@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