tillrohrmann commented on a change in pull request #6729: [FLINK-10386] 
[taskmanager] Remove legacy class TaskExecutionStateListener
URL: https://github.com/apache/flink/pull/6729#discussion_r222605330
 
 

 ##########
 File path: 
flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/tasks/StreamTaskTest.java
 ##########
 @@ -846,6 +817,23 @@ public void 
testSetsUserCodeClassLoaderForTimerThreadFactory() throws Throwable
        //  Test Utilities
        // 
------------------------------------------------------------------------
 
+       private static void waitUntilExecutionState(Task task, ExecutionState 
exceptedState, Deadline deadline) {
+               while (deadline.hasTimeLeft()) {
+                       if (exceptedState == task.getExecutionState()) {
+                               return;
+                       }
+
+                       try {
+                               
Thread.sleep(Math.min(deadline.timeLeft().toMillis(), 200));
 
 Review comment:
   Did you already addressed this comment @TisonKun? I agree with @Clarkkkkk 
that we should try to never do busy loop waiting.

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