I set the property to 1 in the consumer code that is passed to
"createJavaConsumerConnector"
code, but it didn't seem to help
props.put("fetch.wait.max.ms", fetchMaxWait);
On Tue, Oct 21, 2014 at 1:21 PM, Guozhang Wang <wangg...@gmail.com> wrote:
> This is a consumer config:
>
> fetch.wait.max.ms
>
> On Tue, Oct 21, 2014 at 11:39 AM, Mohit Anchlia <mohitanch...@gmail.com>
> wrote:
>
> > Is this a parameter I need to set it in kafka server or on the client
> side?
> > Also, can you help point out which one exactly is consumer max wait time
> > from this list?
> >
> > https://kafka.apache.org/08/configuration.html
> >
> > On Tue, Oct 21, 2014 at 11:35 AM, Jay Kreps <jay.kr...@gmail.com> wrote:
> >
> > > There was a bug that could lead to the fetch request from the consumer
> > > hitting it's timeout instead of being immediately triggered by the
> > produce
> > > request. To see if you are effected by that set you consumer max wait
> > time
> > > to 1 ms and see if the latency drops to 1 ms (or, alternately, try with
> > > trunk and see if that fixes the problem).
> > >
> > > The reason I suspect this problem is because the default timeout in the
> > > java consumer is 100ms.
> > >
> > > -Jay
> > >
> > > On Tue, Oct 21, 2014 at 11:06 AM, Mohit Anchlia <
> mohitanch...@gmail.com>
> > > wrote:
> > >
> > > > This is the version I am using: kafka_2.10-0.8.1.1
> > > >
> > > > I think this is fairly recent version
> > > > On Tue, Oct 21, 2014 at 10:57 AM, Jay Kreps <jay.kr...@gmail.com>
> > wrote:
> > > >
> > > > > What version of Kafka is this? Can you try the same test against
> > trunk?
> > > > We
> > > > > fixed a couple of latency related bugs which may be the cause.
> > > > >
> > > > > -Jay
> > > > >
> > > > > On Tue, Oct 21, 2014 at 10:50 AM, Mohit Anchlia <
> > > mohitanch...@gmail.com>
> > > > > wrote:
> > > > >
> > > > > > It's consistently close to 100ms which makes me believe that
> there
> > > are
> > > > > some
> > > > > > settings that I might have to tweak, however, I am not sure how
> to
> > > > > confirm
> > > > > > that assumption :)
> > > > > > On Tue, Oct 21, 2014 at 8:53 AM, Mohit Anchlia <
> > > mohitanch...@gmail.com
> > > > >
> > > > > > wrote:
> > > > > >
> > > > > > > I have a java test that produces messages and then consumer
> > > consumers
> > > > > it.
> > > > > > > Consumers are active all the time. There is 1 consumer for 1
> > > > producer.
> > > > > I
> > > > > > am
> > > > > > > measuring the time between the message is successfully written
> to
> > > the
> > > > > > queue
> > > > > > > and the time consumer picks it up.
> > > > > > >
> > > > > > > On Tue, Oct 21, 2014 at 8:32 AM, Neha Narkhede <
> > > > > neha.narkh...@gmail.com>
> > > > > > > wrote:
> > > > > > >
> > > > > > >> Can you give more information about the performance test?
> Which
> > > > test?
> > > > > > >> Which
> > > > > > >> queue? How did you measure the dequeue latency.
> > > > > > >>
> > > > > > >> On Mon, Oct 20, 2014 at 5:09 PM, Mohit Anchlia <
> > > > > mohitanch...@gmail.com>
> > > > > > >> wrote:
> > > > > > >>
> > > > > > >> > I am running a performance test and from what I am seeing is
> > > that
> > > > > > >> messages
> > > > > > >> > are taking about 100ms to pop from the queue itself and
> hence
> > > > making
> > > > > > the
> > > > > > >> > test slow. I am looking for pointers of how I can
> troubleshoot
> > > > this
> > > > > > >> issue.
> > > > > > >> >
> > > > > > >> > There seems to be plenty of CPU and IO available. I am
> running
> > > 22
> > > > > > >> producers
> > > > > > >> > and 22 consumers in the same group.
> > > > > > >> >
> > > > > > >>
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
>
>
> --
> -- Guozhang
>
