When ending, ensure no retries happen

Author: tanguylebarzic

index.js

@@ -826,6 +826,8 @@ RedisClient.prototype.end = function () {
     this.stream._events = {};
     this.connected = false;
     this.ready = false;
+    this.closing = true;
+    clearTimeout(this.retry_timer);
     return this.stream.end();
 };