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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1188) processIOError() should update fstime file
Date Mon, 02 Apr 2007 16:00:32 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12486055
] 

dhruba borthakur commented on HADOOP-1188:
------------------------------------------

+1. Sounds great.

> processIOError() should update fstime file
> ------------------------------------------
>
>                 Key: HADOOP-1188
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1188
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.10.1, 0.11.2, 0.12.2
>            Reporter: Konstantin Shvachko
>             Fix For: 0.13.0
>
>
> Name-node can have multiple directories to store the name space image and edits.
> During startup the name-node selects the latest image and reads it in memory.
> fstime stores the time of the latest checkpoint.
> If one of the directories becomes inaccessible during normal operation the name-node
> excludes it from the list, and never writes anything into it until restarted.
> Now if the the name-node restarts after excluding one of the directories, and if that
> excluded directory contained the latest image, then all modifications of the name space
> recorded in edits files in other directories starting from the moment the directory was
> excluded will be lost.
> We should update fstime in all remaining good directories after the exclusion.

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