[jira] [Commented] (KAFKA-3096) Leader is not set to -1 when it is shutdown if followers are down

["Matthias J. Sax (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-3096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16770603#comment-16770603 ] 

Matthias J. Sax commented on KAFKA-3096:
----------------------------------------

Moving all major/minor/trivial tickets that are not merged yet out of 2.2 release.

> Leader is not set to -1 when it is shutdown if followers are down
> -----------------------------------------------------------------
>
>                 Key: KAFKA-3096
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3096
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 0.9.0.0
>            Reporter: Ismael Juma
>            Assignee: Ismael Juma
>            Priority: Major
>              Labels: reliability
>             Fix For: 2.2.0
>
>
> Assuming a cluster with 2 brokers with unclear leader election disabled:
> 1. Start brokers 0 and 1
> 2. Perform partition assignment
> 3. Broker 0 is elected leader
> 4. Produce message and wait until metadata is propagated
> 6. Shutdown follower
> 7. Produce message
> 8. Shutdown leader
> 9. Start follower
> 10. Wait for leader election
> Expected: leader is -1
> Actual: leader is 0
> We have a test for this, but a bug in `waitUntilLeaderIsElectedOrChanged` means that `newLeaderOpt` is not being checked.



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