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https://issues.apache.org/jira/browse/HDFS-1509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12933654#action_12933654
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Eli Collins commented on HDFS-1509:
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Isn't there a motivation for the Namenode no longer writing new edits to a
directory when it encounters an error while writing to a fs.name.dir directory?
eg that constantly try writing to a failed directory slows things down.
> Resync discarded directories in fs.name.dir during saveNamespace command
> ------------------------------------------------------------------------
>
> Key: HDFS-1509
> URL: https://issues.apache.org/jira/browse/HDFS-1509
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
>
> In the current implementation, if the Namenode encounters an error while
> writing to a fs.name.dir directory it stops writing new edits to that
> directory. My proposal is to make the namenode write the fsimage to all
> configured directories in fs.name.dir, and from then on, continue writing
> fsedits to all configured directories.
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