diff --git a/src/main/java/redis/clients/jedis/DefaultJedisSocketFactory.java b/src/main/java/redis/clients/jedis/DefaultJedisSocketFactory.java
index 6acf24c13c..a2d963e221 100644
--- a/src/main/java/redis/clients/jedis/DefaultJedisSocketFactory.java
+++ b/src/main/java/redis/clients/jedis/DefaultJedisSocketFactory.java
@@ -70,6 +70,8 @@ private Socket connectToFirstSuccessfulHost(HostAndPort hostAndPort) throws Exce
         socket.setTcpNoDelay(true); // Socket buffer Whetherclosed, to ensure timely delivery of data
         socket.setSoLinger(true, 0); // Control calls close () method, the underlying socket is closed immediately
 
+        // Passing 'host' directly will avoid another call to InetAddress.getByName() inside the InetSocketAddress constructor.
+        // For machines with ipv4 and ipv6, but the startNode uses ipv4 to connect, the ipv6 connection may fail.
         socket.connect(new InetSocketAddress(host, hostAndPort.getPort()), connectionTimeout);
         return socket;
       } catch (Exception e) {