[GitHub] [spark] dongjoon-hyun commented on a change in pull request #28187: [SPARK-31422][CORE] Fix NPE when BlockManagerSource is used after BlockManagerMaster stops

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dongjoon-hyun commented on a change in pull request #28187: [SPARK-31422][CORE] Fix NPE when BlockManagerSource is used after BlockManagerMaster stops
URL: https://github.com/apache/spark/pull/28187#discussion_r407026183
 
 

 ##########
 File path: core/src/main/scala/org/apache/spark/storage/BlockManagerMaster.scala
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 @@ -167,10 +167,12 @@ class BlockManagerMaster(
    * amount of remaining memory.
    */
   def getMemoryStatus: Map[BlockManagerId, (Long, Long)] = {
+    if (driverEndpoint == null) return Map.empty
 
 Review comment:
   Although only `getStorageStatus` is used, I added the preventive code into `getMemoryStatus` together.

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