Fixed - Cluster failover handling #5857

redisson/src/main/java/org/redisson/cluster/ClusterConnectionManager.java

@@ -36,6 +36,7 @@ import java.util.*;
 import java.util.concurrent.*;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.concurrent.atomic.AtomicReferenceArray;
+import java.util.function.BinaryOperator;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
@@ -983,7 +984,8 @@ public class ClusterConnectionManager extends MasterSlaveConnectionManager {
     }
 
     private Collection<ClusterPartition> getLastPartitions() {
-        return new HashSet<>(lastUri2Partition.values());
+        return lastUri2Partition.values().stream().collect(Collectors.toMap(e -> e.getNodeId(), Function.identity(),
+                                                                BinaryOperator.maxBy(Comparator.comparing(e -> e.getTime())))).values();
     }
 
     public int getSlot(MasterSlaveEntry entry) {

redisson/src/main/java/org/redisson/cluster/ClusterPartition.java

@@ -46,6 +46,8 @@ public class ClusterPartition {
 
     private int references;
 
+    private long time = System.currentTimeMillis();
+    
     public ClusterPartition(String nodeId) {
         super();
         this.nodeId = nodeId;
@@ -150,6 +152,10 @@ public class ClusterPartition {
         return --references;
     }
 
+    public long getTime() {
+        return time;
+    }
+
     @Override
     public int hashCode() {
         return Objects.hash(nodeId);