Github user neoremind commented on the issue:
https://github.com/apache/spark/pull/18964
Not yet since it is OK to keep buffer size as default system value, but to
keep it consistent as user would like to specify, this makes sense.
I also notice that Spark RPC by default uses java native serialization,
even a verifying endpoint exist or not request would cost 1K of payload size,
not to mention some other real logic endpoint, so in the real world it might be
useful to profile this, I suggest maybe providing more RPC monitoring log to or
hook would be beneficial, anyway this should be discussed in another thread.
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