}
                        return StringUtil.EMPTY;
                    });
            final BulkResponse response = builder.execute().actionGet(fessConfig.getIndexBulkTimeout());
            if (response.hasFailures()) {
                if (createOnly) {
                    final long realFailures = Arrays.stream(response.getItems())

     * The value is, e.g. 3m <br>
     * comment: Timeout for bulk index operations.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexBulkTimeout();

    /**
     * Get the value for the key 'index.delete.timeout'. <br>
     * The value is, e.g. 3m <br>
     * comment: Timeout for delete operations in the index.