CreateIndexResponse createIndexResponse =
                client.admin().indices().prepareCreate(TEST_INDEX).setSettings(indexSettings).execute().actionGet();

        assertTrue(createIndexResponse.isAcknowledged());

        // Create suggest settings index
        Settings suggestIndexSettings = Settings.builder().put("number_of_shards", 1).put("number_of_replicas", 0).build();

        final CreateIndexResponse response =
                client.admin().indices().prepareCreate(indexName).addAlias(new Alias(aliasName)).execute().actionGet();
        assertTrue("Index creation should be acknowledged", response.isAcknowledged());

        final Suggester suggester = Suggester.builder().build(client, "test");

        // Use reflection to access private method

                    .setMapping(mappingSource)
                    .execute()
                    .actionGet(suggestSettings.getIndicesTimeout());
            if (!createIndexResponse.isAcknowledged()) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Failed to create next index (not acknowledged): index={}", indexName);
                }

                        .setSettings(loadIndexSettings(), XContentType.JSON)
                        .execute()
                        .actionGet(settings.getIndicesTimeout());
                if (!response.isAcknowledged()) {
                    throw new SuggestSettingsException("Failed to create " + actualIndex + "/" + type + " index.", e);
                }
                client.admin()
                        .cluster()

                }
                return c.admin().indices().prepareCreate(index).setSource(source, XContentType.JSON).execute();
            });
            if (indexResponse.isAcknowledged()) {
                logger.info("Created {} index.", index);
            } else if (logger.isDebugEnabled()) {
                logger.debug("Failed to create {} index.", index);
            }
        }

                    .setSource(source, XContentType.JSON)
                    .execute()
                    .actionGet(fessConfig.getIndexIndicesTimeout());
            if (indexResponse.isAcknowledged()) {
                logger.info("Created index: indexName={}", indexName);
                return true;
            }
            if (logger.isDebugEnabled()) {