EventPublishingServiceDiscovery add error log

[lkxiaolou]

What is the purpose of the change

to solve #8061

such as

2021-06-16 16:58:02,210 [main] ERROR org.apache.dubbo.registry.client.EventPublishingServiceDiscovery (EventPublishingServiceDiscovery.java:287) -  [DUBBO] Execute action throws and dispatch a ServiceDiscoveryExceptionEvent, dubbo version: 2.7.12, current host: 172.23.233.52
java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: org/apache/curator/x/discovery/ServiceDiscovery
	at org.apache.dubbo.registry.zookeeper.ZookeeperServiceDiscovery.doRegister(ZookeeperServiceDiscovery.java:92)
	at org.apache.dubbo.registry.client.AbstractServiceDiscovery.register(AbstractServiceDiscovery.java:33)
	at org.apache.dubbo.registry.client.EventPublishingServiceDiscovery.lambda$register$0(EventPublishingServiceDiscovery.java:159)
	at org.apache.dubbo.registry.client.EventPublishingServiceDiscovery.executeWithEvents(EventPublishingServiceDiscovery.java:285)
	at org.apache.dubbo.registry.client.EventPublishingServiceDiscovery.register(EventPublishingServiceDiscovery.java:157)
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.lambda$doRegisterServiceInstance$21(DubboBootstrap.java:1192)
	at java.util.ArrayList.forEach(ArrayList.java:1259)
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.doRegisterServiceInstance(DubboBootstrap.java:1185)
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.registerServiceInstance(DubboBootstrap.java:1163)
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.start(DubboBootstrap.java:892)
	at org.apache.dubbo.config.spring.context.DubboBootstrapApplicationListener.onContextRefreshedEvent(DubboBootstrapApplicationListener.java:70)
	at org.apache.dubbo.config.spring.context.DubboBootstrapApplicationListener.onApplicationContextEvent(DubboBootstrapApplicationListener.java:63)
	at com.alibaba.spring.context.OnceApplicationContextEventListener.onApplicationEvent(OnceApplicationContextEventListener.java:52)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:404)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:361)
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:898)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:554)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
	at com.didichuxing.provider.Provider.main(Provider.java:16)
Caused by: java.lang.NoClassDefFoundError: org/apache/curator/x/discovery/ServiceDiscovery
	... 28 more
Caused by: java.lang.ClassNotFoundException: org.apache.curator.x.discovery.ServiceDiscovery
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
	... 28 more
2021-06-16 16:58:02,211 [main] INFO  dubbo.registry.client.event.listener.LoggingEventListener (LoggingEventListener.java:82) -  [DUBBO] DefaultServiceInstance{id='172.23.233.52:20880', serviceName='ddog-my-demo-p0', host='172.23.233.52', port=20880, enabled=true, healthy=true, metadata={dubbo.metadata-service.url-params={"dubbo":{"version":"1.0.0","dubbo":"2.0.2","release":"2.7.12","port":"20881"}}, dubbo.endpoints=[{"port":20880,"protocol":"dubbo"}], dubbo.metadata.revision=8493DD40425FC5C216651D0B576A621B, dubbo.metadata.storage-type=local}} has been registered into org.apache.dubbo.registry.zookeeper.ZookeeperServiceDiscovery@2f37f1f9., dubbo version: 2.7.12, current host: 172.23.233.52
2021-06-16 16:58:02,213 [Dubbo-framework-scheduler-thread-1] ERROR org.apache.dubbo.config.bootstrap.DubboBootstrap (DubboBootstrap.java:1172) -  [DUBBO] refresh metadata and instance failed, dubbo version: 2.7.12, current host: 172.23.233.52
java.lang.NullPointerException
	at org.apache.dubbo.registry.client.metadata.ServiceInstanceMetadataUtils.calInstanceRevision(ServiceInstanceMetadataUtils.java:249)
	at org.apache.dubbo.registry.client.metadata.ServiceInstanceMetadataUtils.lambda$refreshMetadataAndInstance$6(ServiceInstanceMetadataUtils.java:272)
	at java.util.ArrayList.forEach(ArrayList.java:1259)
	at org.apache.dubbo.registry.client.metadata.ServiceInstanceMetadataUtils.refreshMetadataAndInstance(ServiceInstanceMetadataUtils.java:271)
	at org.apache.dubbo.config.bootstrap.DubboBootstrap.lambda$registerServiceInstance$20(DubboBootstrap.java:1170)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

[codecov-commenter]

Codecov Report

Merging #8066 (1a70092) into master (8892a36) will increase coverage by 0.06%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #8066      +/-   ##
============================================
+ Coverage     61.16%   61.22%   +0.06%     
  Complexity      491      491              
============================================
  Files          1091     1091              
  Lines         43953    43954       +1     
  Branches       6417     6417              
============================================
+ Hits          26882    26909      +27     
+ Misses        14088    14061      -27     
- Partials       2983     2984       +1     

Impacted Files	Coverage Δ
...gistry/client/EventPublishingServiceDiscovery.java	72.83% <0.00%> (-0.92%)	⬇️
...ting/exchange/support/header/HeartbeatHandler.java	90.69% <0.00%> (-2.33%)	⬇️
...apache/dubbo/common/extension/ExtensionLoader.java	81.23% <0.00%> (+0.42%)	⬆️
...g/apache/dubbo/registry/consul/ConsulRegistry.java	60.58% <0.00%> (+0.58%)	⬆️
...he/dubbo/registry/multicast/MulticastRegistry.java	70.23% <0.00%> (+0.93%)	⬆️
...ting/zookeeper/curator/CuratorZookeeperClient.java	70.68% <0.00%> (+1.14%)	⬆️
...e/dubbo/remoting/transport/netty4/NettyClient.java	71.01% <0.00%> (+1.44%)	⬆️
.../dubbo/remoting/transport/netty4/NettyChannel.java	64.35% <0.00%> (+1.98%)	⬆️
...rg/apache/dubbo/rpc/protocol/dubbo/DubboCodec.java	74.10% <0.00%> (+3.57%)	⬆️
...dubbo/remoting/exchange/support/DefaultFuture.java	87.17% <0.00%> (+6.83%)	⬆️
... and 1 more

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