Raise error early for MLFlow in local container mode

Author: ruiliann666

src/sagemaker/serve/builder/model_builder.py

@@ -934,6 +934,15 @@ def build(  # pylint: disable=R0911
             self.built_model = self._build_for_model_server()
             return self.built_model
 
+        if self.mode == Mode.LOCAL_CONTAINER and (
+            self.model_metadata and (
+                "MLFLOW_MODEL_PATH" in self.model_metadata or
+                "MLFLOW_TRACKING_ARN" in self.model_metadata
+            )
+        ):
+            raise ValueError("MLflow model support is not available in Local Container mode. "
+                         "Please use SageMaker Endpoint mode for MLflow models.")
+
         if isinstance(self.model, str):
             model_task = None
 
@@ -992,6 +1001,7 @@ def build(  # pylint: disable=R0911
 
         raise ValueError("%s model server is not supported" % self.model_server)
 
+
     def _build_validations(self):
         """Validations needed for model server overrides, or auto-detection or fallback"""
         if self.inference_spec and self.model: