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https://issues.apache.org/jira/browse/HADOOP-12252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14704337#comment-14704337
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zhihai xu commented on HADOOP-12252:
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Currently {{savedLocalDirs}} at AllocatorPerContext is initialized as ""(empty
string). I think it seems reasonable to initialize {{dirDF}} and {{localDirs}}
as zero length array to match the initial value of {{savedLocalDirs}} and fix
the NPE. [~xgong], What do you think?
> LocalDirAllocator should not throw NPE with empty string configuration.
> ------------------------------------------------------------------------
>
> Key: HADOOP-12252
> URL: https://issues.apache.org/jira/browse/HADOOP-12252
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: zhihai xu
> Assignee: zhihai xu
> Priority: Minor
> Attachments: HADOOP-12252.000.patch
>
>
> LocalDirAllocator should not throw NPE with empty string configuration. When
> an empty string is configured, {{LocalDirAllocator}} will throw NPE. It will
> be better to throw IOException instead of NPE.
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