Github user sryza commented on a diff in the pull request:
https://github.com/apache/spark/pull/3409#discussion_r20752652
--- Diff: conf/spark-env.sh.template ---
@@ -40,6 +40,7 @@
# - SPARK_WORKER_OPTS, to set config properties only for the worker (e.g.
"-Dx=y")
# - SPARK_HISTORY_OPTS, to set config properties only for the history
server (e.g. "-Dx=y")
# - SPARK_DAEMON_JAVA_OPTS, to set config properties for all daemons (e.g.
"-Dx=y")
+# - SPARK_YARN_JAVA_OPTS, to set config properties for Yarn application
master (e.g. "-Dx=y")
--- End diff --
This section is for standalone deploy mode, and the options in this file
should only be for persistent services. I think we should omit adding an env
var entirely.
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