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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-955) FSImage.saveFSImage can lose edits
Date Wed, 03 Mar 2010 01:15:27 GMT

    [ https://issues.apache.org/jira/browse/HDFS-955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12840415#action_12840415
] 

Todd Lipcon commented on HDFS-955:
----------------------------------

If I'm reading correctly, your solution is the same as my Option #4 [above|https://issues.apache.org/jira/browse/HDFS-955?focusedCommentId=12832706&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12832706]
right?

Are you already working on this or should I start work on a patch that implements this option?

> FSImage.saveFSImage can lose edits
> ----------------------------------
>
>                 Key: HDFS-955
>                 URL: https://issues.apache.org/jira/browse/HDFS-955
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.20.1, 0.21.0, 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Blocker
>         Attachments: hdfs-955-moretests.txt, hdfs-955-unittest.txt, PurgeEditsBeforeImageSave.patch
>
>
> This is a continuation of a discussion from HDFS-909. The FSImage.saveFSImage function
(implementing dfsadmin -saveNamespace) can corrupt the NN storage such that all current edits
are lost.

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