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https://issues.apache.org/jira/browse/CARBONDATA-2991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Babulal updated CARBONDATA-2991:
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Attachment: Root_Cause_Find_Step.JPG
> NegativeArraySizeException during query execution
> --------------------------------------------------
>
> Key: CARBONDATA-2991
> URL: https://issues.apache.org/jira/browse/CARBONDATA-2991
> Project: CarbonData
> Issue Type: Bug
> Affects Versions: 1.4.0, 1.3.1
> Reporter: Babulal
> Assignee: Babulal
> Priority: Major
> Attachments: Root_Cause_Find_Step.JPG
>
>
> During Query Execution sometime NegativeArraySizeException Exception in Some
> Tasks . And sometime Executor is lost (JVM crash)
>
> ava.lang.NegativeArraySizeException at
> org.apache.carbondata.core.datastore.chunk.store.impl.unsafe.UnsafeVariableLengthDimesionDataChunkStore.getRow(UnsafeVariableLengthDimesionDataChunkStore.java:157)
> at
> org.apache.carbondata.core.datastore.chunk.impl.AbstractDimensionDataChunk.getChunkData(AbstractDimensionDataChunk.java:46)
> at
> org.apache.carbondata.core.scan.result.AbstractScannedResult.getNoDictionaryKeyArray(AbstractScannedResult.java:470)
> at
> org.apache.carbondata.core.scan.result.impl.NonFilterQueryScannedResult.getNoDictionaryKeyArray(NonFilterQueryScannedResult.java:102)
> at
> org.apache.carbondata.core.scan.collector.impl.DictionaryBasedResultCollector.collectData(DictionaryBasedResultCollector.java:101)
> at
> org.apache.carbondata.core.scan.processor.impl.DataBlockIteratorImpl.next(DataBlockIteratorImpl.java:51)
> at
> org.apache.carbondata.core.scan.processor.impl.DataBlockIteratorImpl.next(DataBlockIteratorImpl.java:32)
> at
> org.apache.carbondata.core.scan.result.iterator.DetailQueryResultIterator.getBatchResult(DetailQueryResultIterator.java:49)
>
>
>
> Issue Analysis :-
> Possible Root Cause :- It is because existing memoryblock is removed while it
> was in-use. This happened because duplicate taskid generated. Sometime freed
> same memory addresses are assigned to another task which will initialize
> memory block to0 and this cause NegativeSizeArrayException whereas sometime
> freed memory will not be used any task of executor process but running task
> will try to access it and as that address is not part of process so JVM crash
> will happen.
>
>
>
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