An unexpected RocketMQ alert revealed over 300 million queued messages, traced to identical clientIds generated by Docker host‑network containers; the article explains the root cause, examines clientId generation, load‑balancing logic, and provides a fix by customizing the clientId to prevent message backlog.
A deep dive into a massive RocketMQ message backlog reveals that identical clientIds generated in Docker host‑mode cause load‑balancing errors, and the article explains the root cause, code analysis, and a practical fix by customizing the clientId.
After a massive message backlog in RocketMQ, the author discovered that identical clientIds generated by Docker containers using host network mode caused broker load‑balancing errors, leading to slow consumption; the article explains the root cause, code analysis, and how setting a unique clientId resolves the issue.
This article explains ESB fundamentals such as subjectId, clientId, and key, describes how to configure test environments with topic prefixes, and provides detailed Telnet commands (count‑sub, list‑sub, list‑sender) plus Q&A for diagnosing message flow issues.
