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https://issues.apache.org/jira/browse/HADOOP-1983?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Owen O'Malley updated HADOOP-1983:
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Status: Patch Available (was: Open)
> jobs using pipes interface with tasks not using java output format have a
> good chance of not updating progress and timing out
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-1983
> URL: https://issues.apache.org/jira/browse/HADOOP-1983
> Project: Hadoop
> Issue Type: Bug
> Components: pipes
> Affects Versions: 0.15.0
> Reporter: Christian Kunz
> Assignee: Owen O'Malley
> Fix For: 0.15.0
>
> Attachments: pipe-flush.patch
>
>
> When using C++-pipes interface, mappers/reducers not emitting any key-values
> pairs, but running longer than 'mapred.task.timeout' might timeout even when
> they send periodical status updates upstream.
> The cause of the problem is that all upstream messages are buffered. Progress
> and status updates should be flushed immediately.
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