Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/4111#discussion_r23338741
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -379,6 +379,41 @@ class SparkContext(config: SparkConf) extends Logging
with ExecutorAllocationCli
}
executorAllocationManager.foreach(_.start())
+ // Use reflection to instantiate listeners specified via the
`spark.extraListeners` configuration
+ // or the SPARK_EXTRA_LISTENERS environment variable
+ try {
+ val listenerClassNames: Seq[String] = {
+ val fromSparkConf = conf.get("spark.extraListeners", "").split(',')
+ val fromEnvVar =
Option(conf.getenv("SPARK_EXTRA_LISTENERS")).getOrElse("").split(',')
--- End diff --
I see. I think at some point it would be nice to have a better long-term
solution for this kind of scenario. I added `SPARK_DIST_CLASSPATH` in #2982 for
similar reasons, but if we have something like "spark-dist.conf" in
`SPARK_CONF_DIR`, we could at some point merge those values with the user's
configuration and avoid adding more env variables like this.
Anyway, separate discussion.
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