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https://issues.apache.org/jira/browse/UIMA-6243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17145764#comment-17145764
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Marshall Schor commented on UIMA-6243:
--------------------------------------
I see the same issue with the thatAnnotatorsCanLocallyUseDifferentJCasWrappers,
again, because in v3, the feature structure is made using the actual loaded
JCas class.
> JCas returns Annotation when asked for a specific subtype
> ---------------------------------------------------------
>
> Key: UIMA-6243
> URL: https://issues.apache.org/jira/browse/UIMA-6243
> Project: UIMA
> Issue Type: Bug
> Components: UIMA
> Affects Versions: 2.10.4SDK
> Reporter: Richard Eckart de Castilho
> Priority: Major
>
> In a specific classloader topology, a fully initialized JCas with theoretic
> access to the JCas wrappers of a given type will not return that type but
> instead returns an instance of {{Annotation}}. This leads to an exception
> like this:
> {code}
> org.apache.uima.analysis_engine.AnalysisEngineProcessException: Annotator
> processing failed.
> at
> org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.callAnalysisComponentProcess(PrimitiveAnalysisEngine_impl.java:427)
> at
> org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.innerCall(PrimitiveAnalysisEngine_impl.java:329)
> at
> org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.processAndOutputNewCASes(PrimitiveAnalysisEngine_impl.java:321)
> at
> org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(AnalysisEngineImplBase.java:269)
> at
> org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(AnalysisEngineImplBase.java:284)
> at
> org.apache.uima.cas.test.JCasClassLoaderTest.thatTypeSystemCanComeFromItsOwnClassLoader(JCasClassLoaderTest.java:126)
> ... snip ...
> Caused by: java.lang.ClassCastException: org.apache.uima.jcas.tcas.Annotation
> cannot be cast to org.apache.uima.cas.test.Token
> at java.util.Iterator.forEachRemaining(Iterator.java:116)
> at
> org.apache.uima.cas.test.JCasClassLoaderTest$FetchTheTokenAnnotator.process(JCasClassLoaderTest.java:166)
> 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:411)
> ... 28 more
> {code}
> Looks like this is a UIMAv2 issue only. When running the test against the
> UIMAv3 master (commit 0211057ad), I do not get any ClassCastException.
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