while (!isInterrupted() && !stopIfLeisure()) {
                for (final TimeoutTask task : getExpiredTask()) {
                    processTask(executorService, task);
                }
                Thread.sleep(1000L);
            }
        } catch (final InterruptedException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Interrupted.", e);
            }
        } finally {

        setValueToObject(ComponentUtil.getLabelTypeHelper(), "labelTypePatternList", new ArrayList<LabelTypePattern>());

        System.gc();
        Thread.sleep(1000L);
        long current = MemoryUtil.getUsedMemory();
        for (int i = 0; i < 10000; i++) {
            if (i % 1000 == 0) {
                logger.info("count:" + i + ", " + MemoryUtil.getMemoryUsageLog());

            public void run () {

                try {
                    synchronized ( lock ) {
                        lock.wait(1000);
                    }

                    Thread.sleep(100);
                    t.interrupt();
                }
                catch ( InterruptedException e ) {
                    e.printStackTrace();
                }
            }
        });

            reader.addSort(SortBuilders.scoreSort());
            return reader;
        }, docPerReq, () -> {
            systemHelper.calibrateCpuLoad();
            ThreadUtil.sleep(interval);
        }).then(response -> {
            refresh();
            success.accept(true);
        }).error(t -> error.accept(t));
    }

    public void purgeDocumentSuggest(final LocalDateTime time) {