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Fix WebSocket Disconnects, Handshake Failures and Idle Timeouts

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Self-Hosting & Infra intermediate 7 min read $0.01 Updated 2026-10-19

Debugging WebSocket problems: handshake 400/426/502 errors, nginx Upgrade headers, proxy_read_timeout idle disconnects, ping/pong heartbeats, load balancer stickiness, CDN limits, TLS mixed content and client reconnect backoff.

WebSockets fail to connect through a proxy, or drop every 60 seconds. Fix the Upgrade headers, idle timeouts, heartbeats, reconnect logic and load balancer settings.

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#websocket#nginx#proxy#real-time#troubleshooting

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