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https://issues.apache.org/jira/browse/MAPREDUCE-2921?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13105487#comment-13105487
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Eli Collins commented on MAPREDUCE-2921:
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Eg if you've got a cluster with all hosts running and 10 hosts have failed
local dirs, if you restart the cluster these 10 hosts will not come up unless
you first unconfigure the failed directory from these hosts. However this
requires identifying these 10 hosts and modifiying just their config, which
admins don't want to do.
> TaskTracker won't start with failed local directory
> ---------------------------------------------------
>
> Key: MAPREDUCE-2921
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2921
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: tasktracker
> Affects Versions: 0.20.204.0
> Reporter: Eli Collins
>
> Chmod'ing one of the mapred local directories so it's not executable will
> cause the TT to fail to start. Doing this after the TT has started will
> result in a TT that is up but can not execute tasks.
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