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https://issues.apache.org/jira/browse/MAPREDUCE-7455?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18029133#comment-18029133
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ASF GitHub Bot commented on MAPREDUCE-7455:
-------------------------------------------
github-actions[bot] commented on PR #6093:
URL: https://github.com/apache/hadoop/pull/6093#issuecomment-3392652786
We're closing this stale PR because it has been open for 100 days with no
activity. This isn't a judgement on the merit of the PR in any way. It's just a
way of keeping the PR queue manageable.
If you feel like this was a mistake, or you would like to continue working
on it, please feel free to re-open it and ask for a committer to remove the
stale tag and review again.
Thanks all for your contribution.
> org.apache.hadoop.mapred.SpillRecord crashes due to overflow in buffer size
> computation
> ---------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-7455
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7455
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 3.3.6
> Reporter: ConfX
> Priority: Major
> Labels: pull-request-available
>
> A large `mapreduce.job.reduces` can cause overflow while computing the byte
> buffer in `org.apache.hadoop.mapred.SpillRecord#SpillRecord(int)`, since the
> byte buffer size equals to `mapreduce.job.reduces` *
> MapTask.MAP_OUTPUT_INDEX_RECORD_LENGTH
> To reproduce:
> 1. set `mapreduce.job.reduces` to 509103844
> 2. run `mvn surefire:test
> -Dtest=org.apache.hadoop.mapred.TestMapTask#testShufflePermissions`
> We create a PR that provides a fix by checking the computed buffer size is
> positive.
>
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