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. >>
