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Add warning log when rejecting request with unknown/expired session ID #2212

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Add warning log when rejecting request with unknown/expired session ID #2212

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6662939
Add warning log when rejecting request with unknown/expired session ID
rameshreddy-adutla Mar 4, 2026
6f99c3d
Fix ruff format: single-line warning log message
rameshreddy-adutla Mar 4, 2026
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1 change: 1 addition & 0 deletions src/mcp/server/streamable_http_manager.py
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Expand Up @@ -272,6 +272,7 @@ async def run_server(*, task_status: TaskStatus[None] = anyio.TASK_STATUS_IGNORE
# Unknown or expired session ID - return 404 per MCP spec
# TODO: Align error code once spec clarifies
# See: https://github.com/modelcontextprotocol/python-sdk/issues/1821
logger.warning(f"Rejected request with unknown or expired session ID: {request_mcp_session_id}")
error_response = JSONRPCError(
jsonrpc="2.0",
id=None,
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