code: private void toBeNormal(Invoker<?> invoker, Invocation invocation){
          String interfaceName = invoker.getUrl().getParameter(Constants.INTERFACE_KEY);
          String method = invocation.getMethodName();
          StringBuffer methodConfig = new StringBuffer(Config.DUBBO_REFERENCE_PREFIX);
          methodConfig.append(interfaceName).append(".").append(method);
          String methodKey = methodConfig.toString();
          //从其中删除对应的异常计数器
          BreakCounter counter = breakCounterMap.remove(methodKey);
          if(counter!=null){
              logger.info("[{}] [{}.{}] to be normal",localHost,interfaceName,methodKey);
              //将这个counter设置为失效
              counter.disable();
          }
      }
docs: 将服务恢复正常
  @param invoker
  @param invocation