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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9049) DelegationTokenRenewer needs to be Singleton and FileSystems should register/deregister to/from.
Date Thu, 15 Nov 2012 23:39:12 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13498446#comment-13498446
] 

Daryn Sharp commented on HADOOP-9049:
-------------------------------------

I need to look at this more, but you need to synch the getInstance, and call super in close().
                
> DelegationTokenRenewer needs to be Singleton and FileSystems should register/deregister
to/from.
> ------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9049
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9049
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 2.0.2-alpha
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: hadoop-9049.patch
>
>
> Currently, DelegationTokenRenewer is not singleton.
> Each filesystem using it spawns its own DelegationTokenRenewer. Also, they don't stop
the Renewer leading to other problems.
> A single DelegationTokenRenewer should be sufficient for all FileSystems.

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