I would like to maintain MCP server state persisted (sessionId)

Open

#738 opened on Dec 31, 2025 2 comments 3 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 5/5
Estimated time: Over a week
Newbie friendliness: 42/100

Issue type: Feature
Clarity: Mostly clear
Activity status: Stale
Tech stack: java, redis
Domain: backend, distributed-systems

Research direction

Start with HttpServletStreamableServerTransportProvider and inspect how session creation, validation, and the in-memory session map are handled. Define an extension point for custom session validation and persistence that works across multiple pods, with Redis or a database as the target; done means stateful sessions no longer depend on one process.

Written by the indexing model from the issue text.

Description

enhancement feature/session-storage P2

Now the session id is maintained in memory in a map. But since I have my MCP server multiple pods running, I would like the state to be persisted in redis or in a DB.

I would like to override the session Validator as a parameter in the HttpServletStreamableServerTransportProvider

Current Behavior

Currently only the session creation can be customised but not maintaining the state fully.

Context

I am not able to implement stateful session in a distributed setup

Dominant language: Java
Stars: 3.7k
Forks: 1.1k
Avg merge: 1d 15h
Merged PRs (30d): 9

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