holdenk commented on a change in pull request #29211:
URL: https://github.com/apache/spark/pull/29211#discussion_r465042119



##########
File path: 
core/src/test/scala/org/apache/spark/storage/BlockManagerDecommissionIntegrationSuite.scala
##########
@@ -266,18 +266,17 @@ class BlockManagerDecommissionIntegrationSuite extends 
SparkFunSuite with LocalS
     val execIdToBlocksMapping = storageStatus.map(
       status => (status.blockManagerId.executorId, status.blocks)).toMap
     // No cached blocks should be present on executor which was decommissioned
-    
assert(execIdToBlocksMapping(execToDecommission).keys.filter(_.isRDD).toSeq === 
Seq(),
+    assert(
+      !execIdToBlocksMapping.contains(execToDecommission) ||
+      execIdToBlocksMapping(execToDecommission).keys.filter(_.isRDD).toSeq === 
Seq(),
       "Cache blocks should be migrated")
     if (persist) {
       // There should still be all the RDD blocks cached
       assert(execIdToBlocksMapping.values.flatMap(_.keys).count(_.isRDD) === 
numParts)
     }
 
-    // Make the executor we decommissioned exit
-    sched.client.killExecutors(List(execToDecommission))
-
-    // Wait for the executor to be removed
-    executorRemovedSem.acquire(1)
+    // Wait for the executor to be removed automatically after migration.
+    assert(executorRemovedSem.tryAcquire(1, 5L, TimeUnit.MINUTES))

Review comment:
       So this is a high timeout because github actions seems to occasionally 
be very slow and I figured a higher value here was safer from a test 
reliability perpsective. I've normally seen these complete in under a minute on 
my machine. I think it's better to have the high timeout here given our 
multiple CI environments.




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