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https://issues.apache.org/jira/browse/HADOOP-12252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14649478#comment-14649478
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zhihai xu commented on HADOOP-12252:
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[~xgong], Could you review the patch? Because the arrays {{dirDF}} and
{{localDirs}} are not initialized, NPE will happen when accessing the arrays'
length at above corner case. The fix is to initialize {{dirDF}} and
{{localDirs}} as zero length array, which should be safe I think. thanks
> 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
> 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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