.setRetryOnConflict(5).execute().actionGet(getIndexTimeout());
            client.admin().indices().prepareRefresh().setIndices(settingsIndexName).execute().actionGet(getIndicesTimeout());
        } catch (final Exception e) {
            throw new SuggestSettingsException("Failed to update suggestSettings.", e);
        }
    }

            client.prepareUpdate().setIndex(actualIndex).setId(id).setDocAsUpsert(true).setDoc(builder).execute()
                    .actionGet(settings.getIndexTimeout());
            client.admin().indices().prepareRefresh().setIndices(actualIndex).execute().actionGet(settings.getIndicesTimeout());
        } catch (final Exception e) {
            throw new SuggestSettingsException("Failed to add to array.", e);
        }
    }

                final SearchEngineClient searchEngineClient = ComponentUtil.getSearchEngineClient();
                final String index = fessConfig.getIndexDocumentUpdateIndex();
                searchEngineClient.admin().indices().prepareRefresh(index).execute().actionGet();
                final long numOfDeleted = searchEngineClient.deleteByQuery(index, queryBuilder);
                logger.info("Deleted {} old docs.", numOfDeleted);

        return new PopularWordsRequestBuilder(client).setIndex(getSearchAlias(index));
    }

    public RefreshResponse refresh() {
        return client.admin().indices().prepareRefresh().execute().actionGet(suggestSettings.getIndexTimeout());
    }

    public void shutdown() {
        threadPool.shutdownNow();
    }

    public boolean createIndexIfNothing() {
        try {

                        numberOfSuggestDocs += res.getNumberOfSuggestDocs();
                        numberOfInputDocs += res.getNumberOfInputDocs();
                        client.admin().indices().prepareRefresh(index).execute().actionGet(settings.getIndicesTimeout());
                        docs.clear();

                        waitController.run();
                    }
                }

                    scrollId = response.getScrollId();
                }
            } finally {
                SuggestUtil.deleteScrollContext(client, scrollId);
            }
            client.admin().indices().prepareRefresh(index).execute().actionGet(settings.getIndicesTimeout());
        } catch (final Exception e) {
            throw new SuggesterException("Failed to exec delete by query.", e);
        }

        return true;

        return numOfDeleted;
    }

    protected int refreshIndex(final SearchEngineClient searchEngineClient, final String index) {
        final RefreshResponse response = searchEngineClient.admin().indices().prepareRefresh(index).execute().actionGet();
        if (logger.isDebugEnabled()) {
            logger.debug("[{}] refresh status: {} ({}/{}/{})", index, response.getStatus(), response.getTotalShards(),

    //                                                                              ======
    public RefreshResponse refresh() {
        return client.admin().indices().prepareRefresh(asEsIndex()).execute().actionGet(refreshTimeout);
    }

    // ===================================================================================

    //                                                                              ======
    public RefreshResponse refresh() {
        return client.admin().indices().prepareRefresh(asEsIndex()).execute().actionGet(refreshTimeout);
    }

    // ===================================================================================

    //                                                                              ======
    public RefreshResponse refresh() {
        return client.admin().indices().prepareRefresh(asEsIndex()).execute().actionGet(refreshTimeout);
    }

    // ===================================================================================