if (response.isFailed()) {
                if (ignoreAlreadyExists) {
                    continue;
                }
                sb.append("\n[").append(i).append("]: index [").append(response.getIndex()).append("], id [").append(response.getId())
                        .append("], message [").append(response.getFailureMessage()).append("]");
            }
        }
        if (sb.length() > 0) {

                    final BulkRequestBuilder bulkRequest = client.prepareBulk();
                    for (final SearchHit hit : hits) {
                        bulkRequest.add(client.prepareDelete().setIndex(hit.getIndex()).setId(hit.getId()));
                    }
                    return bulkRequest.execute();
                });
                if (bulkResponse.hasFailures()) {