Github user aarondav commented on a diff in the pull request:
https://github.com/apache/spark/pull/299#discussion_r11327148
--- Diff: core/src/main/scala/org/apache/spark/SparkConf.scala ---
@@ -208,6 +210,26 @@ class SparkConf(loadDefaults: Boolean) extends
Cloneable with Logging {
new SparkConf(false).setAll(settings)
}
+ /** Checks for illegal or deprecated config settings. Throws an
exception for the former. */
+ private def validateSettings() {
+ if (settings.contains("spark.local.dir")) {
+ val msg = "In Spark 1.0 and later spark.local.dir will be overridden
by the value set by " +
+ "the cluster manager (via SPARK_LOCAL_DIRS in mesos/standalone and
LOCAL_DIRS in YARN)."
+ logWarning(msg)
+ }
+ val executorOptsKey = "spark.executor.extraJavaOptions"
+ settings.get(executorOptsKey).map { javaOpts =>
+ if (javaOpts.contains("-Dspark")) {
+ val msg = s"$executorOptsKey is not allowed to set Spark options.
Was '$javaOpts'"
+ throw new Exception(msg)
+ }
+ if (javaOpts.contains("-Xmx") || javaOpts.contains("-Xms")) {
+ val msg = s"$executorOptsKey is not allowed to alter memory
settings. Was '$javaOpts'"
+ throw new Exception(msg)
+ }
--- End diff --
This check is here because of the existence of spark.executor.memory. We
always set a value of Xmx and Xms when starting executors (a default if no
value specified), so this would conflict if the user adds these options.
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