Re: [eclipselink-users] Race conditions in EclipseLink runtime?

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Re: [eclipselink-users] Race conditions in EclipseLink runtime?

From: Laird Nelson <ljnelson@xxxxxxxxx>
Date: Wed, 5 May 2010 15:24:12 -0400
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On Wed, May 5, 2010 at 1:54 PM, Laird Nelson <ljnelson@xxxxxxxxx> wrote:

On Wed, May 5, 2010 at 1:30 PM, Tom Ware <tom.ware@xxxxxxxxxx> wrote:
> What are the syptoms of the failure? Is there an exception? Are
> results different? Is SQL not as expected?

Hello, Tom; thanks for the response.

The symptoms take one of two forms, and there doesn't seem to be rhyme
or reason about which error I'm likely to see.

The first is a complaint that a particular object used as a key in a
Map is null. I'll go into more detail in a subsequent email. Eclipse
throws an exception here. The next time it fails, I'll capture the
stack.

As promised:

javax.persistence.RollbackException: Exception [EclipseLink-6150] (Eclipse Persistence Services - 2.0.1.v20100213-r6600): org.eclipse.persistence.exceptions.ValidationException
Exception Description: A null value can not be used as a key in a container of type [class org.eclipse.persistence.indirection.IndirectMap]. Ensure your key values for the objects of type [class com.foobar.party.jpa.AtomicNameEntity] can not be null.
    at org.eclipse.persistence.internal.jpa.transaction.EntityTransactionImpl.commitInternal(EntityTransactionImpl.java:102)
    at org.eclipse.persistence.internal.jpa.transaction.EntityTransactionImpl.commit(EntityTransactionImpl.java:63)
    at com.foobar.party.jpa.TestCasePartyEntity.testInsert(TestCasePartyEntity.java:113)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at org.junit.runners.Suite.runChild(Suite.java:128)
    at org.junit.runners.Suite.runChild(Suite.java:24)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
    at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
    at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:165)
    at org.apache.maven.surefire.Surefire.run(Surefire.java:107)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:289)
    at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:1005)
Caused by: Exception [EclipseLink-6150] (Eclipse Persistence Services - 2.0.1.v20100213-r6600): org.eclipse.persistence.exceptions.ValidationException
Exception Description: A null value can not be used as a key in a container of type [class org.eclipse.persistence.indirection.IndirectMap]. Ensure your key values for the objects of type [class com.foobar.party.jpa.AtomicNameEntity] can not be null.
    at org.eclipse.persistence.exceptions.QueryException.mapKeyIsNull(QueryException.java:744)
    at org.eclipse.persistence.internal.queries.MapContainerPolicy.addInto(MapContainerPolicy.java:145)
    at org.eclipse.persistence.internal.queries.ContainerPolicy.addInto(ContainerPolicy.java:128)
    at org.eclipse.persistence.internal.queries.MapContainerPolicy.addInto(MapContainerPolicy.java:117)
    at org.eclipse.persistence.mappings.CollectionMapping.mergeIntoObject(CollectionMapping.java:1413)
    at org.eclipse.persistence.internal.descriptors.ObjectBuilder.mergeIntoObject(ObjectBuilder.java:2671)
    at org.eclipse.persistence.internal.descriptors.ObjectBuilder.mergeChangesIntoObject(ObjectBuilder.java:2620)
    at org.eclipse.persistence.internal.sessions.MergeManager.mergeChangesOfWorkingCopyIntoOriginal(MergeManager.java:599)
    at org.eclipse.persistence.internal.sessions.MergeManager.mergeChanges(MergeManager.java:263)
    at org.eclipse.persistence.mappings.ObjectReferenceMapping.mergeIntoObject(ObjectReferenceMapping.java:419)
    at org.eclipse.persistence.internal.descriptors.ObjectBuilder.mergeIntoObject(ObjectBuilder.java:2671)
    at org.eclipse.persistence.internal.descriptors.ObjectBuilder.mergeChangesIntoObject(ObjectBuilder.java:2620)
    at org.eclipse.persistence.internal.sessions.MergeManager.mergeChangesOfWorkingCopyIntoOriginal(MergeManager.java:599)
    at org.eclipse.persistence.internal.sessions.MergeManager.mergeChanges(MergeManager.java:263)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.mergeChangesIntoParent(UnitOfWorkImpl.java:3239)
    at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.mergeChangesIntoParent(RepeatableWriteUnitOfWork.java:293)
    at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.commitRootUnitOfWork(RepeatableWriteUnitOfWork.java:211)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitAndResume(UnitOfWorkImpl.java:1129)
    at org.eclipse.persistence.internal.jpa.transaction.EntityTransactionImpl.commitInternal(EntityTransactionImpl.java:84)
    ... 38 more

Best,
Laird

References:
- [eclipselink-users] Race conditions in EclipseLink runtime?
  - From: Laird Nelson
- Re: [eclipselink-users] Race conditions in EclipseLink runtime?
  - From: Tom Ware
- Re: [eclipselink-users] Race conditions in EclipseLink runtime?
  - From: Laird Nelson

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