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https://issues.apache.org/jira/browse/MAPREDUCE-825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12740743#action_12740743
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Aaron Kimball commented on MAPREDUCE-825:
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Failures are in streaming only.
> JobClient completion poll interval of 5s causes slow tests in local mode
> ------------------------------------------------------------------------
>
> Key: MAPREDUCE-825
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-825
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Aaron Kimball
> Assignee: Aaron Kimball
> Priority: Minor
> Attachments: completion-poll-interval.patch, MAPREDUCE-825.2.patch
>
>
> The JobClient.NetworkedJob.waitForCompletion() method polls for job
> completion every 5 seconds. When running a set of short tests in
> pseudo-distributed mode, this is unnecessarily slow and causes lots of wasted
> time. When bandwidth is not scarce, setting the poll interval to 100 ms
> results in a 4x speedup in some tests. This interval should be parametrized
> to allow users to control the interval for testing purposes.
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