fix #587

api/src/main/java/com/alibaba/nacos/api/PropertyKeyConst.java

@@ -31,5 +31,7 @@ public class PropertyKeyConst {
     public final static String CLUSTER_NAME = "clusterName";
     public final static String ENCODE = "encode";
     public final static String NAMING_LOAD_CACHE_AT_START = "namingLoadCacheAtStart";
+    public final static String NAMING_CLIENT_BEAT_THREAD_COUNT = "namingClientBeatThreadCount";
+    public final static String NAMING_POLLING_THREAD_COUNT = "namingPollingThreadCount";
 
 }

client/src/main/java/com/alibaba/nacos/client/naming/NacosNamingService.java

@@ -35,6 +35,7 @@ import com.alibaba.nacos.client.naming.utils.LogUtils;
 import com.alibaba.nacos.client.naming.utils.StringUtils;
 import com.alibaba.nacos.client.naming.utils.UtilAndComs;
 import org.apache.commons.lang3.BooleanUtils;
+import org.apache.commons.lang3.math.NumberUtils;
 
 import java.util.ArrayList;
 import java.util.Iterator;
@@ -101,7 +102,7 @@ public class NacosNamingService implements NamingService {
         eventDispatcher = new EventDispatcher();
         serverProxy = new NamingProxy(namespace, endpoint, serverList);
         beatReactor = new BeatReactor(serverProxy);
-        hostReactor = new HostReactor(eventDispatcher, serverProxy, cacheDir, false);
+        hostReactor = new HostReactor(eventDispatcher, serverProxy, cacheDir);
     }
 
     public NacosNamingService(Properties properties) {
@@ -131,10 +132,16 @@ public class NacosNamingService implements NamingService {
                 properties.getProperty(PropertyKeyConst.NAMING_LOAD_CACHE_AT_START));
         }
 
+        int clientBeatThreadCount = NumberUtils.toInt(properties.getProperty(PropertyKeyConst.NAMING_CLIENT_BEAT_THREAD_COUNT),
+            UtilAndComs.DEFAULT_CLIENT_BEAT_THREAD_COUNT);
+
+        int pollingThreadCount = NumberUtils.toInt(properties.getProperty(PropertyKeyConst.NAMING_POLLING_THREAD_COUNT),
+            UtilAndComs.DEFAULT_POLLING_THREAD_COUNT);
+
         eventDispatcher = new EventDispatcher();
         serverProxy = new NamingProxy(namespace, endpoint, serverList);
-        beatReactor = new BeatReactor(serverProxy);
+        beatReactor = new BeatReactor(serverProxy, clientBeatThreadCount);
-        hostReactor = new HostReactor(eventDispatcher, serverProxy, cacheDir, loadCacheAtStart);
+        hostReactor = new HostReactor(eventDispatcher, serverProxy, cacheDir, loadCacheAtStart, pollingThreadCount);
 
     }
 

client/src/main/java/com/alibaba/nacos/client/naming/beat/BeatReactor.java

@@ -18,6 +18,7 @@ package com.alibaba.nacos.client.naming.beat;
 import com.alibaba.nacos.api.common.Constants;
 import com.alibaba.nacos.client.naming.net.NamingProxy;
 import com.alibaba.nacos.client.naming.utils.LogUtils;
+import com.alibaba.nacos.client.naming.utils.UtilAndComs;
 
 import java.util.Map;
 import java.util.concurrent.*;
@@ -27,15 +28,7 @@ import java.util.concurrent.*;
  */
 public class BeatReactor {
 
-    private ScheduledExecutorService executorService = new ScheduledThreadPoolExecutor(1, new ThreadFactory() {
+    private ScheduledExecutorService executorService;
-        @Override
-        public Thread newThread(Runnable r) {
-            Thread thread = new Thread(r);
-            thread.setDaemon(true);
-            thread.setName("com.alibaba.nacos.naming.beat.sender");
-            return thread;
-        }
-    });
 
     private long clientBeatInterval = 5 * 1000;
 
