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https://issues.apache.org/jira/browse/HADOOP-7352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14280227#comment-14280227
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Steve Loughran commented on HADOOP-7352:
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HDFS & the FS spec do effectively require an IOE of some form to be raised here.
Localfs does return null if a list operation fails due to an invalid path or
other access problem. This is a bug: it must be escalated to an IOE for
consistency with everything else.
If someone were to write a patch I'd review it.
> Contracts of LocalFileSystem and DistributedFileSystem should require
> FileSystem::listStatus throw IOException not return null upon access error
> ------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-7352
> URL: https://issues.apache.org/jira/browse/HADOOP-7352
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs, fs/s3
> Reporter: Matt Foley
> Assignee: Matt Foley
>
> In HADOOP-6201 and HDFS-538 it was agreed that FileSystem::listStatus should
> throw FileNotFoundException instead of returning null, when the target
> directory did not exist.
> However, in LocalFileSystem implementation today, FileSystem::listStatus
> still may return null, when the target directory exists but does not grant
> read permission. This causes NPE in many callers, for all the reasons cited
> in HADOOP-6201 and HDFS-538. See HADOOP-7327 and its linked issues for
> examples.
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