Github user mccheah commented on the pull request:
https://github.com/apache/spark/pull/4106#issuecomment-75856584
Spark only needs to read the specific keytab for the HDFS Namenode. It does
not need to read any arbitrary keytab. I'm pushing a commit that makes this
explicit in the Spark configuration as opposed to inferring the credentials
from the Hadoop configuration.
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