From 2ff70044bd19cfb693b824fb6050b8a61b5be977 Mon Sep 17 00:00:00 2001
From: lepdou <lepdou@gmail.com>
Date: Mon, 12 Dec 2022 11:51:03 +0800
Subject: [PATCH] check instance list is null

---
 .../cloud/polaris/loadbalancer/LoadBalancerUtils.java        | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/spring-cloud-tencent-polaris-loadbalancer/src/main/java/com/tencent/cloud/polaris/loadbalancer/LoadBalancerUtils.java b/spring-cloud-tencent-polaris-loadbalancer/src/main/java/com/tencent/cloud/polaris/loadbalancer/LoadBalancerUtils.java
index c03db71f3..820c7a0b3 100644
--- a/spring-cloud-tencent-polaris-loadbalancer/src/main/java/com/tencent/cloud/polaris/loadbalancer/LoadBalancerUtils.java
+++ b/spring-cloud-tencent-polaris-loadbalancer/src/main/java/com/tencent/cloud/polaris/loadbalancer/LoadBalancerUtils.java
@@ -18,6 +18,7 @@
 
 package com.tencent.cloud.polaris.loadbalancer;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
@@ -84,7 +85,9 @@ public final class LoadBalancerUtils {
 		}
 
 		ServiceKey serviceKey = new ServiceKey(MetadataContext.LOCAL_NAMESPACE, serviceName);
-		return new DefaultServiceInstances(serviceKey, instancesRef.get());
+		List<Instance> instances = instancesRef.get() == null ? Collections.emptyList() : instancesRef.get();
+
+		return new DefaultServiceInstances(serviceKey, instances);
 	}
 
 	/**