list.stream().forEach(target -> {
            bufferedList.add(target);
            if (bufferedList.size() >= bulkBufferSize) {
                final BulkResponse response = doInsertAll(bufferedList, opType);
                if (response.hasFailures()) {
                    final String failureMessage = buildFailureMessage(response, ignoreAlreadyExists);
                    if (failureMessage.length() > 0) {