* normalizing configurations, and other system-related tasks.
 */
public class SystemHelper {

    /**
     * Constructs a new system helper.
     */
    public SystemHelper() {
        // do nothing
    }

    private static final Logger logger = LogManager.getLogger(SystemHelper.class);

    /** A map of design JSP file names. */

     */
    protected void waitForYellowStatus(final FessConfig fessConfig) {
        Exception cause = null;
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        final long startTime = systemHelper.getCurrentTimeAsLong();
        for (int i = 0; i < maxEsStatusRetry; i++) {
            try {
                final ClusterHealthResponse response = client.admin()