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https://issues.apache.org/jira/browse/MAPREDUCE-4226?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tom White updated MAPREDUCE-4226:
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Attachment: MAPREDUCE-4226.patch
Here's a unit test to reproduce the problem, and a fix. The fix uses a
ConcurrentSkipListMap like we did in MAPREDUCE-3749/MAPREDUCE-3827.
> ConcurrentModificationException in FileSystemCounterGroup
> ---------------------------------------------------------
>
> Key: MAPREDUCE-4226
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4226
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.1
> Reporter: Tom White
> Assignee: Tom White
> Attachments: MAPREDUCE-4226.patch
>
>
> This was seen in a Hive job. I'll attach a failing test case.
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