优化

@@ -307,6 +307,13 @@ end",
         if(empty(static::$instance[$cid])){
             static::$instance[$cid] = new \Lib\RedisPool($cid);
         }
+        try {
+            static::$instance[$cid]->client->ping();
+        }catch (\Throwable $e){
+            static::$instance[$cid]->close();
+
+            static::$instance[$cid] = new \Lib\RedisPool($cid);
+        }
 
         return static::$instance[$cid];
     }