diff --git a/apps/backend/subscription/tools.py b/apps/backend/subscription/tools.py
index 3c6df6ebe..4155272e9 100644
--- a/apps/backend/subscription/tools.py
+++ b/apps/backend/subscription/tools.py
@@ -651,7 +651,7 @@ def get_host_detail(host_info_list: list, bk_biz_id: int = None, data_backend: s
         bk_cloud_ids.append(host["bk_cloud_id"])
 
     host_relations: Union[RedisList, list] = find_host_biz_relations(
-        list(set(bk_host_ids), data_backend), source="get_host_detail", data_backend=data_backend
+        list(set(bk_host_ids)), source="get_host_detail", data_backend=data_backend
     )
     host_biz_map = {}
     for host in host_relations:
@@ -833,6 +833,7 @@ def wrapper(
         nodes = sorted(scope["nodes"], key=lambda node: node.get("bk_biz_id") or scope.get("bk_biz_id"))
         params_list = [
             {
+                "data_backend": data_backend,
                 "scope": {
                     "bk_biz_id": bk_biz_id,
                     "object_type": scope["object_type"],
diff --git a/apps/utils/redis.py b/apps/utils/redis.py
index 9fea07d63..4c8c7a9ae 100644
--- a/apps/utils/redis.py
+++ b/apps/utils/redis.py
@@ -131,8 +131,9 @@ def __next__(self):
 
     def extend(self, iterable: Iterable[Any]) -> None:
         serialized_items = [json.dumps(item) for item in iterable]
-        self.client.rpush(self.uuid_key, *serialized_items)
-        self._update_redis_expiry()
+        if serialized_items:
+            self.client.rpush(self.uuid_key, *serialized_items)
+            self._update_redis_expiry()
 
     def append(self, obj: Any) -> None:
         self.client.rpush(self.uuid_key, json.dumps(obj))