From 59e85ee56676bf219b25843303d8fec7ec3324cb Mon Sep 17 00:00:00 2001
From: Haotian Zhang <928016560@qq.com>
Date: Fri, 9 May 2025 19:58:28 +0800
Subject: [PATCH] feat:support smooth upgrade from tsf.

---
 .../cloud/polaris/registry/PolarisServiceRegistry.java        | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/registry/PolarisServiceRegistry.java b/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/registry/PolarisServiceRegistry.java
index ff4c87c4b..71de4be33 100644
--- a/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/registry/PolarisServiceRegistry.java
+++ b/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/registry/PolarisServiceRegistry.java
@@ -237,7 +237,7 @@ public class PolarisServiceRegistry implements ServiceRegistry<PolarisRegistrati
 		InstancesResponse instancesResponse = polarisDiscoveryHandler.getInstances(serviceName);
 		Instance[] instances = instancesResponse.getInstances();
 		if (null == instances) {
-			return null;
+			return "DOWN";
 		}
 		for (Instance instance : instances) {
 			if (instance.getHost().equalsIgnoreCase(registration.getHost())
@@ -245,7 +245,7 @@ public class PolarisServiceRegistry implements ServiceRegistry<PolarisRegistrati
 				return instance.isHealthy() ? "UP" : "DOWN";
 			}
 		}
-		return null;
+		return "DOWN";
 	}
 
 	/**