On github actions the listener might take more time to finish, and add a comment

Author: holdenk

core/src/test/scala/org/apache/spark/deploy/DecommissionWorkerSuite.scala

@@ -242,8 +242,10 @@ class DecommissionWorkerSuite
       assert(jobResult === 2)
     }
     // 6 tasks: 2 from first stage, 2 rerun again from first stage, 2nd stage attempt 1 and 2.
-    val tasksSeen = listener.getTasksFinished()
-    assert(tasksSeen.size === 6, s"Expected 6 tasks but got $tasksSeen")
+    eventually(timeout(30.seconds), interval(10.seconds)) {
+      val tasksSeen = listener.getTasksFinished()
+      assert(tasksSeen.size === 6, s"Expected 6 tasks but got $tasksSeen")
+    }
   }
 
   private abstract class RootStageAwareListener extends SparkListener {

core/src/test/scala/org/apache/spark/storage/BlockManagerDecommissionIntegrationSuite.scala

@@ -188,6 +188,8 @@ class BlockManagerDecommissionIntegrationSuite extends SparkFunSuite with LocalS
 
     val execToDecommission = getCandidateExecutorToDecom.get
     logInfo(s"Decommissioning executor ${execToDecommission}")
+
+    // Decommission executor and ensure it is not relaunched by setting adjustTargetNumExecutors
     sched.decommissionExecutor(
       execToDecommission,
       ExecutorDecommissionInfo("", isHostDecommissioned = false),