[jira] [Commented] (HADOOP-7352) FileSystem#listStatus should throw IOE upon access error

["Xiao Chen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-7352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15573335#comment-15573335 ] 

Xiao Chen commented on HADOOP-7352:
-----------------------------------

Thanks John for the new patch. Sorry I missed this earlier: we should also update FileSystem.java's {{listStatus}} javadoc to say it no longer returns null. +1 after that though.

Will let this float until next Tuesday to let [~stevel@apache.org], [~daryn] and other watchers take a look.

> 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
>
>
> 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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