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https://issues.apache.org/jira/browse/RIVER-392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12995444#comment-12995444
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Patricia Shanahan commented on RIVER-392:
-----------------------------------------
The RIVER_392_sun1.txt failure appears to be a concurrency issue.
The NullPointerException line is:
locOut.writeObject(loc);
For that line to be the source of a NullPointerException, locOut must be null.
locOut is a private field in MarshalledInstanceOutputStream.
MarshalledInstanceOutputStream has one constructor, which initializes locOut
with the result of an object instantiation, which cannot be null. That is the
only assignment to locOut.
The implication is that that the constructor assignment to locOut did not
happen-before the use in writeAnnotation.
This specific problem could be fixed by making locOut final, but the different
exception in the previous failure suggests it is part of a pattern, not just an
isolated issue.
> NullPointerException in test job running
> com/sun/jini/test/impl/outrigger/matching/StressTestWithShutdown.td
> ------------------------------------------------------------------------------------------------------------
>
> Key: RIVER-392
> URL: https://issues.apache.org/jira/browse/RIVER-392
> Project: River
> Issue Type: Bug
> Components: com_sun_jini_outrigger
> Environment: Ubuntu on a VirtualBox under WindowsXP.
> Reporter: Patricia Shanahan
> Assignee: Patricia Shanahan
> Priority: Minor
> Attachments: RIVER_392_sun1.txt, StressTestWithShutdown.td
>
>
> Repeated running of the new version of
> com/sun/jini/test/impl/outrigger/matching/StressTestWithShutdown.td produces
> a NullPointerException in the test job about once every 4 hours:
> [java] =============================== CALLING RUN()
> ===============================
> [java]
> [java] java.lang.NullPointerException
> [java] at
> java.io.ObjectOutputStream.writeClassDescriptor(ObjectOutputStream.java:664)
> [java] at
> java.io.ObjectOutputStream.writeNonProxyDesc(ObjectOutputStream.java:1269)
> [java] at
> java.io.ObjectOutputStream.writeClassDesc(ObjectOutputStream.java:1227)
> [java] at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1411)
> [java] at
> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
> [java] at
> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
> [java] at
> com.sun.jini.jeri.internal.runtime.Util.marshalValue(Util.java:176)
> [java] at
> net.jini.jeri.BasicInvocationHandler.marshalArguments(BasicInvocationHandler.java:1182)
> [java] at
> net.jini.jeri.BasicInvocationHandler.invokeRemoteMethodOnce(BasicInvocationHandler.java:778)
> [java] at
> net.jini.jeri.BasicInvocationHandler.invokeRemoteMethod(BasicInvocationHandler.java:659)
> [java] at
> net.jini.jeri.BasicInvocationHandler.invoke(BasicInvocationHandler.java:528)
> [java] at com.sun.jini.outrigger.$Proxy1.write(Unknown Source)
> [java] at
> com.sun.jini.outrigger.SpaceProxy2.write(SpaceProxy2.java:296)
> [java] at
> com.sun.jini.test.impl.outrigger.matching.StressTest$WriteRandomEntryTask.spaceWrite(StressTest.java:582)
> [java] at
> com.sun.jini.test.impl.outrigger.matching.StressTest$WriteRandomEntryTask.run(StressTest.java:545)
> [java] at
> com.sun.jini.thread.TaskManager$TaskThread.run(TaskManager.java:331)
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