From ce07c555b29ee86bfe02e56ab5233257b4eaf873 Mon Sep 17 00:00:00 2001
From: Savorboard <yangxiaodong1214@126.com>
Date: Mon, 23 Dec 2019 20:47:27 +0800
Subject: [PATCH] Add  empty detection

---
 .../Internal/IConsumerServiceSelector.Default.cs             | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/DotNetCore.CAP/Internal/IConsumerServiceSelector.Default.cs b/src/DotNetCore.CAP/Internal/IConsumerServiceSelector.Default.cs
index 7866c5b..f77ed53 100644
--- a/src/DotNetCore.CAP/Internal/IConsumerServiceSelector.Default.cs
+++ b/src/DotNetCore.CAP/Internal/IConsumerServiceSelector.Default.cs
@@ -52,6 +52,11 @@ namespace DotNetCore.CAP.Internal
 
         public ConsumerExecutorDescriptor SelectBestCandidate(string key, IReadOnlyList<ConsumerExecutorDescriptor> executeDescriptor)
         {
+            if (executeDescriptor.Count == 0)
+            {
+                return null;
+            }
+
             var result = MatchUsingName(key, executeDescriptor);
             if (result != null)
             {