Boyang Chen created KAFKA-8386: ---------------------------------- Summary: Use COORDINATOR_NOT_AVAILABLE to replace UNKNOWN_MEMBER_ID when the group is not available Key: KAFKA-8386 URL: https://issues.apache.org/jira/browse/KAFKA-8386 Project: Kafka Issue Type: Sub-task Reporter: Boyang Chen Assignee: Boyang Chen
When the group is dead or unavailable on the coordinator, current approach is to return `UNKNOWN_MEMBER_ID` to let the member reset generation and rejoin. It is not particularly safe for static members in this case, since resetting `member.id` could delay the detection for duplicate instance.id. Also considering the fact that group unavailability could mostly be caused by migration, it is favorable to trigger a coordinator rediscovery immediately than one more bounce. Thus, we decide to use `COORDINATOR_NOT_AVAILABLE` as top line citizen. -- This message was sent by Atlassian JIRA (v7.6.3#76005)