Lucene java.lang.IllegalAccessError

Tobias Horsmann

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Dec 17, 2015, 8:16:29 AM12/17/15

to dkpro-tc-dev

Hi,

when using a TC self-trained model I get a Lucene IllegalAccessError when using one of the Ngram-based feature extractors. (The Stacktrace is attached below)

The code did work before and I didn't change anything in my code either which gives me a hard time to track possible reasons for this exception.

I attempted to track this error by including this particular LuceneFeature into the save-load-model-test case we have in TC. The error does not occur there. This confirms that the FE seems to work basically, but makes it even harder to track the error in my particular case.

Anyone an idea what could cause this error?

The code of the feature (I use only one Lucene-Index Feature) looks like this. I personally see nothing here that would cause a problem?:

public class LuceneCharacterNGramPerUnitUFE extends LuceneCharacterNGramUFE

{

@Override

public List<Class<? extends MetaCollector>> getMetaCollectorClasses()

{

List<Class<? extends MetaCollector>> metaCollectorClasses = new ArrayList<Class<? extends MetaCollector>>();

metaCollectorClasses.add(LuceneCharacterNGramUnitMetaCollector.class);

return metaCollectorClasses;

}

@Override

protected void logSelectionProcess(long N) {

getLogger().log(Level.INFO, "+++ SELECTING THE " + N + " MOST FREQUENT CHARACTER NGRAMS");

}

Exception in thread "main" org.apache.uima.resource.ResourceInitializationException: Initialization of annotator class "de.tudarmstadt.ukp.dkpro.core.flextag.FlexTag" failed. (Descriptor: <unknown>)

at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.initializeAnalysisComponent(PrimitiveAnalysisEngine_impl.java:264)

at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.initialize(PrimitiveAnalysisEngine_impl.java:169)

at org.apache.uima.impl.AnalysisEngineFactory_impl.produceResource(AnalysisEngineFactory_impl.java:94)

at org.apache.uima.impl.CompositeResourceFactory_impl.produceResource(CompositeResourceFactory_impl.java:62)

at org.apache.uima.UIMAFramework.produceResource(UIMAFramework.java:279)

at org.apache.uima.UIMAFramework.produceAnalysisEngine(UIMAFramework.java:407)

at org.apache.uima.analysis_engine.asb.impl.ASB_impl.setup(ASB_impl.java:256)

at org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.initASB(AggregateAnalysisEngine_impl.java:429)

at org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.initializeAggregateAnalysisEngine(AggregateAnalysisEngine_impl.java:373)

at org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.initialize(AggregateAnalysisEngine_impl.java:186)

at org.apache.uima.impl.AnalysisEngineFactory_impl.produceResource(AnalysisEngineFactory_impl.java:94)

at org.apache.uima.impl.CompositeResourceFactory_impl.produceResource(CompositeResourceFactory_impl.java:62)

at org.apache.uima.UIMAFramework.produceResource(UIMAFramework.java:279)

at org.apache.uima.UIMAFramework.produceResource(UIMAFramework.java:331)

at org.apache.uima.UIMAFramework.produceAnalysisEngine(UIMAFramework.java:448)

at org.apache.uima.fit.factory.AnalysisEngineFactory.createEngine(AnalysisEngineFactory.java:205)

at org.apache.uima.fit.pipeline.SimplePipeline.runPipeline(SimplePipeline.java:85)

at de.unidue.langtech.runPosTagger.Run.main(Run.java:25)

Caused by: org.apache.uima.resource.ResourceInitializationException: Initialization of annotator class "de.tudarmstadt.ukp.dkpro.tc.ml.uima.TcAnnotatorSequence" failed. (Descriptor: <unknown>)