@mytec: iter2.4.2 start

backend/app/api/routes/coverage.py

@@ -84,9 +84,15 @@ async def calculate_coverage(request: CoverageRequest) -> CoverageResponse:
             )
     except asyncio.TimeoutError:
         cancel_token.cancel()
-        raise HTTPException(408, "Calculation timeout (5 min) — try smaller radius or lower resolution")
+        # Force cleanup orphaned worker processes
+        from app.services.parallel_coverage_service import _kill_worker_processes
+        killed = _kill_worker_processes()
+        detail = f"Calculation timeout (5 min). Cleaned up {killed} workers." if killed else "Calculation timeout (5 min) — try smaller radius or lower resolution"
+        raise HTTPException(408, detail)
     except asyncio.CancelledError:
         cancel_token.cancel()
+        from app.services.parallel_coverage_service import _kill_worker_processes
+        _kill_worker_processes()
         raise HTTPException(499, "Client disconnected")
 
     computation_time = time.time() - start_time

backend/app/api/routes/system.py

@@ -1,3 +1,5 @@
+import os
+import asyncio
 import multiprocessing as mp
 from fastapi import APIRouter
 
@@ -42,3 +44,17 @@ async def get_system_info():
         "gpu": gpu_info,
         "gpu_available": gpu_info.get("available", False),
     }
+
+
+@router.post("/shutdown")
+async def shutdown():
+    """Graceful shutdown endpoint. Kills worker processes and exits."""
+    from app.services.parallel_coverage_service import _kill_worker_processes
+
+    killed = _kill_worker_processes()
+
+    # Schedule hard exit after response is sent
+    loop = asyncio.get_event_loop()
+    loop.call_later(0.5, lambda: os._exit(0))
+
+    return {"status": "shutting down", "workers_killed": killed}