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Posted to user@flink.apache.org by Harshvardhan Agrawal <ha...@gmail.com> on 2018/07/22 17:34:52 UTC

Triggers for late elements

Hello,

I am trying to understand the behaviour of Triggers in the case where we
receive late elements for a window. Does Flink always fires a window each
time it receives late element i.e. if I receive 10 late elements, would it
fire 10 times?
Is there any specific example I could refer to understand the how this
works?

-- 


*Regards,Harshvardhan Agrawal*

Re: Triggers for late elements

Posted by Hequn Cheng <ch...@gmail.com>.

Hi harshvardhan,

No, by default, late elements will be thrown away. There are documents
about window here[1].

Best, Hequn

[1]
https://ci.apache.org/projects/flink/flink-docs-master/dev/stream/operators/windows.html#windows


On Mon, Jul 23, 2018 at 1:34 AM, Harshvardhan Agrawal <
harshvardhan.agr93@gmail.com> wrote:

> Hello,
>
> I am trying to understand the behaviour of Triggers in the case where we
> receive late elements for a window. Does Flink always fires a window each
> time it receives late element i.e. if I receive 10 late elements, would it
> fire 10 times?
> Is there any specific example I could refer to understand the how this
> works?
>
> --
>
>
> *Regards,Harshvardhan Agrawal*
>