} catch (final IOException e) {
                    throw new IORuntimeException(e);
                }
            });
        } catch (final Exception e) {
            logger.warn("Failed to write a thread dump to {}", file, e);
        }
    }

    public static void processThreadDump(final Consumer<String> writer) {
        for (final Map.Entry<Thread, StackTraceElement[]> entry : Thread.getAllStackTraces().entrySet()) {

    public static final String ERRORS_unauthorized_request = "{errors.unauthorized_request}";

    /** The key of the message: Failed to print thread dump. */
    public static final String ERRORS_failed_to_print_thread_dump = "{errors.failed_to_print_thread_dump}";

    /** The key of the message: {0} is not supported. */
    public static final String ERRORS_file_is_not_supported = "{errors.file_is_not_supported}";

    String CRAWLER_DOCUMENT_CACHE_HTML_MIMETYPES = "crawler.document.cache.html.mimetypes";

    /** The key of the configuration. e.g. true */
    String INDEXER_THREAD_DUMP_ENABLED = "indexer.thread.dump.enabled";

    /** The key of the configuration. e.g. 1000 */
    String INDEXER_UNPROCESSED_DOCUMENT_SIZE = "indexer.unprocessed.document.size";

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

    public static final String SYSTEM_USER = "system";

    public static final String EMPTY_USER_ID = "<empty>";

    public static final String CRAWLER_PROCESS_COMMAND_THREAD_DUMP = "thread_dump";

    public static final String FESS_THUMBNAIL_PATH = "fess.thumbnail.path";

    public static final String FESS_VAR_PATH = "fess.var.path";

                                logger.debug("Process command: {}", command);
                            }
                            if (Constants.CRAWLER_PROCESS_COMMAND_THREAD_DUMP.equals(command)) {
                                ThreadDumpUtil.printThreadDump();
                            } else {
                                logger.warn("Unknown process command: {}", command);

    public static final String LABELS_crawling_info_delete_all_cancel = "{labels.crawling_info_delete_all_cancel}";

    /** The key of the message: Thread Dump */
    public static final String LABELS_crawling_info_thread_dump = "{labels.crawling_info_thread_dump}";

    /** The key of the message: Crawler start time */
    public static final String LABELS_crawling_info_CrawlerStartTime = "{labels.crawling_info_CrawlerStartTime}";

            try {
                processHelper.sendCommand(entity.getSessionId(), Constants.CRAWLER_PROCESS_COMMAND_THREAD_DUMP);
                saveInfo(messages -> messages.addSuccessPrintThreadDump(GLOBAL));
            } catch (final Exception e) {
                logger.warn("Failed to print a thread dump.", e);
                throwValidationError(messages -> messages.addErrorsFailedToPrintThreadDump(GLOBAL), this::asListHtml);