Github user tgravescs commented on the pull request:
https://github.com/apache/spark/pull/7489#issuecomment-122947656
This is a long thread. so to summarize, you only see the issue with Spark
1.5 and you see it only in cluster mode whether you use kinit or specify
keytab/principal?
It looks like its coming from the call to YarnClientImpl.getNodeReports
which was just added in spark 1.5. But to call that it is creating a
YarnClient which yes may require RMdelegationtoken since in cluster mode that
is pretty much the same thing as trying to submit an application from running
an application like I mentioned that token is for.
I haven't run with 1.5 in a while so I will try it out and have a bit
closer look.
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