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From Tomoyuki Saito <aocch...@gmail.com>
Subject Re: KafkaProducer - Oversized batches
Date Mon, 09 Dec 2019 04:52:09 GMT
Hi Guozhang,

Thank you for your suggestion!
I'll create a JIRA within a few days and consider submitting a PR.

Thanks,
Tomoyuki

On 2019/12/09 00:37:49, Guozhang Wang <w...@gmail.com> wrote:
> Hello Tomoyuki,>
>
> It seems that issue in 6494 is indeed valid, and I'd personally suggest we>
> do option 3) to fix the flush() behavior. Please feel free to create a JIRA>
> (and also submit your PR if you are interested in contributing :).>
>
>
> Guozhang>
>
> On Sat, Dec 7, 2019 at 7:59 AM Tomoyuki Saito <ao...@gmail.com> wrote:>
>
> > Hi,>
> >>
> > ## Questions>
> >>
> > 1. Any possible way to make sure to avoid batch split, or oversized>
> > batches?>
> > 2. Any progress/discussion to fix the issue mentioned in the following>
> > PR: https://github.com/apache/kafka/pull/6469 (kafka#6469)>
> >>
> > ## Background>
> >>
> > `FlinkKafkaProducer` expects that callbacks for sent records will be>
> > executed after `KafkaProducer#flush`, while executing snapshot. But,>
> > it does not hold when batch split happens, as explained in PR>
> > kafka#6469. We are observing IllegalStateException for this issue,>
> > with Flink deployment.>
> >>
> > https://github.com/apache/flink/blob/release-1.9.1/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducer.java#L960>
> >>
> > We are looking for a workaround and a resolution for this issue.>
> >>
> > Possible workaround/resolution ideas:>
> > * Avoid batch split>
> > * Make Flink wait for inflight requests to be completed somehow>
> > * Make `KafkaProducer#flush` block until inflight requests are>
> > completed, even when batch split and reenqueue happens>
> >>
> > Thanks,>
> > Tomoyuki>
> >>
>
>
> -- >
> -- Guozhang>
>

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