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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5643) Ability to blacklist tasktracker
Date Tue, 28 Apr 2009 20:48:30 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12703821#action_12703821
] 

Amar Kamat commented on HADOOP-5643:
------------------------------------

Also added a new parameter {{mapred.permissions.supergroup}} to allow admins specify supergroups.
Either the user running the jobtracker or user in the supergroup can issue admin commands.


> Ability to blacklist tasktracker
> --------------------------------
>
>                 Key: HADOOP-5643
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5643
>             Project: Hadoop Core
>          Issue Type: New Feature
>    Affects Versions: 0.20.0
>            Reporter: Rajiv Chittajallu
>            Assignee: Amar Kamat
>         Attachments: HADOOP-5643-v3.4.patch
>
>
> Its not always possible to shutdown the tasktracker to stop scheduling tasks on the node.
(eg you can't login to the node but the TT is up). 
> This can be via 
>   * mapred.exclude and should be refreshed with out restarting the tasktracker
>   * hadoop job -fail-tracker <tracker id>

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