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Date: Tue, 5 Feb 2008 16:15:07 -0800 (PST)
From: "Konstantin Shvachko (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Resolved: (HADOOP-1188) processIOError() should update
 fstime file
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     [ https://issues.apache.org/jira/browse/HADOOP-1188?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Konstantin Shvachko resolved HADOOP-1188.
-----------------------------------------

       Resolution: Fixed
    Fix Version/s: 0.17.0

I just committed this.

> processIOError() should update fstime file
> ------------------------------------------
>
>                 Key: HADOOP-1188
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1188
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.10.1, 0.11.2, 0.12.2
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>            Priority: Blocker
>             Fix For: 0.16.1, 0.17.0
>
>         Attachments: hadoop-1188.patch
>
>
> 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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