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Posted to common-issues@hadoop.apache.org by "Daryn Sharp (Commented) (JIRA)" <ji...@apache.org> on 2012/01/04 17:13:39 UTC

[jira] [Commented] (HADOOP-7951) viewfs fails unless all mount points are available

    [ 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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