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https://issues.apache.org/jira/browse/HADOOP-4480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12641662#action_12641662
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Konstantin Shvachko commented on HADOOP-4480:
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Does it make more sense for a node with a bad drive to go to decommissioning
mode?
The web UI can be modified to have 3 sections (live, dead and decommissioning
nodes) rather than just 2.
And the node can be still used for replication and read-only purposes.
> data node process should not die if one dir goes bad
> ----------------------------------------------------
>
> Key: HADOOP-4480
> URL: https://issues.apache.org/jira/browse/HADOOP-4480
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.18.1
> Reporter: Allen Wittenauer
>
> When multiple directories are configured for the data node process to use to
> store blocks, it currently exits when one of them is not writable. Instead,
> it should either completely ignore that directory or attempt to continue
> reading and then marking it unusable if reads fail.
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