Github user harishreedharan commented on the pull request:
https://github.com/apache/spark/pull/8867#issuecomment-142495294
Hmm, this might actually be due to a hadoop bug. Even with a login we add
tokens at the driver (in `Client.scala`) and I have hit this before -- when
there are tokens present in the credentials cache, the re-login does not seem
to help. The tokens still take precedence and an expired tokens exception is
thrown. I think this is the issue here.
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