[jira] Commented: (HADOOP-5643) Ability to blacklist tasktracker

["Owen O'Malley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-5643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12701383#action_12701383 ] 

Owen O'Malley commented on HADOOP-5643:
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I think we should also be able to do this via the web ui, which is very convenient. 

There should be a way to make it not black listed any more.

It should be persistent across job tracker restarts.

It probably should be decommissioning instead of black listing.

It should probably start rerunning all of the running and stored tasks. (including the map outputs that are stored there)

> 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
>
> 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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