Github user sun-rui commented on the issue:
https://github.com/apache/spark/pull/14639
@zjffdu, yes, no need to download spark in yarn-client provided that
spark-submit is called to launch an R script. I just want to verify that your
change works in this case.
But note if yarn-client is used in Shell mode in a manual way (don not
reply on spark-submit), it is possible that spark needs to be downloaded.
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