From 43a70f2e9f6f67526222f18589c67c7343ec21f2 Mon Sep 17 00:00:00 2001
From: j00356287 <jiajunsu@huawei.com>
Date: Fri, 18 Oct 2024 17:36:50 +0800
Subject: [PATCH] Should not update Known nodes when refreshed topology is
 empty

Closes #3017
---
 .../java/io/lettuce/core/masterreplica/SentinelConnector.java  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/io/lettuce/core/masterreplica/SentinelConnector.java b/src/main/java/io/lettuce/core/masterreplica/SentinelConnector.java
index ba44025af9..146cbb55c5 100644
--- a/src/main/java/io/lettuce/core/masterreplica/SentinelConnector.java
+++ b/src/main/java/io/lettuce/core/masterreplica/SentinelConnector.java
@@ -120,7 +120,8 @@ private Runnable getTopologyRefreshRunnable(MasterReplicaTopologyRefresh refresh
                     EventRecorder.getInstance().record(new MasterReplicaTopologyChangedEvent(redisURI, nodes));
 
                     if (nodes.isEmpty()) {
-                        LOG.warn("Topology refresh returned no nodes from {}", redisURI);
+                        LOG.warn("Topology refresh returned no nodes from {}, skip refresh Known nodes", redisURI);
+                        return;
                     }
 
                     LOG.debug("New topology: {}", nodes);