[ray_client]: fix exceptions raised while executing on the server on behalf of the client (#13424)

python/ray/tests/test_actor.py

@@ -855,6 +855,11 @@ def test_inherit_actor_from_class(ray_start_regular_shared):
     assert ray.get(actor.g.remote(5)) == 6
 
 
+def test_get_non_existing_named_actor(ray_start_regular_shared):
+    with pytest.raises(ValueError):
+        _ = ray.get_actor("non_existing_actor")
+
+
 @pytest.mark.skip(
     "This test is just used to print the latency of creating 100 actors.")
 def test_actor_creation_latency(ray_start_regular_shared):

python/ray/util/client/server/server.py

@@ -261,8 +261,7 @@ class RayletServicer(ray_client_pb2_grpc.RayletDriverServicer):
                 result.valid = True
                 return result
         except Exception as e:
-            logger.error(f"Caught schedule exception {e}")
-            raise e
+            logger.debug(f"Caught schedule exception, returning: {e}")
             return ray_client_pb2.ClientTaskTicket(
                 valid=False, error=cloudpickle.dumps(e))