Onur Karaman created KAFKA-5083:
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Summary: always leave the last surviving member of the ISR in ZK
Key: KAFKA-5083
URL: https://issues.apache.org/jira/browse/KAFKA-5083
Project: Kafka
Issue Type: Sub-task
Reporter: Onur Karaman
Assignee: Onur Karaman
Currently we erase ISR membership if the replica to be removed from the ISR is
the last surviving member of the ISR and unclean leader election is enabled for
the corresponding topic.
We should investigate leaving the last replica in ISR in ZK, independent of
whether unclean leader election is enabled or not. That way, if people
re-disabled unclean leader election, we can still try to elect the leader from
the last in-sync replica.
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