Add idle session timeout to StreamableHTTPSessionManager #2022
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Sessions created via StreamableHTTPSessionManager persist indefinitely in _server_instances even after the client disconnects, leaking memory over time. Add a session_idle_timeout parameter that 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. Github-Issue: #1283
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Code reviewNo issues found. Checked for bugs and CLAUDE.md compliance. |
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Code reviewNo issues found. Checked for bugs and CLAUDE.md compliance. |
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Port of #1994 (v1.x) to main.
Motivation and Context
Sessions created via StreamableHTTPSessionManager persist indefinitely in
_server_instanceseven after the client disconnects, leaking memory over time (issue #1283).The
session_idle_timeoutparameter automatically terminates and removes sessions that receive no HTTP requests for the configured duration. Each session manages its own lifetime via an anyioCancelScopedeadline — no background reaper task needed. Incoming requests push the deadline forward to keep active sessions alive.How Has This Been Tested?
11 dedicated tests covering: idle reaping, activity reset, multi-session independence, validation, terminate idempotency, lifecycle, and end-to-end behavior. Existing manager tests continue to pass.
Breaking Changes
None — new optional parameter with default
None.Types of changes
Checklist