[jira] [Commented] (MAPREDUCE-2764) Fix renewal of dfs delegation tokens

["Daryn Sharp (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13121330#comment-13121330 ] 

Daryn Sharp commented on MAPREDUCE-2764:
----------------------------------------

I misapplied the patches, so earlier comment is void.  A question: should the {{ContainerToken}} be renewing its token instead of using a {{TrivialTokenRenewer}}?
                
> Fix renewal of dfs delegation tokens
> ------------------------------------
>
>                 Key: MAPREDUCE-2764
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2764
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Daryn Sharp
>            Assignee: Owen O'Malley
>             Fix For: 0.20.205.0, 0.23.0
>
>         Attachments: MAPREDUCE-2764-2.patch, MAPREDUCE-2764-3.patch, MAPREDUCE-2764-4.patch, MAPREDUCE-2764.patch, delegation.patch, token-renew-trunk.patch, token-renew.patch, token-renew.patch
>
>
> The JT may have issues renewing hftp tokens which disrupt long distcp jobs.  The problem is the JT's delegation token renewal code is built on brittle assumptions.  The token's service field contains only the "ip:port" pair.  The renewal process assumes that the scheme must be hdfs.  If that fails due to a {{VersionMismatchException}}, it tries https based on another assumption that it must be hftp if it's not hdfs.  A number of other exceptions, most commonly {{IOExceptions}}, can be generated which fouls up the renewal since it won't fallback to https.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira