BUG: fixed model serve fail with HTTP 400 on Bad Request. Signed-off-…

…by: Andrei Batomunkuev andreibatomunkuev@gmail.com

Signed-off-by: abatomunkuev <abatomunkuev@myseneca.ca>

mlflow/pyfunc/scoring_server/__init__.py

@@ -85,7 +85,7 @@ def infer_and_parse_json_input(json_input, schema: Schema = None):
                 "Failed to parse input from JSON. Ensure that input is a valid JSON"
                 " formatted string."
             ),
-            error_code=MALFORMED_REQUEST,
+            error_code=BAD_REQUEST,
         )
 
     if isinstance(decoded_input, list):