Best Regards, Mario Juric Principal Engineer UNSILO.ai <http://unsilo.ai/> mobile: +45 3082 4100 skype: mario.juric.dk
Hi, Sorry for not posting the versions right away. This particular older setup runs with UIMA version 2.10.2 and Ruta 2.6.1. According to my source code CASImpl.ll_getFSRef is calling FeatureStructureImpl.toString when creating a CASRuntimeException at line 3653 as specified by the stack trace (UIMA core version 2.10.2). The exception is a CASRuntimeException.DEREF_FS_OTHER_CAS, which appears to happen when a feature structure reference is set to a FS that belongs to a completely different CAS. I am puzzled how that can happen inside a Ruta script that is applied to a single view only, and I am pretty sure we have nothing doing stuff across multiple CAS’ in our pipeline. We’ve only seen this exception in a Ruta context so far, but they are rare and not reproducible after a second run. Cheers Mario > On 11 Nov 2019, at 15:58 , Marshall Schor <m...@schor.com> wrote: > > This stack trace seems impossible, because the 3rd line shows > > CASImpl.ll_getFSRef calling a FeatureStructureImpl.toString method, which I > believe it doesn't do. > > -M > > On 11/11/2019 3:58 AM, Mario Juric wrote: >> Hi Peter, >> >> A while ago we started to get some erratic null pointer exceptions from Ruta >> because the type of some feature structure element is null (see stack trace >> below). The error is not consistently reproducible, in fact it seldomly >> occurs and when reprocessing the document it doesn’t happen again. We >> therefore think there are some race conditions at play when running in a >> multithreaded environment as we do in production, and I was hoping that >> maybe you would get an idea what might be causing it just by looking at the >> stack trace. >> >> Cheers >> Mario >> >> java.lang.NullPointerException at >> org.apache.uima.cas.impl.FeatureStructureImpl.prettyPrint(FeatureStructureImpl.java:501) >> at >> org.apache.uima.cas.impl.FeatureStructureImpl.prettyPrint(FeatureStructureImpl.java:483) >> at >> org.apache.uima.cas.impl.FeatureStructureImpl.toString(FeatureStructureImpl.java:472) >> at >> org.apache.uima.cas.impl.FeatureStructureImpl.toString(FeatureStructureImpl.java:467) >> at org.apache.uima.cas.impl.CASImpl.ll_getFSRef(CASImpl.java:3653) at >> org.apache.uima.cas.impl.FeatureStructureImpl.setFeatureValue(FeatureStructureImpl.java:61) >> at org.apache.uima.ruta.RutaStream.assignFeatureValue(RutaStream.java:1140) >> at org.apache.uima.ruta.RutaStream.assignFeatureValues(RutaStream.java:1020) >> at org.apache.uima.ruta.action.CreateAction.execute(CreateAction.java:74) at >> org.apache.uima.ruta.rule.AbstractRuleElement.apply(AbstractRuleElement.java:133) >> at >> org.apache.uima.ruta.rule.RuleElementCaretaker.applyRuleElements(RuleElementCaretaker.java:121) >> at >> org.apache.uima.ruta.rule.ComposedRuleElement.applyRuleElements(ComposedRuleElement.java:621) >> at >> org.apache.uima.ruta.rule.AbstractRuleElement.doneMatching(AbstractRuleElement.java:86) >> at >> org.apache.uima.ruta.rule.ComposedRuleElement.fallback(ComposedRuleElement.java:526) >> at >> org.apache.uima.ruta.rule.ComposedRuleElement.fallbackContinue(ComposedRuleElement.java:419) >> at >> org.apache.uima.ruta.rule.RutaRuleElement.startMatch(RutaRuleElement.java:103) >> at >> org.apache.uima.ruta.rule.ComposedRuleElement.startMatch(ComposedRuleElement.java:76) >> at org.apache.uima.ruta.rule.RutaRule.apply(RutaRule.java:63) at >> org.apache.uima.ruta.rule.RutaRule.apply(RutaRule.java:54) at >> org.apache.uima.ruta.rule.RutaRule.apply(RutaRule.java:36) at >> org.apache.uima.ruta.block.RutaScriptBlock.apply(RutaScriptBlock.java:67) at >> org.apache.uima.ruta.RutaModule.apply(RutaModule.java:56) at >> org.apache.uima.ruta.engine.RutaEngine.process(RutaEngine.java:561) 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:401) >> at >> org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.processAndOutputNewCASes(PrimitiveAnalysisEngine_impl.java:318) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(ASB_impl.java:570) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.<init>(ASB_impl.java:412) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl.process(ASB_impl.java:344) >> at >> org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.processAndOutputNewCASes(AggregateAnalysisEngine_impl.java:271) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(ASB_impl.java:570) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.<init>(ASB_impl.java:412) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl.process(ASB_impl.java:344) >> at >> org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.processAndOutputNewCASes(AggregateAnalysisEngine_impl.java:271) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(ASB_impl.java:570) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.<init>(ASB_impl.java:412) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl.process(ASB_impl.java:344) >> at >> org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.processAndOutputNewCASes(AggregateAnalysisEngine_impl.java:271) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.processUntilNextOutputCas(ASB_impl.java:570) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl$AggregateCasIterator.<init>(ASB_impl.java:412) >> at >> org.apache.uima.analysis_engine.asb.impl.ASB_impl.process(ASB_impl.java:344) >> at >> org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.processAndOutputNewCASes(AggregateAnalysisEngine_impl.java:271) >> at >> org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(AnalysisEngineImplBase.java:269) >> at >> org.apache.uima.collection.impl.cpm.engine.ProcessingUnit.processNext(ProcessingUnit.java:895) >> at >> org.apache.uima.collection.impl.cpm.engine.ProcessingUnit.run(ProcessingUnit.java:575) >> >> >> >> >> >> >> >> >> >> >> >> >> >> >
