[jira] [Created] (KAFKA-4533) subscribe() then poll() on new topic is very slow when subscribed to many topics

["Sergey Alaev (JIRA)" <ji...@apache.org>]

Sergey Alaev created KAFKA-4533:
-----------------------------------

             Summary: subscribe() then poll() on new topic is very slow when subscribed to many topics
                 Key: KAFKA-4533
                 URL: https://issues.apache.org/jira/browse/KAFKA-4533
             Project: Kafka
          Issue Type: Bug
          Components: clients
    Affects Versions: 0.10.1.0
            Reporter: Sergey Alaev


Given following case:

consumer.subscribe(my_new_topic, [249 existing topics])
publisher.send(my_new_topic, key, value)
poll(10) until data from my_new_topic arrives

I see data from `my_new_topic` only after approx. 90 seconds.

If I subscribe only to my_new_topic, I get results within seconds.

Logs contain lots of lines like this:

19:28:07.972 [kafka-thread] DEBUG org.apache.kafka.clients.consumer.internals.Fetcher - Resetting offset for partition demo.com_recipient-2-0 to earliest offset.
19:28:08.247 [kafka-thread] DEBUG org.apache.kafka.clients.consumer.internals.Fetcher - Fetched {timestamp=-1, offset=0} for partition demo.com_recipient-2-0

Probably you should do that in batch.




--
This message was sent by Atlassian JIRA
(v6.3.4#6332)