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https://issues.apache.org/jira/browse/KAFKA-6650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16426161#comment-16426161
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ASF GitHub Bot commented on KAFKA-6650:
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gitlw opened a new pull request #4825: KAFKA-6650: Allowing transition to
OfflineReplica state for replicas without leadership info
URL: https://github.com/apache/kafka/pull/4825
A partially deleted topic can end up with some partitions having no
leadership info.
For the partially deleted topic, a new controller should be able to finish
the topic deletion
by transitioning the rogue partition's replicas to OfflineReplica state.
This patch adds logic to transition replicas to OfflineReplica state whose
partitions have
no leadership info.
Added a new test method to cover the partially deleted topic case.
### Committer Checklist (excluded from commit message)
- [ ] Verify design and implementation
- [ ] Verify test coverage and CI build status
- [ ] Verify documentation (including upgrade notes)
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> The controller should be able to handle a partially deleted topic
> -----------------------------------------------------------------
>
> Key: KAFKA-6650
> URL: https://issues.apache.org/jira/browse/KAFKA-6650
> Project: Kafka
> Issue Type: Bug
> Reporter: Lucas Wang
> Assignee: Lucas Wang
> Priority: Minor
>
> A previous controller could have deleted some partitions of a topic from ZK,
> but not all partitions, and then died.
> In that case, the new controller should be able to handle the partially
> deleted topic, and finish the deletion.
> In the current code base, if there is no leadership info for a replica's
> partition, the transition to OfflineReplica state for the replica will fail.
> Afterwards the transition to ReplicaDeletionStarted will fail as well since
> the only valid previous state for ReplicaDeletionStarted is OfflineReplica.
> Furthermore, it means the topic deletion will never finish.
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