From a6d0bab21ba414a676df4c674102d2b120559619 Mon Sep 17 00:00:00 2001
From: huip <penghui1012@gmail.com>
Date: Fri, 21 Jun 2019 17:12:18 +0800
Subject: [PATCH] Fixed bug when autoCommit arguments length equal 0

fixed when  autoCommit function arguments.length = 0, the cb is not defined
---
 lib/consumer.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/consumer.js b/lib/consumer.js
index d85a7351..3e00d5fa 100644
--- a/lib/consumer.js
+++ b/lib/consumer.js
@@ -158,7 +158,7 @@ function autoCommit (force, cb) {
     force = false;
   }
 
-  if (this.committing && !force) return cb(null, 'Offset committing');
+  if (this.committing && !force && cb) return cb(null, 'Offset committing');
 
   this.committing = true;
   setTimeout(function () {