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From Ewen Cheslack-Postava <e...@confluent.io>
Subject Re: Consumer Rebalancing Question
Date Thu, 05 Jan 2017 04:22:20 GMT
The coordinator will immediately move the group into a rebalance if it
needs it. The reason LeaveGroupRequest was added was to avoid having to
wait for the session timeout before completing a rebalance. So aside from
the latency of cleanup/committing offests/rejoining after a heartbeat,
rolling bounces should be fast for consumer groups.


On Wed, Jan 4, 2017 at 5:19 PM, Pradeep Gollakota <pradeepg26@gmail.com>

> Hi Kafka folks!
> When a consumer is closed, it will issue a LeaveGroupRequest. Does anyone
> know how long the coordinator waits before reassigning the partitions that
> were assigned to the leaving consumer to a new consumer? I ask because I'm
> trying to understand the behavior of consumers if you're doing a rolling
> restart.
> Thanks!
> Pradeep

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