ConcurrentModificationException in CasCopier.copyCas()
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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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