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From "Daryn Sharp (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7951) viewfs fails unless all mount points are available
Date Wed, 04 Jan 2012 16:13:39 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13179595#comment-13179595
] 

Daryn Sharp commented on HADOOP-7951:
-------------------------------------

One possible/conceptual approach is viewfs issues a virtual-token.  The real token for the
underlying mount point of a path would be dynamically acquired on-demand and cached.  The
viewfs token's renewer would need to be aware of these cached tokens so the renew/cancel methods
operate on all acquired tokens.  The UGI would need to be updated to allow the ipc client
to locate the tokens.
                
> viewfs fails unless all mount points are available
> --------------------------------------------------
>
>                 Key: HADOOP-7951
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7951
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs, security
>    Affects Versions: 0.24.0, 0.23.1
>            Reporter: Daryn Sharp
>            Priority: Critical
>
> Obtaining a delegation token via viewfs will attempt to acquire tokens from all filesystems
in the mount table.  All clients that obtain tokens, including job submissions, will fail
if any of the mount points are unavailable -- even if paths in the unavailable mount will
not be accessed.

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