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https://issues.apache.org/jira/browse/KAFKA-21227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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이선민 reassigned KAFKA-21227:
---------------------------
Assignee: 이선민
> Speed up ColdStartStickinessIntegrationTest
> -------------------------------------------
>
> Key: KAFKA-21227
> URL: https://issues.apache.org/jira/browse/KAFKA-21227
> Project: Kafka
> Issue Type: Test
> Components: streams, unit tests
> Reporter: 이선민
> Assignee: 이선민
> Priority: Minor
>
> The classic protocol case of ColdStartStickinessIntegrationTest takes about
> 73 seconds locally, while the streams protocol case takes about 23 seconds.
> After the first phase, the test closes both instances and waits for the
> consumer group to become empty before the cold restart. With the classic
> protocol, the stream threads do not leave the group on close, so the group
> only becomes empty after both members' sessions time out (45s). The broker
> logs show the members removed on heartbeat expiration about 44 seconds
> after the close, and the restart begins right after that.
> The streams protocol case is not affected, because dynamic members leave
> the group on close by default.
> We can close the first-phase instances with LEAVE_GROUP, as KAFKA-21149 did
> for JoinGracePeriodDurabilityIntegrationTest. Locally, this reduces the
> classic case to about 29 seconds, and the group still becomes empty before
> the cold restart.
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