[KAFKA-10839] Improve consumer group coordinator unavailable message

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.8.0
• Assignee: Unassigned
• Reporter: Lucas Bradstreet
• Created: 10/Dec/20 22:11
• Updated: 15/Dec/20 22:38
• Resolved: 15/Dec/20 22:38

Description

When a consumer encounters an issue that triggers marking a coordinator as unknown, the error message it prints does not give context about the error that triggered it.

log.info("Group coordinator {} is unavailable or invalid, will attempt rediscovery", this.coordinator);

These may be triggered by response errors or the coordinator becoming disconnected. We should improve this error message to make the cause clear.

Issue Links

• links to: GitHub Pull Request #9729