Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/9859#issuecomment-159053620
I know that, but that's not what I'm asking about. I'm asking about all the
other code; why do you need to set `spark.yarn.keytab` for other backends?
I also agree with Tom that the authentication config value should come from
the hadoop configuration, and not be set explicitly like this. If you need to
set that, you're using the wrong configuration.
Also, I'm a little skeptic that this would work; anybody who has kerberos
auth for the Hive metastore probably has the same for HDFS, and while this
patch would make it work for local mode, it would not work for Standalone nor
Mesos.
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