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https://issues.apache.org/jira/browse/HDFS-884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12885902#action_12885902
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Steve Loughran commented on HDFS-884:
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I have a more up to date version on my local git-managed SCM, I will chase it
down and post, though probably not until august, as I'm about to go on vacation
with no laptop for two weeks
> DataNode makeInstance should report the directory list when failing to start
> up
> -------------------------------------------------------------------------------
>
> Key: HDFS-884
> URL: https://issues.apache.org/jira/browse/HDFS-884
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: data-node
> Affects Versions: 0.22.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
> Fix For: 0.22.0
>
> Attachments: HDFS-884.patch, HDFS-884.patch
>
>
> When {{Datanode.makeInstance()}} cannot work with one of the directories in
> dfs.data.dir, it logs this at warn level (while losing the stack trace).
> It should include the nested exception for better troubleshooting. Then, when
> all dirs in the list fail, an exception is thrown, but this exception does
> not include the list of directories. It should list the absolute path of
> every missing/failing directory, so that whoever sees the exception can see
> where to start looking for problems: either the filesystem or the
> configuration.
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