[ISSUE #3628] set naming client updateTask interval more flexible (#3637

)

* 1.use server cacheMillis event service deleted
2.naming client UpdateTask's interval will inc by failCount that connect with server

* 1.move failCount to updateTask
2.redefine the updateService method name. updateServiceNow -> updateService, wrap updateService in updateServiceNow when first getServiceInfo

* 1.create push client even service is not exist
2.serviceInfo's hosts is empty or can't connect to server both add the updateTsk interval

* format the indent

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

@@ -25,6 +25,7 @@
 import com.alibaba.nacos.client.naming.beat.BeatReactor;
 import com.alibaba.nacos.client.naming.cache.DiskCache;
 import com.alibaba.nacos.client.naming.net.NamingProxy;
+import com.alibaba.nacos.client.naming.utils.CollectionUtils;
 import com.alibaba.nacos.client.naming.utils.UtilAndComs;
 import com.alibaba.nacos.common.lifecycle.Closeable;
 import com.alibaba.nacos.common.utils.JacksonUtils;
@@ -296,6 +297,14 @@ public ServiceInfo getServiceInfo(final String serviceName, final String cluster
  return serviceInfoMap.get(serviceObj.getKey());
  }
 
+ private void updateServiceNow(String serviceName, String clusters) {
+ try {
+ updateService(serviceName, clusters);
+ } catch (NacosException e) {
+ NAMING_LOGGER.error("[NA] failed to update serviceName: " + serviceName, e);
+ }
+ }
+
  /**
  * Schedule update if absent.
  *
@@ -323,7 +332,7 @@ public void scheduleUpdateIfAbsent(String serviceName, String clusters) {
  * @param serviceName service name
  * @param clusters clusters
  */
- public void updateServiceNow(String serviceName, String clusters) {
+ public void updateService(String serviceName, String clusters) throws NacosException {
  ServiceInfo oldService = getServiceInfo0(serviceName, clusters);
  try {
 
@@ -332,8 +341,6 @@ public void updateServiceNow(String serviceName, String clusters) {
  if (StringUtils.isNotEmpty(result)) {
  processServiceJson(result);
  }
- } catch (Exception e) {
- NAMING_LOGGER.error("[NA] failed to update serviceName: " + serviceName, e);
  } finally {
  if (oldService != null) {
  synchronized (oldService) {
@@ -375,26 +382,42 @@ public class UpdateTask implements Runnable {
 
  private final String serviceName;
 
+ /**
+ * the fail situation. 1:can't connect to server 2:serviceInfo's hosts is empty
+ */
+ private int failCount = 0;
+
  public UpdateTask(String serviceName, String clusters) {
  this.serviceName = serviceName;
  this.clusters = clusters;
  }
 
+ private void incFailCount() {
+ int limit = 6;
+ if (failCount == limit) {
+ return;
+ }
+ failCount++;
+ }
+
+ private void resetFailCount() {
+ failCount = 0;
+ }
+
  @Override
  public void run() {
- long delayTime = -1;
+ long delayTime = DEFAULT_DELAY;
 
  try {
  ServiceInfo serviceObj = serviceInfoMap.get(ServiceInfo.getKey(serviceName, clusters));
 
  if (serviceObj == null) {
- updateServiceNow(serviceName, clusters);
- delayTime = DEFAULT_DELAY;
+ updateService(serviceName, clusters);
  return;
  }
 
  if (serviceObj.getLastRefTime() <= lastRefTime) {
- updateServiceNow(serviceName, clusters);
+ updateService(serviceName, clusters);
  serviceObj = serviceInfoMap.get(ServiceInfo.getKey(serviceName, clusters));
  } else {
  // if serviceName already updated by push, we should not override it
@@ -410,17 +433,18 @@ public void run() {
  NAMING_LOGGER.info("update task is stopped, service:" + serviceName + ", clusters:" + clusters);
  return;
  }
-
+ if (CollectionUtils.isEmpty(serviceObj.getHosts())) {
+ incFailCount();
+ return;
+ }
  delayTime = serviceObj.getCacheMillis();
-
+ resetFailCount();
  } catch (Throwable e) {
+ incFailCount();
  NAMING_LOGGER.warn("[NA] failed to update serviceName: " + serviceName, e);
  } finally {
- if (delayTime > 0) {
- executor.schedule(this, delayTime, TimeUnit.MILLISECONDS);
- }
+ executor.schedule(this, Math.min(delayTime << failCount, DEFAULT_DELAY * 60), TimeUnit.MILLISECONDS);
  }
-
  }
  }
 }

naming/src/main/java/com/alibaba/nacos/naming/controllers/InstanceController.java

@@ -516,19 +516,6 @@ public ObjectNode doSrvIpxt(String namespaceId, String serviceName, String agent
  ClientInfo clientInfo = new ClientInfo(agent);
  ObjectNode result = JacksonUtils.createEmptyJsonNode();
  Service service = serviceManager.getService(namespaceId, serviceName);
-
- if (service == null) {
- if (Loggers.SRV_LOG.isDebugEnabled()) {
- Loggers.SRV_LOG.debug("no instance to serve for service: {}", serviceName);
- }
- result.put("name", serviceName);
- result.put("clusters", clusters);
- result.replace("hosts", JacksonUtils.createEmptyArrayNode());
- return result;
- }
-
- checkIfDisabled(service);
-
  long cacheMillis = switchDomain.getDefaultCacheMillis();
 
  // now try to enable the push
@@ -546,6 +533,19 @@ public ObjectNode doSrvIpxt(String namespaceId, String serviceName, String agent
  cacheMillis = switchDomain.getDefaultCacheMillis();
  }
 
+ if (service == null) {
+ if (Loggers.SRV_LOG.isDebugEnabled()) {
+ Loggers.SRV_LOG.debug("no instance to serve for service: {}", serviceName);
+ }
+ result.put("name", serviceName);
+ result.put("clusters", clusters);
+ result.put("cacheMillis", cacheMillis);
+ result.replace("hosts", JacksonUtils.createEmptyArrayNode());
+ return result;
+ }
+
+ checkIfDisabled(service);
+
  List<Instance> srvedIPs;
 
  srvedIPs = service.srvIPs(Arrays.asList(StringUtils.split(clusters, ",")));