Title: Add idle session timeout to StreamableHTTPSessionManager by felixweinberger · Pull Request #2022 · modelcontextprotocol/python-sdk · GitHub
Open Graph Title: Add idle session timeout to StreamableHTTPSessionManager by felixweinberger · Pull Request #2022 · modelcontextprotocol/python-sdk
X Title: Add idle session timeout to StreamableHTTPSessionManager by felixweinberger · Pull Request #2022 · modelcontextprotocol/python-sdk
Description: Port of #1994 (v1.x) to main. Motivation and Context Sessions created via StreamableHTTPSessionManager persist indefinitely in _server_instances even after the client disconnects, leaking memory over time (issue #1283). The session_idle_timeout parameter automatically terminates and removes sessions that receive no HTTP requests for the configured duration. Each session manages its own lifetime via an anyio CancelScope deadline — no background reaper task needed. Incoming requests push the deadline forward to keep active sessions alive. How Has This Been Tested? Tests added to tests/server/test_streamable_http_manager.py: idle session reaping (deterministic, no sleeps), terminate idempotency, and parameterized input validation. All existing tests pass unchanged. Breaking Changes None — new optional parameter with default None. Types of changes New feature (non-breaking change which adds functionality) Checklist I have read the MCP Documentation My code follows the repository's style guidelines New and existing tests pass locally I have added appropriate error handling I have added or updated documentation as needed
Open Graph Description: Port of #1994 (v1.x) to main. Motivation and Context Sessions created via StreamableHTTPSessionManager persist indefinitely in _server_instances even after the client disconnects, leaking memory ov...
X Description: Port of #1994 (v1.x) to main. Motivation and Context Sessions created via StreamableHTTPSessionManager persist indefinitely in _server_instances even after the client disconnects, leaking memory ov...
Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2022
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