diff --git a/redisson/src/main/java/org/redisson/cluster/ClusterConnectionManager.java b/redisson/src/main/java/org/redisson/cluster/ClusterConnectionManager.java
index ad1eac228..f7b4cd7ba 100644
--- a/redisson/src/main/java/org/redisson/cluster/ClusterConnectionManager.java
+++ b/redisson/src/main/java/org/redisson/cluster/ClusterConnectionManager.java
@@ -91,7 +91,7 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
         List<String> failedMasters = new ArrayList<String>();
         for (String address : cfg.getNodeAddresses()) {
             RedisURI addr = new RedisURI(address);
-            RFuture<RedisConnection> connectionFuture = connectToNode(cfg, addr, null, addr.getHost());
+            RFuture<RedisConnection> connectionFuture = connectToNode(cfg, addr, addr.getHost());
             try {
                 RedisConnection connection = connectionFuture.syncUninterruptibly().getNow();
 
@@ -276,7 +276,7 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
         }
 
         RPromise<Void> result = new RedissonPromise<>();
-        RFuture<RedisConnection> connectionFuture = connectToNode(cfg, partition.getMasterAddress(), null, configEndpointHostName);
+        RFuture<RedisConnection> connectionFuture = connectToNode(cfg, partition.getMasterAddress(), configEndpointHostName);
         connectionFuture.onComplete((connection, ex1) -> {
             if (ex1 != null) {
                 log.error("Can't connect to master: {} with slot ranges: {}", partition.getMasterAddress(), partition.getSlotRanges());
@@ -425,7 +425,7 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
             return;
         }
         RedisURI uri = iterator.next();
-        RFuture<RedisConnection> connectionFuture = connectToNode(cfg, uri, null, configEndpointHostName);
+        RFuture<RedisConnection> connectionFuture = connectToNode(cfg, uri, configEndpointHostName);
         connectionFuture.onComplete((connection, e) -> {
             if (e != null) {
                 lastException.set(e);
diff --git a/redisson/src/main/java/org/redisson/connection/MasterSlaveConnectionManager.java b/redisson/src/main/java/org/redisson/connection/MasterSlaveConnectionManager.java
index caac1e439..9dc3c3e41 100644
--- a/redisson/src/main/java/org/redisson/connection/MasterSlaveConnectionManager.java
+++ b/redisson/src/main/java/org/redisson/connection/MasterSlaveConnectionManager.java
@@ -36,10 +36,7 @@ import org.redisson.client.codec.Codec;
 import org.redisson.client.protocol.RedisCommand;
 import org.redisson.cluster.ClusterSlotRange;
 import org.redisson.command.CommandSyncService;
-import org.redisson.config.BaseMasterSlaveServersConfig;
-import org.redisson.config.Config;
-import org.redisson.config.MasterSlaveServersConfig;
-import org.redisson.config.TransportMode;
+import org.redisson.config.*;
 import org.redisson.misc.CountableListener;
 import org.redisson.misc.InfinitySemaphoreLatch;
 import org.redisson.misc.RPromise;
@@ -149,7 +146,7 @@ public class MasterSlaveConnectionManager implements ConnectionManager {
 
     protected PublishSubscribeService subscribeService;
     
-    private final Map<Object, RedisConnection> nodeConnections = new ConcurrentHashMap<>();
+    private final Map<RedisURI, RedisConnection> nodeConnections = new ConcurrentHashMap<>();
     
     public MasterSlaveConnectionManager(MasterSlaveServersConfig cfg, Config config, UUID id) {
         this(config, id);
@@ -244,34 +241,19 @@ public class MasterSlaveConnectionManager implements ConnectionManager {
         }
     }
 
-    protected final void disconnectNode(RedisClient client) {
-        RedisConnection conn = nodeConnections.remove(client);
-        if (conn != null) {
-            conn.closeAsync();
-        }
-    }
-
-    protected final RFuture<RedisConnection> connectToNode(BaseMasterSlaveServersConfig<?> cfg, RedisURI addr, RedisClient client, String sslHostname) {
-        final Object key;
-        if (client != null) {
-            key = client;
-        } else {
-            key = addr;
-        }
-        RedisConnection conn = nodeConnections.get(key);
+    protected final RFuture<RedisConnection> connectToNode(BaseConfig<?> cfg, RedisURI addr, String sslHostname) {
+        RedisConnection conn = nodeConnections.get(addr);
         if (conn != null) {
             if (!conn.isActive()) {
-                nodeConnections.remove(key);
+                nodeConnections.remove(addr);
                 conn.closeAsync();
             } else {
                 return RedissonPromise.newSucceededFuture(conn);
             }
         }
 
