dongjoon-hyun commented on a change in pull request #31876:
URL: https://github.com/apache/spark/pull/31876#discussion_r618068569



##########
File path: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
##########
@@ -1863,26 +1870,28 @@ private[spark] class DAGScheduler(
           // TODO: mark the executor as failed only if there were lots of 
fetch failures on it
           if (bmAddress != null) {
             val externalShuffleServiceEnabled = 
env.blockManager.externalShuffleServiceEnabled
-            val isHostDecommissioned = taskScheduler
-              .getExecutorDecommissionState(bmAddress.executorId)
-              .exists(_.workerHost.isDefined)
+            val isHostDecommissioned = execIdOpt.exists { execId =>
+              taskScheduler
+                .getExecutorDecommissionState(execId)
+                .exists(_.workerHost.isDefined)
+            }
 
-            // Shuffle output of all executors on host `bmAddress.host` may be 
lost if:
+            // Shuffle output of all executors on host `bmId.host` may be lost 
if:

Review comment:
       Shall we revert this? In this context, we have `bmAddress` instead of 
`bmId`, don't we?




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