I am running a test deployment of Kafka 0.8. When I configure sync producers to expect 2 acks for each "write" request, some of the producers get stuck. It looks like broker's response is not delivered back. This happened with original Kafka performance tools and with a test tool built using a custom C# client library. So I assume the issue is not on the client side. I checked the sources. Even if a replica broker does not catch up with a leader, a producer request should expire on time out. I don't see configuration parameter to set this timeout. The closest configuration setting I can see is "producer.purgatory.purge.interval.requests" but it is in the number of requests, not time units.
I would appreciate any advice where to look for the problem and how to solve it. Thank you, Michael Popov
