[jira] [Updated] (HADOOP-7943) DFS shell get/copy gives weird errors when permissions are wrong with directories

["Ben West (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-7943?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ben West updated HADOOP-7943:
-----------------------------

    Attachment: hadoop-7943-1.0v3.patch

Patch includes tests for copying a directory and copying a single file. Also had to refactor the shell class to expose error messages.
                
> DFS shell get/copy gives weird errors when permissions are wrong with directories
> ---------------------------------------------------------------------------------
>
>                 Key: HADOOP-7943
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7943
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.20.205.0
>            Reporter: Ben West
>            Priority: Minor
>              Labels: hdfs, shell
>         Attachments: hadoop-7943-1.0.0.patch, hadoop-7943-1.0.0v2.patch, hadoop-7943-1.0v3.patch, hadoop-7943.patch, hadoop-7943.patch
>
>
> Let /foo be a *directory* in HDFS (issue does not occur with files) and /bar be a local dir. Do something like:
> {code}
> $ chmod u-w /bar
> $ hadoop -get /foo/myfile /bar
> copyToLocal: Permission denied  # correctly tells me permission is denied
> $ hadoop -get /foo /bar
> copyToLocal: null           
> $ hadoop -get /foo/ /bar
> copyToLocal: No such file or directory
> {code}
> I've been banging my head for a bit trying to figure out why hadoop thinks my directory doesn't exist, but it turns out the problem was just with my local permissions. The "Permission denied" error would've been a lot nicer to get.

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