[SPARK-22653] executorAddress registered in CoarseGrainedSchedulerBac…

https://issues.apache.org/jira/browse/SPARK-22653
executorRef.address can be null, pass the executorAddress which accounts for it being null a few lines above the fix.

Manually tested this patch. You can reproduce the issue by running a simple spark-shell in yarn client mode with dynamic allocation and request some executors up front. Let those executors idle timeout. Get a heap dump. Without this fix, you will see that addressToExecutorId still contains the ids, with the fix addressToExecutorId is properly cleaned up.

Author: Thomas Graves <tgraves@oath.com>

Closes #19850 from tgravescs/SPARK-22653.

core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala

@@ -182,7 +182,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
           addressToExecutorId(executorAddress) = executorId
           totalCoreCount.addAndGet(cores)
           totalRegisteredExecutors.addAndGet(1)
-          val data = new ExecutorData(executorRef, executorRef.address, hostname,
+          val data = new ExecutorData(executorRef, executorAddress, hostname,
             cores, cores, logUrls)
           // This must be synchronized because variables mutated
           // in this block are read when requesting executors