
> Issue Type: Bug
> Components: Java SCA Axis Binding
> Affects Versions: Java-SCA-Mx
> Reporter: Ignacio Silva-Lepe
> Fix For: Java-SCA-Mx
>
>
> I'm seeing an NPE thrown by AxisEngine.send in the service side of the axis2
> binding for async callbacks. The trace is below. My current guess is that
> this may have something to do with the pass-by-value interceptor but I have
> not delved to deeply into the possible cause. For now I am leaving this in
> the Java SCA Axis binding component but that may change depending on the
> actual reason for the exception.
> org.apache.tuscany.binding.axis2.Axis2BindingRunTimeException:
> java.lang.NullPoi
> nterException
> at
> org.apache.tuscany.binding.axis2.Axis2ServiceCallbackTargetInvoker.in
> vokeTarget(Axis2ServiceCallbackTargetInvoker.java:78)
> at
> org.apache.tuscany.binding.axis2.Axis2ServiceCallbackTargetInvoker.in
> voke(Axis2ServiceCallbackTargetInvoker.java:90)
> at
> org.apache.tuscany.core.wire.InvokerInterceptor.invoke(InvokerInterce
> ptor.java:44)
> at
> org.apache.tuscany.core.databinding.impl.PassByValueInterceptor.invok
> e(PassByValueInterceptor.java:65)
> at
> org.apache.tuscany.core.wire.SynchronousBridgingInterceptor.invoke(Sy
> nchronousBridgingInterceptor.java:41)
> at
> org.apache.tuscany.core.databinding.impl.DataBindingInteceptor.invoke
> (DataBindingInteceptor.java:70)
> at
> org.apache.tuscany.spi.wire.AbstractOutboundInvocationHandler.invoke(
> AbstractOutboundInvocationHandler.java:91)
> at
> org.apache.tuscany.core.wire.jdk.JDKCallbackInvocationHandler.invoke(
> JDKCallbackInvocationHandler.java:103)
> at $Proxy21.getGreetingsCallback(Unknown Source)
> at helloworld.HelloWorldImpl.getGreetings(HelloWorldImpl.java:43)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
> java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
> sorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at
> org.apache.tuscany.core.implementation.java.JavaTargetInvoker.invokeT
> arget(JavaTargetInvoker.java:90)
> at
> org.apache.tuscany.spi.extension.TargetInvokerExtension.invoke(Target
> InvokerExtension.java:67)
> at
> org.apache.tuscany.core.wire.InvokerInterceptor.invoke(InvokerInterce
> ptor.java:44)
> at
> org.apache.tuscany.core.databinding.impl.PassByValueInterceptor.invok
> e(PassByValueInterceptor.java:65)
> at
> org.apache.tuscany.core.wire.NonBlockingBridgingInterceptor$1.run(Non
> BlockingBridgingInterceptor.java:79)
> at
> org.apache.tuscany.core.services.work.jsr237.Jsr237WorkScheduler$Jsr2
> 37Work.run(Jsr237WorkScheduler.java:212)
> at
> org.apache.tuscany.core.services.work.jsr237.workmanager.ThreadPoolWo
> rkManager$DecoratingWork.run(ThreadPoolWorkManager.java:206)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExec
> utor.java:650)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
> .java:675)
> at java.lang.Thread.run(Thread.java:595)
> Caused by: java.lang.NullPointerException
> at
> org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(Internal
> OutputBuffer.java:746)
> at
> org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:433)
> at
> org.apache.coyote.http11.InternalOutputBuffer.flush(InternalOutputBuf
> fer.java:304)
> at
> org.apache.coyote.http11.Http11Processor.action(Http11Processor.java:
> 991)
> at org.apache.coyote.Response.action(Response.java:182)
> at
> org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:
> 322)
> at
> org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:29
> 3)
> at
> org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputSt
> ream.java:97)
> at
> sun.nio.cs.StreamEncoder$CharsetSE.implFlush(StreamEncoder.java:410)
> at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:152)
> at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:213)
> at java.io.BufferedWriter.flush(BufferedWriter.java:236)
> at
> com.ctc.wstx.sw.BufferingXmlWriter.flush(BufferingXmlWriter.java:184)
> at com.ctc.wstx.sw.BaseStreamWriter.flush(BaseStreamWriter.java:269)
> at
> org.apache.axiom.om.impl.MTOMXMLStreamWriter.flush(MTOMXMLStreamWrite
> r.java:119)
> at
> org.apache.axiom.om.impl.llom.OMNodeImpl.serializeAndConsume(OMNodeIm
> pl.java:412)
> at
> org.apache.axis2.transport.http.CommonsHTTPTransportSender.sendUsingO
> utputStream(CommonsHTTPTransportSender.java:275)
> at
> org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(Com
> monsHTTPTransportSender.java:209)
> at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:670)
> at
> org.apache.tuscany.binding.axis2.Axis2ServiceCallbackTargetInvoker.in
> vokeTarget(Axis2ServiceCallbackTargetInvoker.java:70)
> ... 23 more
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