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Title: Add idle session cleanup to prevent unbounded session accumulation by ddworken · Pull Request #1343 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: Add idle session cleanup to prevent unbounded session accumulation by ddworken · Pull Request #1343 · modelcontextprotocol/python-sdk

X Title: Add idle session cleanup to prevent unbounded session accumulation by ddworken · Pull Request #1343 · modelcontextprotocol/python-sdk

Description: Summary Added automatic cleanup of idle sessions when session count exceeds threshold Sessions inactive longer than idle timeout are terminated to free resources Prevents memory exhaustion from clients that create sessions but never terminate them Changes Added configurable session idle timeout (default 30 minutes) Added background cleanup task that activates when session count > 10k Track last activity time for each session Double-check idle status before cleanup to prevent race conditions Testing Added tests for idle session cleanup behavior Added tests for threshold-based activation Added tests for session activity tracking All existing tests continue to pass This ensures the server remains stable even when clients don't properly close their sessions.

Open Graph Description: Summary Added automatic cleanup of idle sessions when session count exceeds threshold Sessions inactive longer than idle timeout are terminated to free resources Prevents memory exhaustion from cl...

X Description: Summary Added automatic cleanup of idle sessions when session count exceeds threshold Sessions inactive longer than idle timeout are terminated to free resources Prevents memory exhaustion from cl...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/1343

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d86072e Add idle session cleanup to prevent unbounded session accumulation ddworken Sep 4, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/1343/commits/d86072e91adbf1caab04524630f63b505aa3f56f
1bea7c0 Fix formatting: remove trailing whitespace ddworken Sep 4, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/1343/commits/1bea7c0aad0eb6ddfeafa77f8e46e0958a5e1223
22d1367 Fix type errors and formatting in tests ddworken Sep 4, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/1343/commits/22d1367e70ef68f93d9c787a80e0ab4152841edf
56781df empty ddworken Sep 4, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/1343/commits/56781df907844aeaecbad0d9dd4b1243e824b400
d2ef92c empty ddworken Sep 4, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/1343/commits/d2ef92ca62071a7985a37e9b9699d01c9f06401e
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