Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/18978
I'm inclined to build a general client-driver channel instead of a specific
client-AM channel. I'm not sure how many differences between two, but I did the
former before (without SASL), seems not so many codes.
My concern is that lately when we need to support a general client-driver
channel, then we need another refactoring to support this, why don't we do it
at beginning. This happened when I build a credential manager in YARN, but
later on mesos guy moved it to core, this moving bring in additional effort,
also left a regression in the code.
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