pnowojski commented on a change in pull request #9772: [FLINK-14199] Only use 
dedicated/named classes for mailbox letters. 
URL: https://github.com/apache/flink/pull/9772#discussion_r328465893
 
 

 ##########
 File path: 
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/async/Emitter.java
 ##########
 @@ -89,13 +91,10 @@ public void run() {
                        while (running) {
                                LOG.debug("Wait for next completed async stream 
element result.");
                                AsyncResult asyncResult = 
streamElementQueue.peekBlockingly();
-                               executor.submit(() -> {
-                                       try {
-                                               output(asyncResult);
-                                       } catch (InterruptedException e) {
-                                               
Thread.currentThread().interrupt();
-                                       }
-                               }).get();
+                               executor.submit(namedCallable(() -> {
+                                       output(asyncResult);
+                                       return true;
+                               }, "AsyncWaitOperator/Emitter")).get();
 
 Review comment:
   nit: formatting 

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