refactor: empty query handler is not an issue anymore (#1844)

* refactor: empty query handler is not an issue anymore

* fix: empty query handler

jina/executors/indexers/__init__.py

@@ -113,7 +113,7 @@ def query_handler(self):
             :attr:`query_handler` and :attr:`write_handler` are by default mutex
         """
         r = None
-        if (not self.handler_mutex or not self.is_handler_loaded) and self.is_exist:
+        if not self.handler_mutex or not self.is_handler_loaded:
             r = self.get_query_handler()
             if r is None:
                 self.logger.warning(f'you can not query from {self} as its "query_handler" is not set. '

jina/executors/indexers/cache.py

@@ -88,10 +88,6 @@ def query(self, data, *args, **kwargs) -> Optional[bool]:
         :param data: either the id or the content_hash of a Document
         :return: status
         """
-        # FIXME this shouldn't happen
-        if self.query_handler is None:
-            self.query_handler = self.get_query_handler()
-
         if self.field == ID_KEY:
             status = (data in self.query_handler.ids) or None
         else: