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chrislu
4e58592c0a
🎯 MASSIVE BREAKTHROUGH - Consumer Group Workflow Progressing ✅ FINDCOORDINATOR V0 FORMAT FIXED: - Removed v1+ fields (throttle_time, error_message) ✅ - Correct v0 format: error_code + node_id + host + port ✅ - Response size: 25 bytes (was 31 bytes) ✅ - kafka-go now accepts FindCoordinator response ✅ ✅ CONSUMER GROUP WORKFLOW SUCCESS: - Step 1: FindCoordinator ✅ WORKING - Step 2: JoinGroup ✅ BEING CALLED (API 11 v2) - Step 3: SyncGroup → Next to debug - Step 4: Fetch → Ready for messages 🔍 TECHNICAL BREAKTHROUGH: - kafka-go Reader successfully progresses from FindCoordinator to JoinGroup - JoinGroup v2 requests being received (190 bytes) - JoinGroup responses being sent (24 bytes) - Client retry pattern indicates JoinGroup response format issue 📊 EVIDENCE OF SUCCESS: - 'DEBUG: FindCoordinator response hex dump (25 bytes): 0000000100000000000000093132372e302e302e310000fe6c' - 'DEBUG: API 11 (JoinGroup) v2 - Correlation: 2, Size: 190' - 'DEBUG: API 11 (JoinGroup) response: 24 bytes, 10.417µs' - No more connection drops after FindCoordinator IMPACT: This establishes the complete consumer group discovery workflow. kafka-go Reader can find coordinators and attempt to join consumer groups. The foundation for full consumer group functionality is now in place. Next: Debug JoinGroup v2 response format to complete consumer group membership.