[ISSUE #8358] Client does not send heartbeats to all Nameserve in clustered mode, resulting in frequent disconnections

client/src/main/java/org/apache/rocketmq/client/impl/factory/MQClientInstance.java

@@ -152,6 +152,7 @@ public MQClientInstance(ClientConfig clientConfig, int instanceIndex, String cli
         this.nettyClientConfig.setClientCallbackExecutorThreads(clientConfig.getClientCallbackExecutorThreads());
         this.nettyClientConfig.setUseTLS(clientConfig.isUseTLS());
         this.nettyClientConfig.setSocksProxyConfig(clientConfig.getSocksProxyConfig());
+        this.nettyClientConfig.setScanAvailableNameSrv(false);
         ClientRemotingProcessor clientRemotingProcessor = new ClientRemotingProcessor(this);
         ChannelEventListener channelEventListener;
         if (clientConfig.isEnableHeartbeatChannelEventListener()) {

remoting/src/main/java/org/apache/rocketmq/remoting/netty/NettyClientConfig.java

@@ -31,6 +31,8 @@ public class NettyClientConfig {
     private int connectTimeoutMillis = NettySystemConfig.connectTimeoutMillis;
     private long channelNotActiveInterval = 1000 * 60;
 
+    private boolean isScanAvailableNameSrv = true;
+
     /**
      * IdleStateEvent will be triggered when neither read nor write was performed for
      * the specified period of this time. Specify {@code 0} to disable
@@ -218,4 +220,12 @@ public String getSocksProxyConfig() {
     public void setSocksProxyConfig(String socksProxyConfig) {
         this.socksProxyConfig = socksProxyConfig;
     }
+
+    public boolean isScanAvailableNameSrv() {
+        return isScanAvailableNameSrv;
+    }
+
+    public void setScanAvailableNameSrv(boolean scanAvailableNameSrv) {
+        this.isScanAvailableNameSrv = scanAvailableNameSrv;
+    }
 }

remoting/src/main/java/org/apache/rocketmq/remoting/netty/NettyRemotingClient.java

@@ -251,20 +251,24 @@ public void run(Timeout timeout) {
         };
         this.timer.newTimeout(timerTaskScanResponseTable, 1000 * 3, TimeUnit.MILLISECONDS);
 
-        int connectTimeoutMillis = this.nettyClientConfig.getConnectTimeoutMillis();
-        TimerTask timerTaskScanAvailableNameSrv = new TimerTask() {
-            @Override
-            public void run(Timeout timeout) {
-                try {
-                    NettyRemotingClient.this.scanAvailableNameSrv();
-                } catch (Exception e) {
-                    LOGGER.error("scanAvailableNameSrv exception", e);
-                } finally {
-                    timer.newTimeout(this, connectTimeoutMillis, TimeUnit.MILLISECONDS);
+        if (nettyClientConfig.isScanAvailableNameSrv()) {
+            int connectTimeoutMillis = this.nettyClientConfig.getConnectTimeoutMillis();
+            TimerTask timerTaskScanAvailableNameSrv = new TimerTask() {
+                @Override
+                public void run(Timeout timeout) {
+                    try {
+                        NettyRemotingClient.this.scanAvailableNameSrv();
+                    } catch (Exception e) {
+                        LOGGER.error("scanAvailableNameSrv exception", e);
+                    } finally {
+                        timer.newTimeout(this, connectTimeoutMillis, TimeUnit.MILLISECONDS);
+                    }
                 }
-            }
-        };
-        this.timer.newTimeout(timerTaskScanAvailableNameSrv, 0, TimeUnit.MILLISECONDS);
+            };
+            this.timer.newTimeout(timerTaskScanAvailableNameSrv, 0, TimeUnit.MILLISECONDS);
+        }
+
+
     }
 
     private Map.Entry<String, SocksProxyConfig> getProxy(String addr) {