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https://issues.apache.org/jira/browse/HADOOP-14843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16155948#comment-16155948
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Jason Lowe commented on HADOOP-14843:
-------------------------------------
I believe HADOOP-13508 triggered the behavior change from interpreting the
malformed argument as mode 0000 instead of mode 0777. However I wouldn't say
this bug was caused by that JIRA. The FsPermission string constructor was
accepting this malformed argument both before and after HADOOP-13508, and it
should have thrown an error in either case.
> FsPermission symbolic parsing failed to detect invalid argument
> ---------------------------------------------------------------
>
> Key: HADOOP-14843
> URL: https://issues.apache.org/jira/browse/HADOOP-14843
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.7.4, 2.8.1
> Reporter: Jason Lowe
> Assignee: Bharat Viswanadham
>
> A user misunderstood the syntax format for the FsPermission symbolic
> constructor and passed the argument "-rwr" instead of "u=rw,g=r". In 2.7 and
> earlier this was silently misinterpreted as mode 0777 and in 2.8 it oddly
> became mode 0000. In either case FsPermission should have flagged "-rwr" as
> an invalid argument rather than silently misinterpreting it.
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