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From "Aaron T. Myers (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4485) HDFS-347: DN should chmod socket path a+w
Date Sat, 09 Feb 2013 00:57:15 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4485?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13575013#comment-13575013
] 

Aaron T. Myers commented on HDFS-4485:
--------------------------------------

+1, I'm going to commit this momentarily.
                
> HDFS-347: DN should chmod socket path a+w
> -----------------------------------------
>
>                 Key: HDFS-4485
>                 URL: https://issues.apache.org/jira/browse/HDFS-4485
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>            Reporter: Todd Lipcon
>            Assignee: Colin Patrick McCabe
>            Priority: Critical
>         Attachments: HDFS-4485.001.patch, HDFS-4485.003.patch
>
>
> In cluster-testing HDFS-347, we found that in clusters where the MR job doesn't run as
the same user as HDFS, clients wouldn't use short circuit read because of a 'permission denied'
error connecting to the socket. It turns out that, in order to connect to a socket, clients
need write permissions on the socket file.
> The DN should set these permissions automatically after it creates the socket.

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