Still don't understand the difference. If it's not waiting for the ack then doesn't it make async? On Fri, Oct 17, 2014 at 12:55 PM, <gshap...@cloudera.com> wrote:
> Its using the sync producer without waiting for any broker to acknowledge > the write. This explains the lack of errors you are seeing. > > — > Sent from Mailbox > > On Fri, Oct 17, 2014 at 3:15 PM, Mohit Anchlia <mohitanch...@gmail.com> > wrote: > > > Little confused :) From one of the examples I am using property > > request.required.acks=0, > > I thought this sets the producer to be async? > > On Fri, Oct 17, 2014 at 11:59 AM, Gwen Shapira <gshap...@cloudera.com> > > wrote: > >> 0.8.1.1 producer is Sync by default, and you can set producer.type to > >> async if needed. > >> > >> On Fri, Oct 17, 2014 at 2:57 PM, Mohit Anchlia <mohitanch...@gmail.com> > >> wrote: > >> > Thanks! How can I tell if I am using async producer? I thought all the > >> > sends are async in nature > >> > On Fri, Oct 17, 2014 at 11:44 AM, Gwen Shapira <gshap...@cloudera.com > > > >> > wrote: > >> > > >> >> If you have "auto.create.topics.enable" set to "true" (default), > >> >> producing to a topic creates it. > >> >> > >> >> Its a bit tricky because the "send" that creates the topic can fail > >> >> with "leader not found" or similar issue. retrying few times will > >> >> eventually succeed as the topic gets created and the leader gets > >> >> elected. > >> >> > >> >> Is it possible that you are not getting errors because you are using > >> >> async producer? > >> >> > >> >> Also "no messages are delivered" can have many causes. Check if the > >> >> topic exists using: > >> >> bin/kafka-topics.sh --list --zookeeper localhost:2181 > >> >> > >> >> Perhaps the topic was created and the issue is elsewhere (the > consumer > >> >> is a usual suspect! perhaps look in the FAQ for tips with that issue) > >> >> > >> >> Gwen > >> >> > >> >> On Fri, Oct 17, 2014 at 12:56 PM, Mohit Anchlia < > mohitanch...@gmail.com > >> > > >> >> wrote: > >> >> > Is Kafka supposed to throw exception if topic doesn't exist? It > >> appears > >> >> > that there is no exception thrown even though no messages are > >> delivered > >> >> and > >> >> > there are errors logged in Kafka logs. > >> >> > >> >
