Kafka Consumer Rebalance Issues: 'Member Not Known' and 'I/O Timeout' Troubleshooting
Problem Description
When running Kafka consumers in production, you may encounter the following error patterns:
Client-side logs:
The provided member is not known in the current generation
i/o timeout
Server-side logs (broker):
[GroupCoordinator 0]: Sending empty assignment to member watermill-xxx of group-name for generation 14 with no errors ...
Posted on Sat, 06 Jun 2026 16:38:56 +0000 by dfego