Github user uce commented on the issue:

    https://github.com/apache/flink/pull/2883
  
    I agree with the renaming you propose.
    
    I would not allow `flush()` to override the capacity limit as this has the 
potential to circumvent the capacity limit with a low latency `OutputFlusher`. 
Should we keep the `tryFlush` and `flush` differentiation or replace `flush` 
with `tryFlush`?
    
    ---
    
    I've tested this on a cluster and didn't run into problems. Before merging, 
I still need to add some unit tests though. Most probably, this will not make 
it to 1.1.4. 


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