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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4103) Alert for missing blocks
Date Tue, 03 Mar 2009 02:05:56 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12678201#action_12678201
] 

Raghu Angadi commented on HADOOP-4103:
--------------------------------------

If there are no objections, I am planning to commit this to 0.20. 

This is a pretty useful feature for admins and is pretty safe patch. Please let me know if
there are concerns.


> Alert for missing blocks
> ------------------------
>
>                 Key: HADOOP-4103
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4103
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>    Affects Versions: 0.17.2
>            Reporter: Christian Kunz
>            Assignee: Raghu Angadi
>             Fix For: 0.20.0
>
>         Attachments: HADOOP-4103.patch, HADOOP-4103.patch, HADOOP-4103.patch, HADOOP-4103.patch
>
>
> A whole bunch of datanodes became dead because of some network problems resulting in
 heartbeat timeouts although datanodes were fine.
> Many processes started to fail because of the corrupted filesystem.
> In order to catch and diagnose such problems faster the namenode should detect the corruption
automatically and provide a way to alert operations. At the minimum it should show the fact
of corruption on the GUI.

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