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From Chesnay Schepler <c.schep...@web.de>
Subject Re: Delay in Flink timers
Date Mon, 11 Sep 2017 17:38:51 GMT
It is true that onTimer and processElement are never called at the same 
time.

I'm not entirely sure whether there is any prioritization/fairness 
between these methods
(if not if could be that onTimer is starved) , looping in Aljoscha who 
hopefully knows more
about this.

On 10.09.2017 09:31, Narendra Joshi wrote:
> Hi,
>
> We are using Flink as a timer scheduler and delay in timer execution is
> a huge problem for us. What we have experienced is that as the number of
> Timers we register increases the timers start getting delayed (for more
> than 5 seconds). Can anyone point us in the right direction to figure
> out what might be happening?
>
> I have been told that `onTimer` and `processElement` are called with a
> mutually exclusive lock. Could this locking be the reason this is
> happening? In both the functions there is no IO happening and it should
> not take 5 seconds.
>
> Is it possible that calls to `processElement` starve `onTimer` calls?
>
>
> --
> Narendra Joshi
>


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