Kimahriman commented on PR #49107:
URL: https://github.com/apache/spark/pull/49107#issuecomment-2638350996
> > If so, how would this work on YARN? It looks like it will only use an
ephemeral port when running tests, I think YARN would also need to use an
ephemeral port?
>
> Yes, it will launch a Spark Connect server locally.
>
But if it uses the default 15002 port, it will hit issues when multiple
drivers are running on the same node, unless it uses an ephemeral port.
> This is the same as Py4J server. It does not enable the auth feature by
default. We could have the implementation in Spark Connect to but I would
prefer to run this separately.
Where is auth not enabled for Py4J? It looks like it always generates a
secret that the client uses to connect to it
https://github.com/apache/spark/blob/e2ef5a482604059197c79f1f7c305df4ce57213a/core/src/main/scala/org/apache/spark/api/python/Py4JServer.scala#L32
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