diff --git a/CHANGELOG.md b/CHANGELOG.md
index b628ee78a80b90641f3745647552b7b3c3cb98dc..7debdea9963f8ed00d0bc5fd0e8df5d22034a028 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,8 @@
 ### v1.2.2 - 2021-12-26
 - :sparkles: mica-mqtt server 添加发布权限接口，无权限直接断开连接，避免高级别 qos 重试浪费资源。
 - :sparkles: mica-mqtt-broker 优化节点信息存储
-- :sparkles: mqtt client 抽象 IMqttClientSession 接口。
+- :sparkles: mica-mqtt client 重复订阅优化。感谢 `@一片小雨滴`
+- :sparkles: mica-mqtt client 抽象 IMqttClientSession 接口。
 - :bug: 修复重构 AbstractMqttMessageDispatcher 保持跟 mica-mqtt-broker 逻辑一致 gitee #I4MA6A 感谢 `@胡萝博`
 - :arrow_up: mica-mqtt-example 升级 log4j2 到 2.17.0
 
diff --git a/mica-mqtt-core/README.md b/mica-mqtt-core/README.md
index 57358dfde5b12fb6c1d3a4a81bf3ae495cf7f001..65aabda02d7fbd55ed356891348f797a0b66608d 100644
--- a/mica-mqtt-core/README.md
+++ b/mica-mqtt-core/README.md
@@ -143,11 +143,3 @@ mqttServer.publishAll("/test/123", ByteBuffer.wrap("mica最牛皮".getBytes()));
 // 停止服务
 mqttServer.stop();
 ```
-
-## 基于 mq 消息广播集群处理
-
-- 实现 `IMqttConnectStatusListener` 处理设备状态存储。
-- 实现 `IMqttMessageListener` 将消息转发到 mq，业务按需处理 mq 消息。
-- 实现 `IMqttMessageStore` 存储遗嘱和保留消息。
-- 实现 `AbstractMqttMessageDispatcher` 将消息发往 mq，mq 再广播回 mqtt 集群，mqtt 将消息发送到设备。
-- 业务消息发送到 mq，mq 广播到 mqtt 集群，mqtt 将消息发送到设备。
diff --git a/mica-mqtt-core/src/main/java/net/dreamlu/iot/mqtt/core/server/auth/IMqttServerPublishPermission.java b/mica-mqtt-core/src/main/java/net/dreamlu/iot/mqtt/core/server/auth/IMqttServerPublishPermission.java
index 369c934c14960cc95a740818769e137971c6475d..3799f544b16ecec4b7d62692843ade98d78dfa28 100644
--- a/mica-mqtt-core/src/main/java/net/dreamlu/iot/mqtt/core/server/auth/IMqttServerPublishPermission.java
+++ b/mica-mqtt-core/src/main/java/net/dreamlu/iot/mqtt/core/server/auth/IMqttServerPublishPermission.java
@@ -33,8 +33,9 @@ public interface IMqttServerPublishPermission {
 	 * @param clientId 客户端 id
 	 * @param topic    topic
 	 * @param qoS      MqttQoS
+	 * @param isRetain 是否保留消息
 	 * @return 否有发布权限
 	 */
-	boolean hasPermission(ChannelContext context, String clientId, String topic, MqttQoS qoS);
+	boolean hasPermission(ChannelContext context, String clientId, String topic, MqttQoS qoS, boolean isRetain);
 
 }
diff --git a/mica-mqtt-core/src/main/java/net/dreamlu/iot/mqtt/core/server/support/DefaultMqttServerProcessor.java b/mica-mqtt-core/src/main/java/net/dreamlu/iot/mqtt/core/server/support/DefaultMqttServerProcessor.java
index 0a7d36fbcebab42af69eed47152214f075fee3b6..dd92c93863502f071ddd3c5b2194887f1be807d6 100644
--- a/mica-mqtt-core/src/main/java/net/dreamlu/iot/mqtt/core/server/support/DefaultMqttServerProcessor.java
+++ b/mica-mqtt-core/src/main/java/net/dreamlu/iot/mqtt/core/server/support/DefaultMqttServerProcessor.java
@@ -199,7 +199,7 @@ public class DefaultMqttServerProcessor implements MqttServerProcessor {
 		MqttPublishVariableHeader variableHeader = message.variableHeader();
 		String topicName = variableHeader.topicName();
 		// 1. 判断是否有发布权限，没有权限则断开 mqtt 连接 mqtt 5.x qos1、qos2 可以响应 reasonCode
-		if (publishPermission != null && !publishPermission.hasPermission(context, clientId, topicName, mqttQoS)) {
+		if (publishPermission != null && !publishPermission.hasPermission(context, clientId, topicName, mqttQoS, fixedHeader.isRetain())) {
 			Tio.remove(context, "Mqtt clientId:" + clientId + " publish topic: " + topicName + " no permission.");
 			return;
 		}
@@ -428,7 +428,7 @@ public class DefaultMqttServerProcessor implements MqttServerProcessor {
 			message.setPayload(payload);
 		}
 		message.setMessageType(MessageType.UP_STREAM);
-		message.setRetain(fixedHeader.isRetain());
+		message.setRetain(isRetain);
 		message.setDup(fixedHeader.isDup());
 		message.setTimestamp(System.currentTimeMillis());
 		Node clientNode = context.getClientNode();
diff --git a/mica-mqtt-spring-boot-starter/README.md b/mica-mqtt-spring-boot-starter/README.md
index 3ff21362944704f814071de7a088dc6d5d35da68..4fefbc86f8af140439a2ad9ccab8ba1f4925f411 100644
--- a/mica-mqtt-spring-boot-starter/README.md
+++ b/mica-mqtt-spring-boot-starter/README.md
@@ -63,7 +63,8 @@ mqtt:
 | ---------------------------   | -------------- | ------------------------- |
 | IMqttServerUniqueIdService    | 否             | 用于 clientId 不唯一时，自定义实现唯一标识，后续接口使用它替代 clientId |
 | IMqttServerAuthHandler        | 是             | 用于服务端认证               |
-| IMqttServerSubscribeValidator | 是             | 1.1.3 新增，用于服务端订阅校验 |
+| IMqttServerSubscribeValidator | 否（建议实现）   | 1.1.3 新增，用于对客户端订阅校验 |
+| IMqttServerPublishPermission  | 否（建议实现）   | 1.2.2 新增，用于对客户端发布权限校验 |
 | IMqttMessageListener          | 是             | 消息监听                    |
 | IMqttConnectStatusListener    | 是             | 连接状态监听                 |
 | IMqttSessionManager           | 否             | session 管理               |