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From Michael Noll <mich...@confluent.io>
Subject Re: puncutuate() never called
Date Fri, 07 Oct 2016 16:18:16 GMT
David,

punctuate() is still data-driven at this point, even when you're using the
WallClock timestamp extractor.

To use an example: Imagine you have configured punctuate() to be run every
5 seconds.  If there's no data being received for a minute, then punctuate
won't be called -- even though you probably would have expected this to
happen 12 times during this 1 minute.

(FWIW, there's an ongoing discussion to improve punctuate(), part of which
is motivated by the current behavior that arguably is not very intuitive to
many users.)

Could this be the problem you're seeing?  See also the related discussion
at
http://stackoverflow.com/questions/39535201/kafka-problems-with-timestampextractor
.






On Fri, Oct 7, 2016 at 6:07 PM, David Garcia <davidg@spiceworks.com> wrote:

> Hello, I’m sure this question has been asked many times.
> We have a test-cluster (confluent 3.0.0 release) of 3 aws m4.xlarges.  We
> have an application that needs to use the punctuate() function to do some
> work on a regular interval.  We are using the WallClock extractor.
> Unfortunately, the method is never called.  I have checked the
> filedescriptor setting for both the user as well as the process, and
> everything seems to be fine.  Is this a known bug, or is there something
> obvious I’m missing?
>
> One note, the application used to work on this cluster, but now it’s not
> working.  Not really sure what is going on?
>
> -David
>

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