Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/299#discussion_r11567219
--- Diff:
yarn/common/src/main/scala/org/apache/spark/deploy/yarn/ClientBase.scala ---
@@ -340,8 +341,22 @@ trait ClientBase extends Logging {
JAVA_OPTS += " -XX:CMSIncrementalDutyCycle=10 "
}
- if (env.isDefinedAt("SPARK_JAVA_OPTS")) {
- JAVA_OPTS += " " + env("SPARK_JAVA_OPTS")
+
--- End diff --
Hm actually I'm not so sure. The existing behavior is really confusing
because it means that if SPARK_JAVA_OPTS is set on the executors and the
driver... the behavior is basically undefined. It might be worth it to bite the
bullet here rather than continue to support this unpredictable behavior for a
long time.
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