docs: update

Author: caojiajun

camellia-redis-proxy/camellia-redis-proxy-extensions/camellia-redis-proxy-hot-key-server/src/main/java/com/netease/nim/camellia/redis/proxy/hotkeyserver/monitor/HotKeyServerMonitorPlugin.java

@@ -27,7 +27,7 @@ public class HotKeyServerMonitorPlugin implements ProxyPlugin {
 
     @Override
     public void init(ProxyBeanFactory factory) {
-        String className = BeanInitUtils.getClassName("hot.key.server.discovery", CamelliaDiscoveryFactory.class.getName());
+        String className = BeanInitUtils.getClassName("hot.key.server.discovery.factory", CamelliaDiscoveryFactory.class.getName());
         String name = ProxyDynamicConf.getString("hot.key.server.name", null);
 
         CamelliaDiscoveryFactory discoveryFactory;

camellia-toolkits/camellia-naming/camellia-naming-core/src/main/java/com/netease/nim/camellia/naming/core/CamelliaNamingDiscovery.java

@@ -65,6 +65,8 @@ public void remove(List<InstanceInfo> list) {
     @Override
     public void clearCallback(Callback callback) {
         String id = callbackMap.remove(callback);
-        namingService.unsubscribe(serviceName, id);
+        if (id != null) {
+            namingService.unsubscribe(serviceName, id);
+        }
     }
 }