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https://issues.apache.org/jira/browse/HADOOP-5643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amar Kamat updated HADOOP-5643:
-------------------------------

    Fix Version/s: 0.21.0
     Release Note: Added the functionality to refresh jobtrackers node list via 
command line (bin/hadoop mradmin -refreshNodes). The command should be run as 
the jobtracker owner (jobtracker process owner) or from a super group 
(mapred.permissions.supergroup). 

> 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
>             Fix For: 0.21.0
>
>         Attachments: HADOOP-5643-v3.4.patch, HADOOP-5643-v4.0.patch, 
> HADOOP-5643-v4.6.patch, HADOOP-5643-v5.1.patch, 
> HADOOP-5643-v5.12-testcase.patch, HADOOP-5643-v5.12.patch, 
> HADOOP-5643-v5.5.patch, HADOOP-5643-v5.9.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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