mridulm commented on code in PR #40307:
URL: https://github.com/apache/spark/pull/40307#discussion_r1126939110


##########
core/src/main/scala/org/apache/spark/SparkContext.scala:
##########
@@ -596,6 +591,13 @@ class SparkContext(config: SparkConf) extends Logging {
       _conf.set(APP_ATTEMPT_ID, attemptId)
       _env.blockManager.blockStoreClient.setAppAttemptId(attemptId)
     }
+
+    // initialize after application id and attempt id has been initialized

Review Comment:
   Shuffle driver components typically depend on the application/attempt id for 
managing their metadata.
   Initializing it after these values are set in `SparkConcext` allows the 
`ShuffleDriverComponents` to rely on this - instead of using hacks like 
`SparkListener` waiting for application start, etc for the actual 
initialization.



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