@@ -44,7 +37,22 @@ public class BeatReactor {
     public final Map<String, BeatInfo> dom2Beat = new ConcurrentHashMap<String, BeatInfo>();
 
     public BeatReactor(NamingProxy serverProxy) {
+        this(serverProxy, UtilAndComs.DEFAULT_CLIENT_BEAT_THREAD_COUNT);
+    }
+
+    public BeatReactor(NamingProxy serverProxy, int threadCount) {
         this.serverProxy = serverProxy;
+
+        executorService = new ScheduledThreadPoolExecutor(threadCount, new ThreadFactory() {
+            @Override
+            public Thread newThread(Runnable r) {
+                Thread thread = new Thread(r);
+                thread.setDaemon(true);
+                thread.setName("com.alibaba.nacos.naming.beat.sender");
+                return thread;
+            }
+        });
+
         executorService.scheduleAtFixedRate(new BeatProcessor(), 0, clientBeatInterval, TimeUnit.MILLISECONDS);
     }
 

client/src/main/java/com/alibaba/nacos/client/naming/core/HostReactor.java

@@ -16,14 +16,12 @@
 package com.alibaba.nacos.client.naming.core;
 
 import com.alibaba.fastjson.JSON;
-import com.alibaba.nacos.api.common.Constants;
 import com.alibaba.nacos.api.naming.pojo.Instance;
 import com.alibaba.nacos.api.naming.pojo.ServiceInfo;
 import com.alibaba.nacos.client.naming.backups.FailoverReactor;
 import com.alibaba.nacos.client.naming.cache.DiskCache;
 import com.alibaba.nacos.client.naming.net.NamingProxy;
 import com.alibaba.nacos.client.naming.utils.LogUtils;
-import com.alibaba.nacos.client.naming.utils.NetUtils;
 import com.alibaba.nacos.client.naming.utils.StringUtils;
 import com.alibaba.nacos.client.naming.utils.UtilAndComs;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
@@ -56,8 +54,25 @@ public class HostReactor {
 
     private String cacheDir;
 
+    private ScheduledExecutorService executor;
+
+    public HostReactor(EventDispatcher eventDispatcher, NamingProxy serverProxy, String cacheDir) {
+        this(eventDispatcher, serverProxy, cacheDir, false, UtilAndComs.DEFAULT_POLLING_THREAD_COUNT);
+    }
+
     public HostReactor(EventDispatcher eventDispatcher, NamingProxy serverProxy, String cacheDir,
-                       boolean loadCacheAtStart) {
+                       boolean loadCacheAtStart, int pollingThreadCount) {
+
+        executor = new ScheduledThreadPoolExecutor(pollingThreadCount, new ThreadFactory() {
+            @Override
+            public Thread newThread(Runnable r) {
+                Thread thread = new Thread(r);
+                thread.setDaemon(true);
+                thread.setName("com.alibaba.nacos.client.naming.updater");
+                return thread;
+            }
+        });
+
         this.eventDispatcher = eventDispatcher;
         this.serverProxy = serverProxy;
         this.cacheDir = cacheDir;
@@ -72,16 +87,6 @@ public class HostReactor {
         this.pushRecver = new PushRecver(this);
     }
 
-    private ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor(new ThreadFactory() {
-        @Override
-        public Thread newThread(Runnable r) {
-            Thread thread = new Thread(r, "com.alibaba.nacos.client.naming.updater");
-            thread.setDaemon(true);
-
-            return thread;
-        }
-    });
-
     public Map<String, ServiceInfo> getServiceInfoMap() {
         return serviceInfoMap;
     }

client/src/main/java/com/alibaba/nacos/client/naming/utils/UtilAndComs.java

@@ -45,4 +45,10 @@ public class UtilAndComs {
     public static final String NACOS_NAMING_LOG_LEVEL = "com.alibaba.nacos.naming.log.level";
 
     public static final String SERVER_ADDR_IP_SPLITER = ":";
+
+    public static final int DEFAULT_CLIENT_BEAT_THREAD_COUNT = Runtime.getRuntime().availableProcessors() > 1 ?
+        Runtime.getRuntime().availableProcessors() / 2 : 1;
+
+    public static final int DEFAULT_POLLING_THREAD_COUNT = Runtime.getRuntime().availableProcessors() > 1 ?
+        Runtime.getRuntime().availableProcessors() / 2 : 1;
 }