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From "Rose, Joseph" <Joseph.R...@childrens.harvard.edu>
Subject Subjects, already logged in, can't use them?
Date Thu, 04 Jun 2015 21:08:21 GMT

I’m trying to understand how Hadoop’s authentication architecture hangs
together. I already have a Subject with a Kerberos principal and
credentials, created programmatically using LoginContext. I’m using this
Subject to access other Kerberos-auth’ed services. Can I not use this
Subject (adding the right User principal so Hadoop will have its data) to
auth to Hadoop without having to log in again? What do I have to do to get
this Subject, or at least its principal, to work?

Thanks. I’m a little frustrated because it seems like it should be easier
than this.


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