apollo-common/src/main/java/com/ctrip/framework/apollo/common/customize/LoggingCustomizer.java/LoggingCustomizer/afterPropertiesSet
class LoggingCustomizer:  @Override
  public void afterPropertiesSet() {
    if (!cLoggingAppenderPresent) {
      return;
    }

    try {
      tryConfigCLogging();
    } catch (Throwable ex) {
      logger.error("Config CLogging failed", ex);
      Tracer.logError(ex);
    }

  }