Xiao Chen commented on HADOOP-7352:

+1 to patch 5, committing.

> FileSystem#listStatus should throw IOE upon access error
> --------------------------------------------------------
>                 Key: HADOOP-7352
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7352
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>    Affects Versions: 2.6.0
>            Reporter: Matt Foley
>            Assignee: John Zhuge
>         Attachments: HADOOP-7352.001.patch, HADOOP-7352.002.patch, 
> HADOOP-7352.003.patch, HADOOP-7352.004.patch, HADOOP-7352.005.patch
> 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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