}
                return null;
            });
            resultBuf.append(count).append(" docs").append("\n");
        } catch (final Exception e) {
            logger.error("Could not update labels.", e);
            resultBuf.append(e.getMessage()).append("\n");
        }

        return resultBuf.toString();
    }

    public UpdateLabelJob query(final QueryBuilder queryBuilder) {

            final InputStreamThread ist = jobProcess.getInputStreamThread();
            try {
                ist.interrupt();
            } catch (final Exception e) {
                logger.warn("Could not interrupt a thread of an input stream.", e);
            }

            final CountDownLatch latch = new CountDownLatch(3);
            final Process process = jobProcess.getProcess();
            new Thread(() -> {

            method.invoke(null, (Object[]) null);
        } catch (final ClassNotFoundException e) {
            // ignore
        } catch (final Exception e) {
            logger.warn("Could not shutdown Commons HttpClient.", e);
        }
    }

        try {
            searchEngineClient.deleteByQuery(fessConfig.getIndexDocumentUpdateIndex(), queryBuilder);

        } catch (final Exception e) {
            logger.error("Could not delete expired documents: {}", queryBuilder, e);
            resultBuf.append(e.getMessage()).append("\n");
        }

        return resultBuf.toString();
    }

        final ExtractorFactory extractorFactory = ComponentUtil.getExtractorFactory();
        if (extractorFactory == null) {
            throw new FessSystemException("Could not find extractorFactory.");
        }
        final Extractor extractor = extractorFactory.getExtractor(responseData.getMimeType());
        if (logger.isDebugEnabled()) {

            throw new FessSystemException("Could not find extractorFactory.");
        }
        Extractor extractor = extractorFactory.getExtractor(responseData.getMimeType());
        if (extractor == null) {
            extractor = ComponentUtil.getComponent("tikaExtractor");
            if (extractor == null) {
                throw new FessSystemException("Could not find tikaExtractor.");
            }
        }

                } catch (final Exception e) {
                    logger.warn("Could not close a process input stream.", e);
                }
            });
            CommonPoolUtil.execute(() -> {
                try {
                    CloseableUtil.closeQuietly(p.getErrorStream());
                } catch (final Exception e) {
                    logger.warn("Could not close a process error stream.", e);
                }

    }

    protected void deleteTempDir(final File ownTmpDir) {
        if (ownTmpDir == null) {
            return;
        }
        if (!FileUtils.deleteQuietly(ownTmpDir)) {
            logger.warn("Could not delete a temp dir: {}", ownTmpDir.getAbsolutePath());
        }
    }

    protected void appendJarFile(final String cpSeparator, final StringBuilder buf, final File libDir, final String basePath) {

                    process.destroy();
                    teminated = true;
                } catch (final Exception e) {
                    if (logger.isInfoEnabled()) {
                        logger.info("Could not kill the subprocess.", e);
                    }
                }
            }
        }

        /**
         * @param finished
         *            The finished to set.
         */