sumeetgajjar commented on a change in pull request #32114:
URL: https://github.com/apache/spark/pull/32114#discussion_r640288481



##########
File path: 
core/src/main/scala/org/apache/spark/storage/BlockManagerMasterEndpoint.scala
##########
@@ -422,7 +430,7 @@ class BlockManagerMasterEndpoint(
     val locations = blockLocations.get(blockId)
     if (locations != null) {
       locations.foreach { blockManagerId: BlockManagerId =>
-        val blockManager = blockManagerInfo.get(blockManagerId)
+        val blockManager = 
blockManagerInfo.get(blockManagerId).filter(_.isAlive)

Review comment:
       I will add the helper methods as they would clearly help to prevent 
accidental misses for `isAlive`.




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