[jira] Commented: (UIMA-1195) ConcurrentModificationException in CasCopier.copyCas()

["Thilo Goetz (JIRA)" <ui...@incubator.apache.org>]

    [ https://issues.apache.org/jira/browse/UIMA-1195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12636368#action_12636368 ] 

Thilo Goetz commented on UIMA-1195:
-----------------------------------

We'll need a test case.  Any takers?


> ConcurrentModificationException in CasCopier.copyCas()
> ------------------------------------------------------
>
>                 Key: UIMA-1195
>                 URL: https://issues.apache.org/jira/browse/UIMA-1195
>             Project: UIMA
>          Issue Type: Bug
>          Components: Core Java Framework
>            Reporter: Aaron Kaplan
>            Priority: Minor
>
> I get a ConcurrentModificationException in the last line of the following snippet:
> public class MovingImageMerger extends JCasMultiplier_ImplBase{
> 	public void process(JCas jcas) throws AnalysisEngineProcessException {
> 			if (resultJCas != null) throw new AnalysisEngineProcessException();
> 			resultJCas = getEmptyJCas();
> 			CasCopier.copyCas(jcas.getCas(), resultJCas.getCas(), true);
> Here is the stack trace:
> Caused by: java.util.ConcurrentModificationException
> 	at org.apache.uima.cas.impl.FSIndexRepositoryImpl$PointerIterator.checkConcurrentModification(FSIndexRepositoryImpl.java:264)
> 	at org.apache.uima.cas.impl.FSIndexRepositoryImpl$PointerIterator.checkConcurrentModificationAll(FSIndexRepositoryImpl.java:275)
> 	at org.apache.uima.cas.impl.FSIndexRepositoryImpl$PointerIterator.moveToNext(FSIndexRepositoryImpl.java:311)
> 	at org.apache.uima.cas.impl.FSIndexRepositoryImpl$PointerIterator.inc(FSIndexRepositoryImpl.java:541)
> 	at org.apache.uima.cas.impl.FSIteratorWrapper.moveToNext(FSIteratorWrapper.java:67)
> 	at org.apache.uima.cas.impl.FSIteratorImplBase.next(FSIteratorImplBase.java:48)
> 	at org.apache.uima.util.CasCopier.copyCasView(CasCopier.java:140)
> 	at org.apache.uima.util.CasCopier.copyCas(CasCopier.java:101)
> 	at eu.sapir.contentmanagement.video.MovingImageMerger.process(MovingImageMerger.java:55)
> 	at org.apache.uima.analysis_component.JCasMultiplier_ImplBase.process(JCasMultiplier_ImplBase.java:58)
> 	at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.callAnalysisComponentProcess(PrimitiveAnalysisEngine_impl.java:375)
> 	... 22 more
> A hint for constructing a test case: while debugging, I noticed that the last feature structure to be copied before the error was of a type that had erroneously been defined as a subtype of Annotation.  It's not a textual annotation, and its begin and end fields are left at 0.  After I changed the definition to make the type a subtype of TOP, the ConcurrentModificationException went away.

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