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