Hi everyone,

Based on what I know, a single operator with parallelism > 1 checks the 
watermarks from all its streams and uses the smallest one out of the non-idle 
streams. My first question is whether watermarks are forwarded as long as a 
different watermark strategy is not applied downstream? For example, will my 
stream keep its watermarks even after windowing + processing?

The second question is what happens with watermarks after connecting 2 streams, 
specifically these 2 possibilities:

- One stream was watermarks but the other one doesn't.
- Both streams have watermarks.

Regards,
Alexis.

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