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From "Jitendra Nath Pandey (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7510) Tokens should use original hostname provided instead of ip
Date Thu, 08 Sep 2011 18:34:14 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13100551#comment-13100551
] 

Jitendra Nath Pandey commented on HADOOP-7510:
----------------------------------------------

> New tasks spawned after the ip change will fail.
Good point. The alternative approach doesn't work.

My concerns with the posted patch:
1) The use-case mentioned earlier (the contrived one) doesn't work.
2) The assumption about InetSocketAddress#getHostname is not a documented API behavior. Different
java implementations could do it differently.
3) This is a risky change.

  A safer approach, in my opinion, will be to make this change in a major release (e.g. 23)
where some backward compatibility constraints can probably be relaxed. That will allow us
a better fix using standard java api.

> Tokens should use original hostname provided instead of ip
> ----------------------------------------------------------
>
>                 Key: HADOOP-7510
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7510
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>             Fix For: 0.20.205.0
>
>         Attachments: HADOOP-7510-2.patch, HADOOP-7510-3.patch, HADOOP-7510.patch
>
>
> Tokens currently store the ip:port of the remote server.  This precludes tokens from
being used after a host's ip is changed.  Tokens should store the hostname used to make the
RPC connection.  This will enable new processes to use their existing tokens.

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