keep compatibility

client/src/main/java/org/apache/rocketmq/client/exception/MQBrokerException.java

@@ -25,6 +25,14 @@ public class MQBrokerException extends Exception {
     private final String errorMessage;
     private final String brokerAddr;
 
+    public MQBrokerException(int responseCode, String errorMessage) {
+        super(FAQUrl.attachDefaultURL("CODE: " + UtilAll.responseCode2String(responseCode) + "  DESC: "
+                + errorMessage));
+        this.responseCode = responseCode;
+        this.errorMessage = errorMessage;
+        this.brokerAddr = null;
+    }
+
     public MQBrokerException(int responseCode, String errorMessage, String brokerAddr) {
         super(FAQUrl.attachDefaultURL("CODE: " + UtilAll.responseCode2String(responseCode) + "  DESC: "
             + errorMessage + (brokerAddr != null ? " BROKER: " + brokerAddr : "")));

client/src/main/java/org/apache/rocketmq/client/impl/MQClientAPIImpl.java

@@ -1340,7 +1340,7 @@ public class MQClientAPIImpl {
                 break;
         }
 
-        throw new MQBrokerException(response.getCode(), response.getRemark(), null);
+        throw new MQBrokerException(response.getCode(), response.getRemark());
     }
 
     public TopicRouteData getDefaultTopicRouteInfoFromNameServer(final String topic, final long timeoutMillis)