Github user tgravescs commented on the pull request:
https://github.com/apache/spark/pull/8867#issuecomment-142596642
relogin from keytab should work past 7 days. as its a keytab not just
renewing tokens.
@SaintBacchus if you change dfs.namenode.delegation.token.renew-interval to
be smaller then max-life does it error out there or does it continue and only
at max-life fail?
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