if (line.length() == 0 || line.charAt(0) == '#') {
                    if (updater != null) {
                        updater.write(line);
                    }
                    continue; // ignore empty lines and comments
                }

                String[] inputs;
                String[] outputs;

                final List<String> sides = split(line, "=>");

                if (line.length() == 0 || line.charAt(0) == '#') {
                    if (updater != null) {
                        updater.write(line);
                    }
                    continue; // ignore empty lines and comments
                }

                final String inputStrings = line;
                final String input = unescape(inputStrings);

                if (input.length() > 0) {

crawler.web.protocols=http,https
crawler.file.protocols=file,smb,smb1,ftp,storage
crawler.data.env.param.key.pattern=^FESS_ENV_.*
crawler.ignore.robots.txt=false
crawler.ignore.robots.tags=false
crawler.ignore.content.exception=true
crawler.failure.url.status.codes=404
crawler.system.monitor.interval=60
crawler.hotthread.ignore_idle_threads=true
crawler.hotthread.interval=500ms
crawler.hotthread.snapshots=10
crawler.hotthread.threads=3

    /** The key of the configuration. e.g. false */
    String CRAWLER_IGNORE_ROBOTS_TXT = "crawler.ignore.robots.txt";

    /** The key of the configuration. e.g. false */
    String CRAWLER_IGNORE_ROBOTS_TAGS = "crawler.ignore.robots.tags";

    /** The key of the configuration. e.g. true */
    String CRAWLER_IGNORE_CONTENT_EXCEPTION = "crawler.ignore.content.exception";

    /** The key of the configuration. e.g. 404 */

            return null;
        }

        @Override
        public void close() {
            try {
                writer.flush();
            } catch (final IOException e) {
                // ignore
            }
            CloseableUtil.closeQuietly(writer);

            if (isCommit) {
                try {
                    dictionaryManager.store(StemmerOverrideFile.this, newFile);

                    // remove
                    String[] ignoreFields;
                    if (paramMap.containsKey("ignore.field.names")) {
                        ignoreFields = ((String) paramMap.get("ignore.field.names")).split(",");
                    } else {
                        ignoreFields = new String[] { Constants.INDEXING_TARGET, Constants.SESSION_ID };
                    }

                cause.printStackTrace(pw);
                pw.flush();
                sb.append(" [ ").append(sw.toString()).append(" ]");
            } catch (final IOException ignore) {}
            return sb.toString();
        };

        if (Constants.TRUE.equalsIgnoreCase(ComponentUtil.getFessConfig().getApiJsonResponseExceptionIncluded())) {
            return stacktraceString.get();

            return p.substring(GsaConfigParser.REGEXP_CASE.length());
        }

        if (p.startsWith(GsaConfigParser.REGEXP_IGNORE_CASE)) {
            return "(?i)" + p.substring(GsaConfigParser.REGEXP_IGNORE_CASE.length());
        }

        return p;
    }

    public String getForumLink() {
        final String url = ComponentUtil.getFessConfig().getForumLink();

            if ((webinfPath != null) && Files.exists(Paths.get(webinfPath))) {
                return Paths.get(webinfPath, names);
            }
        } catch (final Throwable e) {
            // ignore
        }
        final String webinfBase = root + base;
        if (Files.exists(Paths.get(webinfBase))) {
            return Paths.get(webinfBase, names);
        }

                try {
                    requestManager.findLoginManager(FessUserBean.class).ifPresent(LoginManager::logout);
                } catch (final Exception e1) {
                    // ignore
                }
                throw e;
            }
        }

        if (defaultRoleList != null) {
            roleSet.addAll(defaultRoleList);
        }