Fixed ClassCastException error when there are no slaves in sentinel mode. #632

redisson/pom.xml

@@ -97,7 +97,7 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-simple</artifactId>
-            <version>1.7.21</version>
+            <version>1.7.16</version>
             <scope>test</scope>
         </dependency>
         <dependency>

redisson/src/main/java/org/redisson/client/protocol/RedisCommands.java

@@ -281,7 +281,7 @@ public interface RedisCommands {
 
     RedisStrictCommand<List<String>> SENTINEL_GET_MASTER_ADDR_BY_NAME = new RedisStrictCommand<List<String>>("SENTINEL", "GET-MASTER-ADDR-BY-NAME", new StringListReplayDecoder());
     RedisCommand<List<Map<String, String>>> SENTINEL_SLAVES = new RedisCommand<List<Map<String, String>>>("SENTINEL", "SLAVES",
-            new FlatNestedMultiDecoder(new ObjectMapReplayDecoder(), new ListResultReplayDecoder()), ValueType.OBJECT
+            new NestedMultiDecoder(new ObjectMapReplayDecoder(), new ListResultReplayDecoder(), true), ValueType.OBJECT
             );
 
     RedisStrictCommand<Void> CLUSTER_ADDSLOTS = new RedisStrictCommand<Void>("CLUSTER", "ADDSLOTS");

redisson/src/main/java/org/redisson/client/protocol/decoder/FlatNestedMultiDecoder.java

@@ -21,12 +21,14 @@ import org.redisson.client.handler.State;
 
 import io.netty.buffer.ByteBuf;
 
+/**
+ * 
+ * @author Nikita Koksharov
+ *
+ * @param <T> object type
+ */
 public class FlatNestedMultiDecoder<T> extends NestedMultiDecoder {
 
-    public FlatNestedMultiDecoder(MultiDecoder<Object> firstDecoder, MultiDecoder<Object> secondDecoder) {
-        super(firstDecoder, secondDecoder);
-    }
-    
     public FlatNestedMultiDecoder(MultiDecoder firstDecoder, MultiDecoder secondDecoder, boolean handleEmpty) {
         super(firstDecoder, secondDecoder, handleEmpty);
     }

redisson/src/main/java/org/redisson/client/protocol/decoder/NestedMultiDecoder.java

@@ -22,6 +22,12 @@ import org.redisson.client.handler.State;
 
 import io.netty.buffer.ByteBuf;
 
+/**
+ * 
+ * @author Nikita Koksharov
+ *
+ * @param <T> object type
+ */
 public class NestedMultiDecoder<T> implements MultiDecoder<Object> {
 
     public static class NestedDecoderState implements DecoderState {