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

["Guozhang Wang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-3096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guozhang Wang updated KAFKA-3096:
---------------------------------

*Reminder to the contributor / reviewer of the PR*: please note that the code deadline for 1.0.0 is less than 2 weeks away (Oct. 4th). Please re-evaluate your JIRA and see if it still makes sense to be merged into 1.0.0 or it could be pushed out to 1.1.0, or be closed directly if the JIRA itself is not valid any more, or re-assign yourself as contributor / committer if you are no longer working on the JIRA.

> 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
>              Labels: reliability
>             Fix For: 1.0.0
>
>
> 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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