[KAFKA-13245] KIP 771: Change behavior of how controller metrics are exposed when using KRaft.

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Ryan Dielhenn
• Reporter: Ryan Dielhenn
• Created: 27/Aug/21 20:55
• Updated: 21/Sep/21 00:03

Description

Pre-Kraft brokers expose 0 for controller metrics in the case of controller failover. KRaft brokers should not since they will never be elected as controller and since this would introduce a non-negligible performance impact. If a KRaft node is a "controller" process but is not the active controller it will expose 0 for all controller metrics since the process is eligible to become the active controller. This is consistent with behavior for controller-eligible nodes in a Kafka cluster using Zookeeper.

 

https://cwiki.apache.org/confluence/display/KAFKA/KIP+771%3A+KRaft+brokers+should+not+expose+controller+metrics

Issue Links

• links to: GitHub Pull Request #11290