Github user vanzin commented on the issue:
https://github.com/apache/spark/pull/19227
> so that's why I rename them. What do you think?
I think that should be a separate change. I don't think Mesos honors it
(and it shouldn't be, since IIRC it hasn't implemented long-lived app support
yet).
principal / keytab is for long lived apps that are expected to outlive the
token's TTL. Everybody else should be logging in to kerberos themselves, since
most of those users won't even have a keytab.
> Spark on Mesos also uses the same approach, does it also has same issue?
Mesos, like YARN, can provide the proper user isolation that standalone
cannot currently.
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