code: public static void handleException(final Exception cause) {
          if (null == cause) {
              return;
          }
          if (isIgnoredException(cause) || null != cause.getCause() && isIgnoredException(cause.getCause())) {
              log.debug("Ignored exception for: {}", cause.getMessage());
          } else if (cause instanceof InterruptedException) {
              Thread.currentThread().interrupt();
          } else {
              throw new RegistryCenterException(cause);
          }
      }
docs: Handle exception.
  
  <p>Ignore interrupt and connection invalid exception.</p>
  
  @param cause to be handled exception