pgandhi999 commented on a change in pull request #24035: [SPARK-27112] : Spark 
Scheduler encounters two independent Deadlocks …
URL: https://github.com/apache/spark/pull/24035#discussion_r264341921
 
 

 ##########
 File path: 
core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
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 @@ -111,6 +111,11 @@ class CoarseGrainedSchedulerBackend(scheduler: 
TaskSchedulerImpl, val rpcEnv: Rp
   private val reviveThread =
     ThreadUtils.newDaemonSingleThreadScheduledExecutor("driver-revive-thread")
 
+  // YSPARK-1163: This lock is explicitly added here to keep the changes 
introduced by SPARK-19757
 
 Review comment:
   Yep took care of that. Thank you.

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