Add HandledGraphQLError that does not log an exception

Author: Siecje

graphql/error/base.py

@@ -78,3 +78,6 @@ def locations(self):
             if self.positions and source:
                 self._locations = [get_location(source, pos) for pos in self.positions]
         return self._locations
+
+class HandledGraphQLError(GraphQLError):
+    pass

graphql/execution/executor.py

@@ -8,7 +8,7 @@
 from six import string_types
 from promise import Promise, promise_for_dict, is_thenable
 
-from ..error import GraphQLError, GraphQLLocatedError
+from ..error import GraphQLError, GraphQLLocatedError, HandledGraphQLError
 from ..pyutils.default_ordered_dict import DefaultOrderedDict
 from ..pyutils.ordereddict import OrderedDict
 from ..utils.undefined import Undefined
@@ -445,6 +445,8 @@ def resolve_or_error(
     # type: (...) -> Any
     try:
         return executor.execute(resolve_fn, source, info, **args)
+    except HandledGraphQLError:
+        raise
     except Exception as e:
         logger.exception(
             "An error occurred while resolving field {}.{}".format(