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Brief disconnects don't have to destroy Socket.IO sessions. This guide shows how to enable connection state recovery, verify restored rooms and buffered packets, and handle expired windows or multi-node deployments.
I'm designing a repeatable development setup for a Socket.IO application (Node.js, socket.io 4.x) and trying to pin down the exact limits of connection state recovery before committing to an architecture. My understanding is that connectionStateRecovery is enabled by default and lets a client resume its session within maxDisconnectionDuration (default two mi
Goal I want clients that briefly lose connectivity to receive the events they missed and keep their room memberships after reconnecting, even if the Socket.IO server process restarts during the outage. Context and constraints Assume Socket.IO v4.6+ on both server and client, with connectionStateRecovery enabled and a configured maxDisconnectionDuration . As
nodejs
socketio