Hi all,

I have below queries in flink. Could anyone help me to understand?

Query:

1 Is watermark maintained  globally at the operator level?

2 When we have a keyByOperator with parallelism >1, is there a single watermark 
maintained across all the parallel subtasks or for each of the parallel subtasks

3. Assuming I have a keybyoperator with parallelism > 1, is it possible to feed 
data to this operator from only one stream from the previous parameter (say map 
(1) always goes to window (1)

Regards,
Gnana

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