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https://issues.apache.org/jira/browse/HADOOP-1318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12601009#action_12601009
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Amareshwari Sriramadasu commented on HADOOP-1318:
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This issue requires to simulate lost task trackers. And cannot be simulated by
just killing the task trackers, because we have to make sure that one of the
maps running on the tasktrackers is complete. And the tasktracker is running
more tasks. Thus it is difficult to write a testcase for the issue. I simulated
the scenario on a cluster and tested the patch.
> Do not fail completed maps on lost tasktrackers if '-reducer NONE' is
> specified
> -------------------------------------------------------------------------------
>
> Key: HADOOP-1318
> URL: https://issues.apache.org/jira/browse/HADOOP-1318
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.12.3
> Reporter: Arun C Murthy
> Assignee: Amareshwari Sriramadasu
> Priority: Minor
> Fix For: 0.18.0
>
> Attachments: patch-1318.txt, patch-1318.txt
>
>
> If '-reducer NONE' is specified the map outputs directly go to hdfs, hence
> there is no reason to fail completed maps on 'lost' tasktrackers.
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