try {
            // printThreadDump()
            java.lang.reflect.Method printMethod = ThreadDumpUtil.class.getMethod("printThreadDump");
            assertTrue("printThreadDump should be static", java.lang.reflect.Modifier.isStatic(printMethod.getModifiers()));
            assertTrue("printThreadDump should be public", java.lang.reflect.Modifier.isPublic(printMethod.getModifiers()));

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

                    finishCrawling = true;
                    forceStop();
                    if (fessConfig.getIndexerThreadDumpEnabledAsBoolean()) {
                        ThreadDumpUtil.printThreadDump();
                    }
                    org.codelibs.fess.exec.Crawler.addError("QueueTimeout");
                }

                if (!ComponentUtil.available()) {