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https://issues.apache.org/jira/browse/KAFKA-4533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15767243#comment-15767243
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Ismael Juma commented on KAFKA-4533:
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Thanks for the report. The requests are done in batches. We'd need more
information to understand the issue. Maybe you can attach more of the log?
> 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.
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