Github user ash211 commented on a diff in the pull request:
https://github.com/apache/spark/pull/3861#discussion_r22417818
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -998,7 +998,7 @@ class SparkContext(config: SparkConf) extends Logging
with ExecutorAllocationCli
*/
@DeveloperApi
override def requestExecutors(numAdditionalExecutors: Int): Boolean = {
- assert(master.contains("yarn") || dynamicAllocationTesting,
+ assert(master.contains("mesos") || master.contains("yarn") ||
dynamicAllocationTesting,
"Requesting executors is currently only supported in YARN mode")
--- End diff --
Change this message to be "... only supported in YARN or Mesos modes", and
the message below
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