Aitozi commented on issue #5058: [FLINK-5465] [streaming] Wait for pending 
timer threads to finish or …
URL: https://github.com/apache/flink/pull/5058#issuecomment-412350899
 
 
   Can i ask a question here? Why the code below in `StreamTask` can not make 
sure the processingTimer task are all been finished before the backend has been 
disposed? And need this PR to guarantee.   I ran into the same bug in flink 
1.3.2, but i cant quite understand does the `awaitPendingAfterQuiesce` don't 
work? @StefanRRichter 
    
   ```
   // make sure all timers finish
    timerService.awaitPendingAfterQuiesce();
   ```

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