-        if (addr != null) {
-            client = createClient(NodeType.MASTER, addr, cfg.getConnectTimeout(), cfg.getTimeout(), sslHostname);
-        }
-        final RPromise<RedisConnection> result = new RedissonPromise<RedisConnection>();
+        RedisClient client = createClient(NodeType.MASTER, addr, cfg.getConnectTimeout(), cfg.getTimeout(), sslHostname);
+        RPromise<RedisConnection> result = new RedissonPromise<>();
         RFuture<RedisConnection> future = client.connectAsync();
         future.onComplete((connection, e) -> {
             if (e != null) {
@@ -280,7 +262,7 @@ public class MasterSlaveConnectionManager implements ConnectionManager {
             }
 
             if (connection.isActive()) {
-                nodeConnections.put(key, connection);
+                nodeConnections.put(addr, connection);
                 result.trySuccess(connection);
             } else {
                 connection.closeAsync();
diff --git a/redisson/src/main/java/org/redisson/connection/ReplicatedConnectionManager.java b/redisson/src/main/java/org/redisson/connection/ReplicatedConnectionManager.java
index 3d27e91e2..de29c68ac 100644
--- a/redisson/src/main/java/org/redisson/connection/ReplicatedConnectionManager.java
+++ b/redisson/src/main/java/org/redisson/connection/ReplicatedConnectionManager.java
@@ -71,7 +71,7 @@ public class ReplicatedConnectionManager extends MasterSlaveConnectionManager {
 
         for (String address : cfg.getNodeAddresses()) {
             RedisURI addr = new RedisURI(address);
-            RFuture<RedisConnection> connectionFuture = connectToNode(cfg, addr, null, addr.getHost());
+            RFuture<RedisConnection> connectionFuture = connectToNode(cfg, addr, addr.getHost());
             connectionFuture.awaitUninterruptibly();
             RedisConnection connection = connectionFuture.getNow();
             if (connection == null) {
@@ -131,7 +131,7 @@ public class ReplicatedConnectionManager extends MasterSlaveConnectionManager {
                 AtomicInteger count = new AtomicInteger(cfg.getNodeAddresses().size());
                 for (String address : cfg.getNodeAddresses()) {
                     RedisURI addr = new RedisURI(address);
-                    RFuture<RedisConnection> connectionFuture = connectToNode(cfg, addr, null, addr.getHost());
+                    RFuture<RedisConnection> connectionFuture = connectToNode(cfg, addr, addr.getHost());
                     connectionFuture.onComplete((connection, exc) -> {
                         if (exc != null) {
                             log.error(exc.getMessage(), exc);
diff --git a/redisson/src/main/java/org/redisson/connection/SentinelConnectionManager.java b/redisson/src/main/java/org/redisson/connection/SentinelConnectionManager.java
index a39cb3177..ead8f7740 100755
--- a/redisson/src/main/java/org/redisson/connection/SentinelConnectionManager.java
+++ b/redisson/src/main/java/org/redisson/connection/SentinelConnectionManager.java
@@ -296,7 +296,7 @@ public class SentinelConnectionManager extends MasterSlaveConnectionManager {
                     }
 
                     Set<RedisURI> newUris = future.getNow().stream()
-                            .map(addr -> toURI(addr.getAddress().getHostAddress(), "" + addr.getPort()))
+                            .map(addr -> getIpAddr(addr))
                             .collect(Collectors.toSet());
 
                     for (RedisURI uri : newUris) {
@@ -343,7 +343,8 @@ public class SentinelConnectionManager extends MasterSlaveConnectionManager {
         }
 
         RedisClient client = iterator.next();
-        RFuture<RedisConnection> connectionFuture = connectToNode(null, null, client, null);
+        RedisURI addr = getIpAddr(client.getAddr());
+        RFuture<RedisConnection> connectionFuture = connectToNode(cfg, addr, null);
         connectionFuture.onComplete((connection, e) -> {
             if (e != null) {
                 lastException.set(e);
@@ -484,7 +485,7 @@ public class SentinelConnectionManager extends MasterSlaveConnectionManager {
             }).collect(Collectors.toSet());
             
             InetSocketAddress addr = connection.getRedisClient().getAddr();
-            RedisURI currentAddr = toURI(addr.getAddress().getHostAddress(), "" + addr.getPort());
+            RedisURI currentAddr = getIpAddr(addr);
             newUris.add(currentAddr);
             
             updateSentinels(newUris);
@@ -505,7 +506,7 @@ public class SentinelConnectionManager extends MasterSlaveConnectionManager {
         for (RedisURI uri : currentUris) {
             RedisClient sentinel = SentinelConnectionManager.this.sentinels.remove(uri);
             if (sentinel != null) {
-                disconnectNode(sentinel);
+                disconnectNode(uri);
                 sentinel.shutdownAsync();
                 log.warn("sentinel: {} is down", uri);
             }
@@ -540,7 +541,7 @@ public class SentinelConnectionManager extends MasterSlaveConnectionManager {
                 return;
             }
 
-            RedisURI ipAddr = toURI(client.getAddr().getAddress().getHostAddress(), "" + client.getAddr().getPort());
+            RedisURI ipAddr = getIpAddr(client.getAddr());
             if (isHostname) {
                 RedisClient sentinel = sentinels.get(ipAddr);
                 if (sentinel != null) {
@@ -574,6 +575,10 @@ public class SentinelConnectionManager extends MasterSlaveConnectionManager {
         return result;
     }
 
+    private RedisURI getIpAddr(InetSocketAddress addr) {
+        return toURI(addr.getAddress().getHostAddress(), "" + addr.getPort());
+    }
+
     private RFuture<Void> addSlave(RedisURI uri) {
         RPromise<Void> result = new RedissonPromise<Void>();
         // to avoid addition twice