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Why Your MCP Server Loses Session State Behind a Load Balancer

DZone By Eshaan Jain Oct 8, 2026 · 11:00 AM 1 views 0 comments

Why Your MCP Server Loses Session State Behind a Load Balancer — Image: DZone

The Problem

The Model Context Protocol has an initialize handshake. A client connects, the server hands back an Mcp-Session-Id header, and every request after that carries the same ID.

That's fine with one server. It falls apart with three.

DZone Original story · dzone.com

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