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Current implementation of HttpServletStreamableServerTransportProvider or HttpServletSseServerTransportProvider needs strict stickyness

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#499 11 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
42/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
java
Domain
backend, distributed-systems

Research direction

Start with HttpServletStreamableServerTransportProvider.java around the in-memory session Map at line 108, then inspect HttpServletSseServerTransportProvider for the same session handling. Compare the proposed builder-provided Map and a session-management interface, and define which operations are required for replicated deployments without strict stickiness. Done means both servlet transports can use shared session state through a documented extension point.

Written by the indexing model from the issue text.

Description

enhancement feature/session-storage P2

Current implementations are holding mcp sessions into a in memory Map https://github.com/modelcontextprotocol/java-sdk/blob/713ee1add0e29d184224aabdf06d024ef30a2754/mcp/src/main/java/io/modelcontextprotocol/server/transport/HttpServletStreamableServerTransportProvider.java#L108
This make it mandatory to have strict stickyness "a la" browser" in a replicated/high availability environement which doesn't exist for agent (and we cannot rely on llm agents to implement this)
The feature could be

  • first very simple option an option for HttpServletStreamableServerTransportProvider.Builder to have an option to provide the map (then users can use different tools to have some shared Map)
  • create an interface to handle those sessions (with minimum operations such add, get. delete)
Dominant language
Java
Stars
3.7k
Forks
1.1k
Avg merge
1d 15h
Merged PRs (30d)
9

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