Qunar Tech Salon

Jun 1, 2017 · Backend Development

Deep Dive into ZooKeeper ServerCnxn: Request Reception, Session Management, and Transaction Processing

This article explains how ZooKeeper’s ServerCnxn, particularly the NIOServerCnxn implementation, handles client connections, processes session creation, manages sessions via SessionTracker, and routes transaction requests through the server’s request‑processor chain, detailing the roles of each processor and the underlying logging and snapshot mechanisms.