} catch (final InterruptedException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Interrupted.", e);
            }
        } finally {
            executorService.shutdownNow();
        }
        return totalCount;
    }

                if (logger.isDebugEnabled()) {
                    logger.debug("Interrupted.", e);
                }
            } finally {
                executorService.shutdownNow();
            }
        }
    }

    public List<Map<String, Object>> search(final String query, final SearchRequestParams params,
            final OptionalThing<FessUserBean> userBean) {

        } catch (final InterruptedException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Failed to interrupt executor.", e);
            }
        } finally {
            executor.shutdownNow();
        }

        if (!deleteUrlList.isEmpty()) {
            deleteDocuments();
        }
        indexUpdateCallback.commit();
    }

    protected void deleteDocuments() {