fix: catch exception when create connection

superset/db_engine_specs/bigquery.py

@@ -17,7 +17,7 @@
 import re
 import urllib
 from datetime import datetime
-from typing import Any, Dict, List, Optional, Pattern, Tuple, TYPE_CHECKING
+from typing import Any, Dict, List, Optional, Pattern, Tuple, Type, TYPE_CHECKING
 
 import pandas as pd
 from apispec import APISpec
@@ -32,6 +32,7 @@
 
 from superset.databases.schemas import encrypted_field_properties, EncryptedField
 from superset.db_engine_specs.base import BaseEngineSpec
+from superset.db_engine_specs.exceptions import SupersetDBAPIDisconnectionError
 from superset.errors import SupersetError, SupersetErrorType
 from superset.sql_parse import Table
 from superset.utils import core as utils
@@ -388,6 +389,13 @@ def get_parameters_from_uri(
 
         raise ValidationError("Invalid service credentials")
 
+    @classmethod
+    def get_dbapi_exception_mapping(cls) -> Dict[Type[Exception], Type[Exception]]:
+        # pylint: disable=import-error,import-outside-toplevel
+        from google.auth.exceptions import DefaultCredentialsError
+
+        return {DefaultCredentialsError: SupersetDBAPIDisconnectionError}
+
     @classmethod
     def validate_parameters(
         cls, parameters: BigQueryParametersType  # pylint: disable=unused-argument

superset/models/core.py

@@ -372,7 +372,10 @@ def get_sqla_engine(
                 sqlalchemy_url, params, effective_username, security_manager, source
             )
 
-        return create_engine(sqlalchemy_url, **params)
+        try:
+            return create_engine(sqlalchemy_url, **params)
+        except Exception as ex:
+            raise self.db_engine_spec.get_dbapi_mapped_exception(ex)
 
     def get_reserved_words(self) -> Set[str]:
         return self.get_dialect().preparer.reserved_words