Refa: ensure Redis stream queue could be created properly (#9223)

### What problem does this PR solve?

Ensure Redis queue could be created properly.

### Type of change

- [x] Refactoring

rag/utils/redis_conn.py

         """https://redis.io/docs/latest/commands/xreadgroup/"""
         for _ in range(3):
             try:
-                group_info = self.REDIS.xinfo_groups(queue_name)
-                if not any(gi["name"] == group_name for gi in group_info):
-                    self.REDIS.xgroup_create(queue_name, group_name, id="0", mkstream=True)
+
+                try:
+                    group_info = self.REDIS.xinfo_groups(queue_name)
+                    if not any(gi["name"] == group_name for gi in group_info):
+                        self.REDIS.xgroup_create(queue_name, group_name, id="0", mkstream=True)
+                except redis.exceptions.ResponseError as e:
+                    if "no such key" in str(e).lower():
+                        self.REDIS.xgroup_create(queue_name, group_name, id="0", mkstream=True)
+                    elif "busygroup" in str(e).lower():
+                        logging.warning("Group already exists, continue.")
+                        pass
+                    else:
+                        raise
+
                 args = {
                     "groupname": group_name,
                     "consumername": consumer_name,
             logging.warning("RedisDB.delete " + str(key) + " got exception: " + str(e))
             self.__open__()
         return False
-    
-    
+
+
 REDIS_CONN = RedisDB()