@NotNull
  @VisibleForTesting
  protected Long getSystemProperty(String key, long defaultValue) {
    return SystemProperty.getProductLongProperty(key, defaultValue);
  }
for old client, don't wait for re-auth but unregister this proxy completely.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/MessageDispatcher.java