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https://issues.apache.org/jira/browse/HADOOP-4480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12642801#action_12642801
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Runping Qi commented on HADOOP-4480:
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I think the map/reduce framework has to handling similar problems.
If a drive of a machine goes bad, the tasks on that machine tend to become
stragglers.
The overall performance will be impacted.
Overall, Hadoop is much better at handling total failure than partial failure
of nodes, I think it is better to decommission a bad node at a drive failure.
The admin may later choose to remove the drive from the configuration file and
restart the node, if he does not want to take away the node for repair.
> 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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