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https://issues.apache.org/jira/browse/MAPREDUCE-4217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13266143#comment-13266143
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Siddharth Seth commented on MAPREDUCE-4217:
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Tom, this looks to be the same as MAPREDUCE-3809 - which went in a while ago.
Are you still seing the 3 second wait ?
> Task commit waits for up to 3 seconds
> -------------------------------------
>
> Key: MAPREDUCE-4217
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4217
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: task
> Affects Versions: 0.23.1
> Reporter: Tom White
> Assignee: Tom White
>
> Following MAPREDUCE-2450, TaskReporter#stopCommunicationThread may wait up to
> 3 seconds (the value of PROGRESS_INTERVAL) before it returns. This can be
> noticeable for short running tasks.
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