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https://issues.apache.org/jira/browse/HADOOP-6027?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sreekanth Ramakrishnan updated HADOOP-6027:
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Attachment: hadoop-6027-1.patch
Attaching a patch which fixes this issue:
* Advancing the pointer in {{check_tt_root()}} function.
* Fixing a bug in {{MiniMRCluster}} which previous didnt use {{numDir}}
* Modified {{ClusterWithLinuxTaskController}} to always use 4 local directories.
> After HADOOP-5420, tasks hang when the taskcontroller.cfg has multiple
> entries for mapred.local.dir
> ---------------------------------------------------------------------------------------------------
>
> Key: HADOOP-6027
> URL: https://issues.apache.org/jira/browse/HADOOP-6027
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Vinod K V
> Attachments: hadoop-6027-1.patch
>
>
> HADOOP-5420 refactored code from taskcontroller.c -> check_tt_root() to
> configuration.c for reuse. While doing this, this bug got introduced because
> of which all tasks hang when a cluster is configured with multiple mapred
> local directories. This happens because of the latest code in check_tt_root()
> which never advances the mapred_local_dir pointer and gets stuck in an
> infinite loop.
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