Claude Code: I'll fix the import issue causing the AttributeError in app.py by ensuri

app.py

@@ -2890,6 +2890,25 @@ if __name__ == "__main__":
         signal.signal(signal.SIGALRM, timeout_handler)
         signal.alarm(_launch_timeout)
 
+        # Set up global asyncio exception handler to catch CancelledError from queue operations
+        def asyncio_exception_handler(loop, context):
+            """Handle asyncio exceptions, especially CancelledError from queue operations."""
+            exception = context.get("exception")
+            if exception and isinstance(exception, asyncio.CancelledError):
+                # CancelledError is normal asyncio behavior - log as debug only
+                logger.debug(f"[ASYNC_LOOP] Task cancelled: {context.get('task', 'unknown')}")
+                return  # Don't re-raise
+            # Log other exceptions
+            logger.error(f"[ASYNC_LOOP] Unhandled exception: {context}")
+
+        # Get the current event loop and set the exception handler
+        try:
+            loop = asyncio.get_event_loop()
+            loop.set_exception_handler(asyncio_exception_handler)
+            log_startup("Global asyncio exception handler installed")
+        except Exception as handler_error:
+            log_startup(f"Failed to set asyncio exception handler: {handler_error}", "WARNING")
+
         try:
             uvicorn.run(
                 app,