### Go-Live

- [ ] Schedule maintenance window
- [ ] Final incremental data sync
- [ ] Switch DNS or endpoints to Fess
- [ ] Monitor logs for errors
- [ ] Monitor search performance metrics
- [ ] Have rollback plan ready

### Post-Migration

- [ ] Monitor search quality and relevance
- [ ] Tune ranking and boosting settings
- [ ] Set up regular crawl schedules
- [ ] Configure backup and disaster recovery

        this.cleanupExecutor = Executors.newSingleThreadScheduledExecutor(r -> {
            Thread t = new Thread(r, "LeaseManager-Cleanup");
            t.setDaemon(true);
            return t;
        });

        // Schedule periodic cleanup
        long cleanupInterval = context.getConfig().getLeaseTimeout();
        if (cleanupInterval <= 0) {
            cleanupInterval = DEFAULT_LEASE_CLEANUP_INTERVAL;
        }

        this.keyRotationIntervalMillis = intervalMillis;

        // Cancel existing rotation task if any
        if (rotationTask != null) {
            rotationTask.cancel(false);
        }

        // Schedule new rotation task
        if (intervalMillis > 0) {
            rotationTask = rotationScheduler.scheduleWithFixedDelay(this::rotateExpiredKeys, intervalMillis, intervalMillis,

            log.error("Failed to create handle state directory", e);
        }
        
        // Load persisted handles on startup
        loadPersistedHandles();
        
        // Schedule periodic persistence
        scheduler.scheduleAtFixedRate(this::persistHandles, 30, 30, TimeUnit.SECONDS);
    }
    
    public static class HandleInfo implements Serializable {
        private static final long serialVersionUID = 1L;

    override fun contentType() = delegate.contentType()

    override fun isDuplex() = true

    override fun writeTo(sink: BufferedSink) {
      executorService.schedule({
        try {
          delegate.writeTo(sink)
          sink.close()
        } catch (e: IOException) {
          throw RuntimeException(e)
        }
      }, delayMillis, TimeUnit.MILLISECONDS)
    }

    Future<?> scheduled = executorService.schedule(task, delay, timeUnit);
    /*
     * Even when the user interrupts the task, we pass `false` to `cancel` so that we don't
     * interrupt a second time after the interruption performed by TrustedListenableFutureTask.
     */
    task.addListener(() -> scheduled.cancel(false), directExecutor());
    return task;
  }

  /**

labels.excluded_doc_urls=要從搜尋中排除的URL
labels.user_agent=使用者代理
labels.web_crawling_button_create=建立
labels.web_crawling_button_create_job=建立新作業
labels.crawler_configuration=通用設定
labels.crawler_title_edit=通用設定
labels.schedule=排程
labels.enabled=啟用
labels.day_for_cleanup=刪除以前的文檔
labels.day=天
labels.crawl_button_update=更新
labels.none=無
labels.crawling_thread_count=同時爬蟲設定
labels.incremental_crawling=檢查上次修改時間

labels.web_crawling_button_create=Erstellen
labels.web_crawling_button_create_job=Neuen Job erstellen
labels.crawler_configuration=Allgemeine Konfiguration
labels.crawler_title_edit=Allgemeine Konfiguration
labels.schedule=Zeitplan
labels.enabled=Aktiviert
labels.day_for_cleanup=Alte Dokumente löschen
labels.day=Tage
labels.crawl_button_update=Aktualisieren
labels.none=Keine

/docker/k8s-artifacts-prod/southamerica-east1/images/kube-scheduler) | [amd64](https://console.cloud.google.com/artifacts/docker/k8s-artifacts-prod/southamerica-east1/images/kube-scheduler-amd64), [arm64](https://console.cloud.google.com/artifacts/docker/k8s-artifacts-prod/southamerica-east1/images/kube-scheduler-arm64), [ppc64le](https://console.cloud.google.com/artifacts/docker/k8s-artifacts-prod/southamerica-east1/images/kube-scheduler-ppc64le), [s390x](https://console.cloud.google.com/artifa...

    /** The key of the message: General Config */
    public static final String LABELS_crawler_title_edit = "{labels.crawler_title_edit}";

    /** The key of the message: Schedule */
    public static final String LABELS_SCHEDULE = "{labels.schedule}";

    /** The key of the message: Enabled */
    public static final String LABELS_ENABLED = "{labels.enabled}";

    /** The key of the message: Delete old documents */