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From "Doug Cutting (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8139) Path does not allow metachars to be escaped
Date Fri, 09 Mar 2012 20:46:57 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13226437#comment-13226437
] 

Doug Cutting commented on HADOOP-8139:
--------------------------------------

Note that even when things are made to work again on Windows after this change it will still
be an incompatible change, since programs that created Paths with backslashes won't work the
same.  This may be well warranted, but it should still be documented as an incompatible change.
                
> Path does not allow metachars to be escaped
> -------------------------------------------
>
>                 Key: HADOOP-8139
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8139
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.23.0, 0.24.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Blocker
>         Attachments: HADOOP-8139-2.patch, HADOOP-8139-3.patch, HADOOP-8139.patch, HADOOP-8139.patch
>
>
> Path converts "\" into "/", probably for windows support?  This means it's impossible
for the user to escape metachars in a path name.  Glob expansion can have deadly results.
> Here are the most egregious examples. A user accidentally creates a path like "/user/me/*/file".
 Now they want to remove it.
> {noformat}"hadoop fs -rmr -skipTrash '/user/me/\*'" becomes...
> "hadoop fs -rmr -skipTrash /user/me/*"{noformat}
> * User/Admin: Nuked their home directory or any given directory
> {noformat}"hadoop fs -rmr -skipTrash '\*'" becomes...
> "hadoop fs -rmr -skipTrash /*"{noformat}
> * User:  Deleted _everything_ they have access to on the cluster
> * Admin: *Nukes the entire cluster*
> Note: FsShell is shown for illustrative purposes, however the problem is in the Path
object, not FsShell.

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