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https://issues.apache.org/jira/browse/DRILL-6172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16370874#comment-16370874
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ASF GitHub Bot commented on DRILL-6172:
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Github user sohami commented on the issue:
https://github.com/apache/drill/pull/1124
@parthchandra - Please help to review this PR
> setValueCount of VariableLengthVectors throws IOB exception when called with
> 0 value after clearing vectors
> -----------------------------------------------------------------------------------------------------------
>
> Key: DRILL-6172
> URL: https://issues.apache.org/jira/browse/DRILL-6172
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Sorabh Hamirwasia
> Assignee: Sorabh Hamirwasia
> Priority: Major
> Fix For: 1.13.0
>
>
> For VariableLengthVectors when we call *setValueCount* explicitly after
> clearing off the vector memory then it throws IOB exception. Normally
> *setValueCount* is not required to be called explicitly after clear, since
> getValueCount will return correct information. But if called it currently
> throws IOB which should not be the case.
> The reason being when clear is called then it releases both offsetVector and
> dataVector memory(or DrillByteBuf). Later when setValueCount is called then
> it tries to get current value in offset vector at that valueCount index and
> fails since the length of offset vector is zero. [Reference to
> code|https://github.com/apache/drill/blob/master/exec/vector/src/main/codegen/templates/VariableLengthVectors.java#L703].
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