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https://issues.apache.org/jira/browse/HADOOP-6520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12806534#action_12806534
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Owen O'Malley commented on HADOOP-6520:
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I'd flip the test around so that we don't load tokens if we are in the simple
authentication.
It also should leave the kerberos flag turned on even if there is a token file.
I'd also suggest changing the name to HADOOP_TOKEN_FILE and making it a static
final string constant.
> UGI should load tokens from the environment
> -------------------------------------------
>
> Key: HADOOP-6520
> URL: https://issues.apache.org/jira/browse/HADOOP-6520
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Owen O'Malley
> Attachments: h-6520.patch
>
>
> For MapReduce tasks, we need not only the task itself, but child processes to
> get the delegation tokens, therefore we need an environment variable that if
> set loads a token cache into the login UGI. The task tracker can set this
> property so that tasks (and child processes of the tasks, such as streaming
> and pipes) have the job's tokens automatically.
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