Zeren Wang b36504edf2
fix(gateway): reject MCP task cancellation when the worker is stopped (#4963)
The cancel endpoint resolved McpTaskService whenever SQL persistence was
configured, even with mcp_tasks.enabled=false, and acknowledged the
request by recording cancel_requested_at. The background loop that owns
the remote cancel call only runs when enabled, so the fence was never
claimed and the remote task kept running indefinitely.

Gate the endpoint on app.state.mcp_tasks_available (set only after the
service is started) and return 503 before writing the fence, consistent
with the background-loop ownership contract. Read-only list/detail
endpoints remain available while the worker is stopped.
2026-08-24 06:57:55 +08:00
..