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> add the ability to create multiple UGIs/subjects from one kerberos login
> ------------------------------------------------------------------------
>
> Key: HADOOP-13081
> URL: https://issues.apache.org/jira/browse/HADOOP-13081
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Sergey Shelukhin
>
> We have a scenario where we log in with kerberos as a certain user for some
> tasks, but also want to add tokens to the resulting UGI that would be
> specific to each task. We don't want to authenticate with kerberos for every
> task.
> I am not sure how this can be accomplished with the existing UGI interface.
> Perhaps some clone method would be helpful, similar to createProxyUser minus
> the proxy stuff; or it could just relogin anew from ticket cache.
> getUGIFromTicketCache seems like the best option in existing code, but there
> doesn't appear to be a consistent way of handling ticket cache location - the
> above method, that I only see called in test, is using a config setting that
> is not used anywhere else, and the env variable for the location is not set
> on all paths - trying to find the correct ticket cache and setting it in the
> config for getUGIFromTicketCache seems even hackier than doing the clone via
> reflection ;)
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