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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-211) Provide a node health check script and run it periodically to check the node health status
Date Tue, 30 Jun 2009 18:34:47 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12725736#action_12725736

Allen Wittenauer commented on MAPREDUCE-211:

> Internal Yahoo! patch for the issue. 

Posting to the Internet sort of makes it not internal anymore. :(

> Provide a node health check script and run it periodically to check the node health status
> ------------------------------------------------------------------------------------------
>                 Key: MAPREDUCE-211
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-211
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>            Reporter: Aroop Maliakkal
>            Assignee: Sreekanth Ramakrishnan
>             Fix For: 0.21.0
>         Attachments: active.png, blacklist1.png, blacklist2.png, cluster_setup.pdf, hadoop-5478-1.patch,
hadoop-5478-2.patch, hadoop-5478-3.patch, hadoop-5478-4.patch, hadoop-5478-5.patch, hadoop-5478-6.patch,
mapred-211-common-3.patch, mapred-211-core-1.patch, mapred-211-internal.patch, mapred-211-mapred-1.patch,
mapred-211-mapred-2.patch, mapred-211-mapred-3.patch, mapred-211-mapred-4.patch, mapred-211-mapred-5.patch,
mapred-211-mapred-7.patch, mapred-211-mapred-8.patch, mapred-211-mapred-9.patch, MAPREDUCE-211-forrest.patch
> Hadoop must have some mechanism to find the health status of a node . It should run the
health check script periodically and if there is any errors, it should black list the node.
This will be really helpful when we run static mapred clusters. Else we may have to run some
scripts/daemons periodically to find the node status and take it offline manually.

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