}
        bulkDelete.execute().actionGet(fessConfig.getIndexSearchTimeout());

        // Delete any remaining events beyond the search size limit (discard overflow)
        try {
            client.deleteByQuery(indexName, QueryBuilders.termQuery("hostname", hostname));
        } catch (final Exception e) {
            logger.debug("Failed to delete remaining log notifications.", e);
        }

        final String docId = form.docId;
        try {
            final QueryBuilder query = QueryBuilders.termQuery(fessConfig.getIndexFieldDocId(), docId);
            searchEngineClient.deleteByQuery(fessConfig.getIndexDocumentUpdateIndex(), query);
            saveInfo(messages -> messages.addSuccessDeleteDocFromIndex(GLOBAL));
        } catch (final Exception e) {

        runner.refresh();

        assertEquals(3, suggester.getAllWordsNum());

        SuggestWriterResult result = writer.deleteByQuery(runner.client(), suggester.settings(), suggester.getIndex(),
                QueryBuilders.matchQuery(FieldNames.TEXT, "テスト0"));

        assertNotNull(result);
        assertFalse(result.hasFailure());

    protected void deleteKeyFromArray(final String index, final String type, final String key) {
        final String actualIndex = index + "." + type.toLowerCase(Locale.ENGLISH);
        try {
            SuggestUtil.deleteByQuery(client, settings, actualIndex, QueryBuilders.termQuery(FieldNames.ARRAY_KEY, key));
        } catch (final Exception e) {
            throw new SuggestSettingsException("Failed to delete all from array.", e);
        }

                searchEngineClient.admin().indices().prepareRefresh(index).execute().actionGet();
                final long numOfDeleted = searchEngineClient.deleteByQuery(index, queryBuilder);
                logger.info("[{}] Deleted {} stale documents.", dataConfig.getName(), numOfDeleted);
            } catch (final Exception e) {

     *
     * @param index        the index name
     * @param queryBuilder the query to match documents for deletion
     * @return the number of documents deleted
     */
    public long deleteByQuery(final String index, final QueryBuilder queryBuilder) {

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        SearchResponse response = client.prepareSearch(index)