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Date: Sat, 21 Jan 2012 18:03:41 +0000 (UTC)
From: "Ben West (Commented) (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HADOOP-7943) DFS shell get/copy gives weird
 errors when permissions are wrong with directories
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    [ https://issues.apache.org/jira/browse/HADOOP-7943?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13190490#comment-13190490 ] 

Ben West commented on HADOOP-7943:
----------------------------------

Added a small patch. I am not sure how to run the unit tests (wiki says to use maven, but 1.0 appears to not use maven, so...) but I'm doubtful that it would affect anything.

I believe that the only reason the mkdirs() call could fail is permissions (so the second "if" is redundant), but it seemed like a could idea to check its return value anyway.

My first hadoop patch, so comments are appreciated :)

PS: Harsh: thanks for your help. FYI, at the bottom of your page you talk about both branches 0.1 and 1.0 - I was confused for a bit :)
                
> 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.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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