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From Marshall Schor <...@schor.com>
Subject Re: ConcurrentModificationException problems
Date Sat, 15 Oct 2011 05:09:17 GMT
This error can happen when you are running an iterator over some index, and are
perhaps inside the loop are adding Feature Structures to that same index.

>From the stack trace, I would suggest looking around line 127 in your
EnDicAnnotator, to see if you are perhaps adding a new FeatureStructure to the
indexes.

-Marshall


On 10/14/2011 7:09 PM, Xue-Feng Yang wrote:
> I have an annotator with a Set<String> variable which reads data in initialize(UimaContext)
from a file via parameter configuration in UimaContext. When debugging, it is OK at first
2 steps checks.contains(shingle) returned true. However, when called checks.contains(shingle)
at the 36th, it throws an exception 
>
>
> AnalysisEngineProcessException: Annotator processing failed
> Caused by: java.util.ConcurrentModificationException
> In my part of the code, after initialized, the variable is never modified and only the
method "contains" is called. I also tried to create the variable in
>
> Set<String> checks = Collections.synchronizedSet(new HashSet<String>());
>
>
> and not to test in JUnit, but the problem remains the same.
>
>
> After removing the code unit with "contains", it can go through.
>
> Any idea?
>
> Xue-Feng
>
> /////////////////////////////
>
> Oct 14, 2011 5:57:26 PM org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl
callAnalysisComponentProcess(405)
> SEVERE: Exception occurred
> org.apache.uima.analysis_engine.AnalysisEngineProcessException: Annotator processing
failed.    
>     at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.callAnalysisComponentProcess(PrimitiveAnalysisEngine_impl.java:391)
>     at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.processAndOutputNewCASes(PrimitiveAnalysisEngine_impl.java:295)
>     at org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(AnalysisEngineImplBase.java:267)
>     at org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(AnalysisEngineImplBase.java:280)
>     at com.norvar.uima.test.utils.TestUtils.runAE(TestUtils.java:48)
>     at com.norvar.uima.en_places.test.EnPlacesTest.testPlacesAE(EnPlacesTest.java:41)
>     at com.norvar.uima.en_places.test.EnPlacesTest.main(EnPlacesTest.java:20)
> Caused by: java.util.ConcurrentModificationException
>     at org.apache.uima.cas.impl.FSIndexRepositoryImpl$PointerIterator.checkConcurrentModification(FSIndexRepositoryImpl.java:246)
>     at org.apache.uima.cas.impl.FSIndexRepositoryImpl$PointerIterator.ll_get(FSIndexRepositoryImpl.java:537)
>     at org.apache.uima.cas.impl.FSIndexRepositoryImpl$PointerIterator.get(FSIndexRepositoryImpl.java:530)
>     at org.apache.uima.cas.impl.FSIteratorWrapper.get(FSIteratorWrapper.java:48)
>     at org.apache.uima.cas.impl.FSIteratorImplBase.next(FSIteratorImplBase.java:67)
>     at org.apache.uima.cas.impl.FSIteratorImplBase.next(FSIteratorImplBase.java:1)
>     at com.norvar.uima.en_dic.annotator.EnDicAnnotator.process(EnDicAnnotator.java:127)
>     at org.apache.uima.analysis_component.JCasAnnotator_ImplBase.process(JCasAnnotator_ImplBase.java:48)
>     at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.callAnalysisComponentProcess(PrimitiveAnalysisEngine_impl.java:377)
>     ... 6 more
> org.apache.uima.analysis_engine.AnalysisEngineProcessException: Annotator processing
failed.    
>     at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.callAnalysisComponentProcess(PrimitiveAnalysisEngine_impl.java:391)
>     at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.processAndOutputNewCASes(PrimitiveAnalysisEngine_impl.java:295)
>     at org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(AnalysisEngineImplBase.java:267)
>     at org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(AnalysisEngineImplBase.java:280)
>     at com.norvar.uima.test.utils.TestUtils.runAE(TestUtils.java:48)
>     at com.norvar.uima.en_places.test.EnPlacesTest.testPlacesAE(EnPlacesTest.java:41)
>     at com.norvar.uima.en_places.test.EnPlacesTest.main(EnPlacesTest.java:20)
> Caused by: java.util.ConcurrentModificationException
>     at org.apache.uima.cas.impl.FSIndexRepositoryImpl$PointerIterator.checkConcurrentModification(FSIndexRepositoryImpl.java:246)
>     at org.apache.uima.cas.impl.FSIndexRepositoryImpl$PointerIterator.ll_get(FSIndexRepositoryImpl.java:537)
>     at org.apache.uima.cas.impl.FSIndexRepositoryImpl$PointerIterator.get(FSIndexRepositoryImpl.java:530)
>     at org.apache.uima.cas.impl.FSIteratorWrapper.get(FSIteratorWrapper.java:48)
>     at org.apache.uima.cas.impl.FSIteratorImplBase.next(FSIteratorImplBase.java:67)
>     at org.apache.uima.cas.impl.FSIteratorImplBase.next(FSIteratorImplBase.java:1)
>     at com.norvar.uima.en_dic.annotator.EnDicAnnotator.process(EnDicAnnotator.java:127)
>     at org.apache.uima.analysis_component.JCasAnnotator_ImplBase.process(JCasAnnotator_ImplBase.java:48)
>     at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.callAnalysisComponentProcess(PrimitiveAnalysisEngine_impl.java:377)
>     ... 6 more

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