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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/01/18 10:01:44 UTC

[GitHub] [arrow] bogdanghit commented on pull request #9187: ARROW-11223: [Java] Fix: BaseVariableWidthVector/BaseLargeVariableWidthVector setNull and getBufferSizeFor is buggy, may get error java.lang.IndexOutOfBoundsException: index: 15880, length: 4 (expected: range(0, 15880))

bogdanghit commented on pull request #9187:
URL: https://github.com/apache/arrow/pull/9187#issuecomment-762134794


   To be specific, the issue is caused by the different allocated size of a validity buffer which is N/8 from the offset buffer (N+1)*OFFSET_WIDTH. When the ration of null versus non-null values is large and the offset buffer gets filled up before the validity buffer, the `getBufferSizeFor` call will trigger the overflow error.  It is quite easy to reproduce.
   


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