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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-6994) Api to get delegation token in AbstractFileSystem
Date Fri, 08 Apr 2011 21:25:05 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13017652#comment-13017652
] 

Suresh Srinivas commented on HADOOP-6994:
-----------------------------------------

# AbstractFileSystem.java
# #getDelegationTokens() - Javadoc says "Get a new delegation token for this file system.".
It would be good to explain it as "Get one or more delegations tokens associated with the
filesystem. Normally a file system returns a single delegation token. A file system that manages
multiple file systems underneath, could return set of delegation tokens for all the file systems
it manages."This comment applies to FileSystem also.
# When a file system returns multiple delegation tokens, how does renew and cancel work? Woudl
the file system know where to renew/cancel the token?


> Api to get delegation token in AbstractFileSystem
> -------------------------------------------------
>
>                 Key: HADOOP-6994
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6994
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Jitendra Nath Pandey
>            Assignee: Jitendra Nath Pandey
>         Attachments: HADOOP-6994.1.patch, HADOOP-6994.2.patch, HADOOP-6994.4.patch, HADOOP-6994.5.patch
>
>
> APIs to get delegation tokens is required in AbstractFileSystem. AbstractFileSystems
are accessed via file context therefore an API to get list of AbstractFileSystems accessed
in a path is also needed. 
> A path may refer to several file systems and delegation tokens could be needed for many
of them for a client to be able to successfully access the path. 

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