Hi,

i have encounted a problem, i apply generate and assign watermark at the
datastream, and then keyBy, and  EventTimewindow and  apply window Function.

in the log, i can see that watermark and the eventtime with the message are
correct , and i think the situation bellow will trigger the window function
:

1、watermark Time >= window_end_time
2、there is data in [window_start_time,window_end_time)

i check the log , it is satisfied . and i try to apply the
trigger(CountTrigger.of(5)) Function and i can see in the log the
windowapply Function is invocked.

And i am doubt why is the windowapply Function can not be triggerd only by
the event time and watermark

thanks,
aitozi



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