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From Biplob Biswas <revolutioni...@gmail.com>
Subject Re: Flink CEP not emitting timed out events properly
Date Fri, 16 Jun 2017 13:28:24 GMT
Hi Kostas,

Thanks for the reply, makes things a bit more clear.

Also, I went through this link and it is something similar I am trying to
observe. 
http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Listening-to-timed-out-patterns-in-Flink-CEP-td9371.html

I am checking for timed out events and when I am using event time, its
behaviour is non-deterministic. For one pattern it's generating a few
'matched events' and for a different pattern no 'matched events'. And almost
no timedout events in any of the patterns unless I run the series of mock
events a second time, during which I get a series of anomaly events. 

I had a topic created with this issue but I didn't get any satisfactory
solutions there, so was testing it with processing time whether it works
even or not. 

https://gist.github.com/revolutionisme/cf675ceee1492b93be020d4526bc9d38
https://gist.github.com/revolutionisme/38578e631f7a15f02cb2488f9fe56c76

I would really like to know how to increment the watermark without any
events coming in, such that at least the timedout events are emitted by the
system. 




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