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From Mahendra Kariya <mahendra.kar...@go-jek.com>
Subject Re: Debugging Kafka Streams Windowing
Date Mon, 08 May 2017 03:57:47 GMT
Upgrading to 0.10.2.1 seems to have fixed the issue.

Until now, we were looking at random 1 hour data to analyse the issue. Over
the weekend, we have written a simple test that will continuously check for
inconsistencies in real time and report if there is any issue.

No issues have been reported for the last 24 hours. Will update this thread
if we find any issue.

Thanks for all the support!



On Fri, May 5, 2017 at 3:55 AM, Matthias J. Sax <matthias@confluent.io>
wrote:

> About
>
> > 07:44:08.493 [StreamThread-10] INFO o.a.k.c.c.i.AbstractCoordinator -
> > Discovered coordinator broker-05:6667 for group group-2.
>
> Please upgrade to Streams 0.10.2.1 -- we fixed couple of bug and I would
> assume this issue is fixed, too. If not, please report back.
>
> > Another question that I have is, is there a way for us detect how many
> > messages have come out of order? And if possible, what is the delay?
>
> There is no metric or api for this. What you could do though is, to use
> #transform() that only forwards each record and as a side task, extracts
> the timestamp via `context#timestamp()` and does some book keeping to
> compute if out-of-order and what the delay was.
>
>
> >>>  - same for .mapValues()
> >>>
> >>
> >> I am not sure how to check this.
>
> The same way as you do for filter()?
>
>
> -Matthias
>
>
> On 5/4/17 10:29 AM, Mahendra Kariya wrote:
> > Hi Matthias,
> >
> > Please find the answers below.
> >
> > I would recommend to double check the following:
> >>
> >>  - can you confirm that the filter does not remove all data for those
> >> time periods?
> >>
> >
> > Filter does not remove all data. There is a lot of data coming in even
> > after the filter stage.
> >
> >
> >>  - I would also check input for your AggregatorFunction() -- does it
> >> receive everything?
> >>
> >
> > Yes. Aggregate function seems to be receiving everything.
> >
> >
> >>  - same for .mapValues()
> >>
> >
> > I am not sure how to check this.
> >
>
>

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