length field bug

Wukong Talks Architecture

Oct 25, 2024 · Backend Development

Debugging a TCP Communication Bug That Stops Device Production at 70% Due to Length Field Misalignment

The article details a mysterious production stall at 70% caused by a TCP packet length field misalignment when the configuration name is "rabbit‑TD", explains the step‑by‑step investigation using server logs and packet captures, identifies the root cause of the merged D4/D5 packets, and proposes two concrete fixes to correct the length handling.