Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/3082#discussion_r19779489
--- Diff:
core/src/main/scala/org/apache/spark/ExecutorAllocationManager.scala ---
@@ -124,6 +126,22 @@ private[spark] class ExecutorAllocationManager(sc:
SparkContext) extends Logging
throw new SparkException(s"spark.dynamicAllocation.minExecutors
($minNumExecutors) must " +
s"be less than or equal to spark.dynamicAllocation.maxExecutors
($maxNumExecutors)!")
}
+ // Verify that timeouts are positive
+ if (schedulerBacklogTimeout <= 0) {
+ throw new
SparkException(s"spark.dynamicAllocation.schedulerBacklogTimeout must be > 0!")
+ }
+ if (sustainedSchedulerBacklogTimeout <= 0) {
+ throw new SparkException(
+ s"spark.dynamicAllocation.sustainedSchedulerBacklogTimeout must be
> 0!")
+ }
+ if (executorIdleTimeout <= 0) {
+ throw new
SparkException(s"spark.dynamicAllocation.executorIdleTimeout must be > 0!")
+ }
+ // Verify that external shuffle service is enabled
+ if (!conf.getBoolean("spark.shuffle.service.enabled", false)) {
+ throw new SparkException(s"Dynamic allocation of executors requires
the external " +
+ s"shuffle service. You may enable this through
spark.shuffle.service.enabled.")
--- End diff --
(I guess you might want to allow people to still use the external shuffle
service even without dynamic allocation. But still we could be nice and
automatically use the external shuffle service when dynamic allocation is
enabled, without requiring the user to set both configs.)
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