public String appendQueryParameter;

    /** The login required setting. */
    public String loginRequired;

    /** The ignore failure type setting. */
    public String ignoreFailureType;

    /** The failure count threshold setting. */
    public String failureCountThreshold;

    /** The popular word setting. */
    public String popularWord;

    /** The CSV file encoding setting. */

        fessConfig.setVirtualHostValue(form.virtualHostValue);
        fessConfig.setAppendQueryParameter(isCheckboxEnabled(form.appendQueryParameter));
        fessConfig.setIgnoreFailureType(form.ignoreFailureType);
        fessConfig.setFailureCountThreshold(form.failureCountThreshold);
        fessConfig.setWebApiPopularWord(isCheckboxEnabled(form.popularWord));
        fessConfig.setCsvFileEncoding(form.csvFileEncoding);

        });
        if (list.isEmpty()) {
            return Collections.emptyList();
        }

        Pattern pattern = null;
        if (StringUtil.isNotBlank(ignoreFailureType)) {
            pattern = Pattern.compile(ignoreFailureType);
        }
        final List<String> urlList = new ArrayList<>();
        for (final FailureUrl failureUrl : list) {
            if (pattern != null) {

    /**
     * Types of crawling failures to ignore during crawling operations.
     * Specified failure types will not be logged or counted as errors.
     */
    @Size(max = 1000)
    public String ignoreFailureType;

    /**
     * Threshold for failure count before stopping crawling of a URL.
     * Set to -1 to disable the threshold check.
     */
    @Required
    @Min(-1)
    @Max(10000)