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From "Sreekanth Ramakrishnan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-5478) Provide a node health check script and run it periodically to check the node health status
Date Thu, 18 Jun 2009 09:59:07 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-5478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sreekanth Ramakrishnan updated HADOOP-5478:
-------------------------------------------

    Attachment: cluster_setup.pdf
                blacklist1.png
                active.png

Attaching documentation pdf incorporating documentation change.

Attaching screenshot listing UI changes.

> Provide a node health check script and run it periodically to check the node health status
> ------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-5478
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5478
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: mapred
>    Affects Versions: 0.20.0
>            Reporter: Aroop Maliakkal
>            Assignee: Sreekanth Ramakrishnan
>         Attachments: active.png, blacklist1.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 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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