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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-955) FSImage.saveFSImage can lose edits
Date Fri, 02 Apr 2010 17:50:28 GMT

    [ https://issues.apache.org/jira/browse/HDFS-955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12852889#action_12852889
] 

Suresh Srinivas commented on HDFS-955:
--------------------------------------

+1 for the patch. BTW thanks for documenting various directories under  storage directories.
It adds more clarity to the code, save namespace, upgrade mechanisms.

> 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: Konstantin Shvachko
>            Priority: Blocker
>         Attachments: FSStateTransition7.htm, hdfs-955-moretests.txt, hdfs-955-unittest.txt,
PurgeEditsBeforeImageSave.patch, saveNamespace-0.20.patch, saveNamespace-0.21.patch, saveNamespace.patch,
saveNamespace.patch, saveNamespace.patch, saveNamespace.patch, saveNamespace.txt
>
>
> 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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