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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13123) Permit the default hadoop delegation token file format to be configurable
Date Tue, 10 May 2016 03:46:12 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15277559#comment-15277559

Allen Wittenauer commented on HADOOP-13123:

That's a very good question.  I suspect the answer is yes, which definitely means HADOOP-12563
should get pulled back from branch-2.

> Permit the default hadoop delegation token file format to be configurable
> -------------------------------------------------------------------------
>                 Key: HADOOP-13123
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13123
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Matthew Paduano
>            Assignee: Matthew Paduano
> If one environment updates to using the new dtutil code and accompanying Credentials
code, there is a backward compatibility issue with the default file format being JAVA.  Older
clients need to be updated to ask for a file in the legacy format (FORMAT_JAVA).  
> As an aid to users in this trap, we can add a configuration property to set the default
file format.  When set to FORMAT_JAVA, the new server code will serve up legacy files without
being asked.  The default value for this property will remain FORMAT_PB.  But affected users
can add this config option to the services using the newer code.

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