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From nelson rivera <nelsonriver...@gmail.com>
Subject Re: Possible cause of nullPointerException in casmultiplier?
Date Fri, 25 Nov 2016 00:24:40 GMT
I continued investigating  and according to the stacktrace and source
code of of FSIndexRepositoryImpl.ll_addFS_common() the exception is
from line 2805 , in this part

final ArrayList<IndexIteratorCachePair<? extends FeatureStructure>>
indexes = this.indexArray[typeCode];
    // Add fsRef to all indexes.
    boolean noIndexOrOnlySetindexes = true;
for (IndexIteratorCachePair<? extends FeatureStructure> iicp :
indexes) {}     //here

apparently loop on a null value, any idea of why can happen this exception?

2016-11-24 16:27 GMT-05:00, nelson rivera <nelsonrivera12@gmail.com>:
> the error continue ocurring , this is the log, my casmultiplier is
> FileSystemMultiplerCas
>
> 04:04:17.520 - 23:
> cu.datys.xinetica.uima.core.FileSystemMultiplerCas.next(334): INFO:
> Adicionando annotation tipo cu.datys.xinetica.uima.ContinueOnFailure
> 04:04:17.522 - 23: org.apache.uima.util.CasPool.releaseCas: WARNING:
> The system tried to return a common analysis structure to the pool
> from which it was not checked out.
> 04:04:17.523 - 23:
> org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.callAnalysisComponentNext(549):
> SEVERE: Exception occurred
> org.apache.uima.analysis_engine.AnalysisEngineProcessException
> 	at
> cu.datys.xinetica.uima.core.FileSystemMultiplerCas.next(FileSystemMultiplerCas.java:351)
> 	at
> org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.callAnalysisComponentNext(PrimitiveAnalysisEngine_impl.java:526)
> 	at
> org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl$AnalysisComponentCasIterator.next(PrimitiveAnalysisEngine_impl.java:647)
> 	at
> org.apache.uima.aae.controller.PrimitiveAnalysisEngineController_impl.process(PrimitiveAnalysisEngineController_impl.java:860)
> 	at
> org.apache.uima.aae.handler.HandlerBase.invokeProcess(HandlerBase.java:121)
> 	at
> org.apache.uima.aae.handler.input.ProcessRequestHandler_impl.handleProcessRequestWithCASReference(ProcessRequestHandler_impl.java:795)
> 	at
> org.apache.uima.aae.handler.input.ProcessRequestHandler_impl.handle(ProcessRequestHandler_impl.java:1055)
> 	at
> org.apache.uima.aae.spi.transport.vm.UimaVmMessageListener.onMessage(UimaVmMessageListener.java:107)
> 	at
> org.apache.uima.aae.spi.transport.vm.UimaVmMessageDispatcher$1.run(UimaVmMessageDispatcher.java:70)
> 	at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 	at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 	at
> org.apache.uima.aae.UimaAsThreadFactory$1.run(UimaAsThreadFactory.java:132)
> 	at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.NullPointerException
> 	at
> org.apache.uima.cas.impl.FSIndexRepositoryImpl.ll_addFS_common(FSIndexRepositoryImpl.java:2805)
> 	at
> org.apache.uima.cas.impl.FSIndexRepositoryImpl.ll_addFS(FSIndexRepositoryImpl.java:2763)
> 	at
> org.apache.uima.cas.impl.FSIndexRepositoryImpl.addFS(FSIndexRepositoryImpl.java:2068)
> 	at
> org.apache.uima.cas.impl.FSIndexRepositoryImpl.addFS(FSIndexRepositoryImpl.java:2674)
> 	at org.apache.uima.cas.impl.CASImpl.addFsToIndexes(CASImpl.java:5023)
> 	at org.apache.uima.jcas.impl.JCasImpl.addFsToIndexes(JCasImpl.java:1525)
> 	at
> cu.datys.xinetica.uima.core.FileSystemMultiplerCas.next(FileSystemMultiplerCas.java:337)
>
>
> 2016-11-23 16:14 GMT-05:00, nelson rivera <nelsonrivera12@gmail.com>:
>> I have a aggregate service that contains in the flow in this order : 1
>> casmultiplier, then 2 primitive annotators and at the end other
>> casmultiplier.
>> The first casmultiplier receive a annotation with the path of a folder
>> and creates a new child cas for each file in the folder, the child cas
