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https://issues.apache.org/jira/browse/HDFS-4839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13848417#comment-13848417
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Steve Loughran commented on HDFS-4839:
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If this can be done in Java7 then its not worth doing here, unless a goal is to
backport behaviour to java6 runtimes.
Irrespective of how this is done, it changes the behaviour of local file://
operations when things fail. While this is probably a good thing, it may break
things. Perhaps it should just be catch+log for now: logging can only be useful.
In which case, this could maybe be implemented with reflection today
> add NativeIO#mkdirs, that provides an error message on failure
> --------------------------------------------------------------
>
> Key: HDFS-4839
> URL: https://issues.apache.org/jira/browse/HDFS-4839
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.1.0-beta
> Reporter: Colin Patrick McCabe
> Priority: Minor
>
> It would be nice to have a variant of mkdirs that provided an error message
> explaining why it failed. This would make it easier to debug certain failing
> unit tests that rely on mkdir / mkdirs-- the ChecksumFilesystem tests, for
> example.
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