Thanks Stephan. It was the case,.. I had an empty override of the 
processWatermark() in the operator that went unnoticed. Removing it fixed the 
problem.-roshan
    On Monday, August 12, 2019, 02:39:45 AM PDT, Stephan Ewen 
<se...@apache.org> wrote:  
 
 Do you know what part of the code happens to block off your watermark?
Maybe a method that is overridden in AbstractStreamOperator in your code?

On Sat, Aug 10, 2019 at 4:06 AM Roshan Naik <roshan_n...@yahoo.com.invalid>
wrote:

> Have streaming use cases where it is useful & easier to generate the
> watermark in the Source (via ctx.emitWatermark() ) and assign timestamps
> in a downstream custom operator which calls  output.collect(new
> StreamRecord<T>(msg, time)).
> When doing so, I see that the watermark reaches the downstream operator,
> but does not flow past it and consequently further downstream windows
> remain open. (I am using Flink 1.6).
> -roshan
>
>
  

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