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

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0.0
• Labels: reliability
• Assignee: Ismael Juma
• Reporter: Ismael Juma
• Reviewer: Guozhang Wang
• Created: 13/Jan/16 16:11
• Updated: 15/Nov/19 02:59
• Resolved: 15/Nov/19 02:59

Description

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.

Issue Links

• links to: GitHub Pull Request #765
• links to: GitHub Pull Request #3031