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Posted to dev@kafka.apache.org by "Onur Karaman (JIRA)" <ji...@apache.org> on 2017/04/18 16:41:41 UTC

[jira] [Created] (KAFKA-5083) always leave the last surviving member of the ISR in ZK

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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