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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6988) Add support for reading multiple hadoop delegation token files
Date Tue, 05 Oct 2010 17:01:34 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12918073#action_12918073
] 

Allen Wittenauer commented on HADOOP-6988:
------------------------------------------

Grr.  I really wish we'd stop creating pet environment variables.  This is ridiculous.

Can we remove this env var as part of this JIRA?  What takes precendence the env var or the
mapreduce.job.credentials.binary jobconf setting?  What is the interaction?  If the answer
is "we have to look at the code" then we've failed.

It makes much more sense to have mapreduce.job.credentials.binary to support a comma delimited
set (to be consistent with the rest of the job conf.  Never mind that colon is the traditional
directory delimiter on OS X.)

> Add support for reading multiple hadoop delegation token files
> --------------------------------------------------------------
>
>                 Key: HADOOP-6988
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6988
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 0.22.0
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>
> It would be nice if there were a way to specify multiple delegation token files via the
HADOOP_TOKEN_FILE_LOCATION environment variable and the "mapreduce.job.credentials.binary"
configuration value. I suggest a colon-separated list of paths, each of which is read as a
separate delegation token file.

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