>> continue the flow in the other primitive annotators and at the end it
>> go to the second casmultipler, in the second casmultipler can or not
>> create new child cas, in the case of not, in the  method process() i
>> release de cas (aJCas.release();) directly in my source code.
>>
>> This aggregate service is deploys in uima-as and configure for
>> processing only one request at the same time <casPool
>> numberOfCASes="1"/>.  For any reason, sometimes and of aleatorie way ,
>> making many requests to the service from many thread concurrent, in
>> the first casmultiplier in method next() after get the new cas (JCas
>> jcas = getEmptyJCas()) and while populate the cas , apparently some
>> external component in another parallel thread modifys this obtained
>> cas, and i get a NullPointerException adding a annotation
>> (jcas.addFsToIndexes(copyOfFs);) in method next().
>>
>> Any idea of what may be going on?
>>
>> this is the descriptor uima-as:
>>
>>
>> <?xml version="1.0" encoding="UTF-8"?>
>> <analysisEngineDeploymentDescription
>>     xmlns="http://uima.apache.org/resourceSpecifier">
>>
>>     <name>XPlagiarismCheckerAggregateAE Deploy Descriptor</name>
>>     <description>Deploys XPlagiarismCheckerAggregateAE</description>
>>
>>     <deployment protocol="jms" provider="activemq">
>>         <service>
>>             <inputQueue endpoint="XPlagiarismCheckerAggregate"
>> brokerURL="${defaultBrokerURL}"/>
>>             <topDescriptor>
>>                 <import location="./XPlagiarismCheckerAggregate.xml"/>
>>             </topDescriptor>
>>             <analysisEngine inputQueueScaleout="2"
>> internalReplyQueueScaleout="3">
>>                 <delegates>
>>                     <analysisEngine key="FileSystemMultiplerCas">
>>                         <casMultiplier poolSize="6"/>
>>                     </analysisEngine>
>>                     <analysisEngine key="XFileFormatDetector">
>>                         <scaleout numberOfInstances="2"/>
>>                         <asyncAggregateErrorConfiguration>
>>                             <processCasErrors maxRetries="0"
>> continueOnRetryFailure="true"/>
>>                         </asyncAggregateErrorConfiguration>
>>                     </analysisEngine>
>>                     <analysisEngine key="XDataFileExtractor">
>>                         <scaleout numberOfInstances="2"/>
>>                         <asyncAggregateErrorConfiguration>
>>                             <processCasErrors maxRetries="0"
>> continueOnRetryFailure="true"/>
>>                         </asyncAggregateErrorConfiguration>
>>                     </analysisEngine>
>>                     <analysisEngine key="XTokenizer">
>>                         <scaleout numberOfInstances="2"/>
>>                         <asyncAggregateErrorConfiguration>
>>                             <processCasErrors maxRetries="0"
>> continueOnRetryFailure="true"/>
>>                         </asyncAggregateErrorConfiguration>
>>                     </analysisEngine>
>>                     <analysisEngine key="MergerBasePairCasMultipler">
>>                         <casMultiplier poolSize="2"/>
>>                     </analysisEngine>
>>                     <analysisEngine key="XPlagiarismChecker">
>>                         <scaleout numberOfInstances="2"/>
>>                         <asyncAggregateErrorConfiguration>
>>                             <processCasErrors maxRetries="0"
>> continueOnRetryFailure="true"/>
>>                         </asyncAggregateErrorConfiguration>
>>                     </analysisEngine>
>>                 </delegates>
>>             </analysisEngine>
>>         </service>
>>     </deployment>
>> </analysisEngineDeploymentDescription>
>>
>

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