[GitHub] [spark] xuanyuanking commented on a change in pull request #25235: [WIP][SPARK-28483][Core] Fix canceling a spark job using barrier mode but barrier tasks do not exit

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xuanyuanking commented on a change in pull request #25235: [WIP][SPARK-28483][Core] Fix canceling a spark job using barrier mode but barrier tasks do not exit
URL: https://github.com/apache/spark/pull/25235#discussion_r306880454
 
 

 ##########
 File path: core/src/main/scala/org/apache/spark/rpc/RpcEndpointRef.scala
 ##########
 @@ -92,4 +92,18 @@ private[spark] abstract class RpcEndpointRef(conf: SparkConf)
     timeout.awaitResult(future)
   }
 
+  def askSyncWithInterruptCheck[T: ClassTag](
+      message: Any,
+      timeout: RpcTimeout,
+      interruptCheck: () => Unit): T = {
+    val future = ask[T](message, timeout)
+    while(!future.isCompleted) {
+      interruptCheck()
+      Thread.sleep(10)
 
 Review comment:
   ~~Um, so there still has the possibility(very unlikely) if the tasks are killed during the 10ms?~~
   Ignore this.

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