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Posted to jira@kafka.apache.org by "Paul Dubuc (Jira)" <ji...@apache.org> on 2022/05/13 15:21:00 UTC
[jira] [Commented] (KAFKA-5074) Transition to OnlinePartition without preferred leader in ISR fails
[ https://issues.apache.org/jira/browse/KAFKA-5074?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17536721#comment-17536721 ]
Paul Dubuc commented on KAFKA-5074:
-----------------------------------
I see that this ticket is still open and unresolved. Is there a particular version of Kafka where this problem has been fixed? Or is there a workaround method for taking a node down that avoids this problem? Thanks.
> Transition to OnlinePartition without preferred leader in ISR fails
> -------------------------------------------------------------------
>
> Key: KAFKA-5074
> URL: https://issues.apache.org/jira/browse/KAFKA-5074
> Project: Kafka
> Issue Type: Bug
> Components: controller
> Affects Versions: 0.9.0.0
> Reporter: Dustin Cote
> Priority: Major
>
> Running 0.9.0.0, the controller can get into a state where it no longer is able to elect a leader for an Offline partition. It's unclear how this state is first achieved but in the steady state, this happens:
> -There are partitions with a leader of -1
> -The Controller repeatedly attempts a preferred leader election for these partitions
> -The preferred leader election fails because the only replica in the ISR is not the preferred leader
> The log cycle looks like this:
> {code}
> [2017-04-12 18:00:18,891] INFO [Controller 8]: Starting preferred replica leader election for partitions topic,1
> [2017-04-12 18:00:18,891] INFO [Partition state machine on Controller 8]: Invoking state change to OnlinePartition for partitions topic,1
> [2017-04-12 18:00:18,892] INFO [PreferredReplicaPartitionLeaderSelector]: Current leader -1 for partition [topic,1] is not the preferred replica. Trigerring preferred replica leader election (kafka.controller.PreferredReplicaPartitionLeaderSelector)
> [2017-04-12 18:00:18,893] WARN [Controller 8]: Partition [topic,1] failed to complete preferred replica leader election. Leader is -1 (kafka.controller.KafkaController)
> {code}
> It's not clear if this would happen on versions later that 0.9.0.0.
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