Add warning message.

Author: Boyu Chen

src/sagemaker_huggingface_inference_toolkit/handler_service.py

@@ -245,6 +245,12 @@ def handle(self, data, context):
         """
         try:
             if not self.initialized:
+                logger.warn(
+                    f"Model is not initialized, will try to load model again.\n"
+                    f"This might cause following error during invocation:\n"
+                    f"model_fn() takes 1 positional argument but 2 were given :\n"
+                    f"Please consider increase wait time for model loading.\n"
+                )
                 self.initialize(context)
 
             input_data = data[0].get("body")