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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1983) jobs using pipes interface with tasks not using java output format have a good chance of not updating progress and timing out
Date Sat, 06 Oct 2007 12:23:52 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12532855
] 

Hudson commented on HADOOP-1983:
--------------------------------

Integrated in Hadoop-Nightly #263 (See [http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Nightly/263/])

> 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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