when(mockSearchBuilder.execute()).thenReturn(mockSearchFuture);
        when(mockSearchFuture.actionGet(anyLong(), any(TimeUnit.class))).thenReturn(mockSearchResponse);
        when(mockSearchResponse.getScrollId()).thenReturn("scroll1", "scroll1");
        when(mockSearchResponse.getHits()).thenReturn(mockSearchHits);
        when(mockSearchHits.getHits()).thenReturn(new SearchHit[] { mockHit }, new SearchHit[0]);

                            .actionGet(settings.getSearchTimeout());
                    if (!scrollId.equals(response.getScrollId())) {
                        SuggestUtil.deleteScrollContext(client, scrollId);
                    }
                    scrollId = response.getScrollId();
                }
            } finally {
                SuggestUtil.deleteScrollContext(client, scrollId);
            }

        SearchResponse response =
                get(c -> c.prepareSearch(index).setScroll(scrollForDelete).setSize(sizeForDelete).setQuery(queryBuilder).execute());
        String scrollId = response.getScrollId();
        int count = 0;
        try {
            while (scrollId != null) {
                final SearchHit[] hits = response.getHits().getHits();
                if (hits.length == 0) {

                if (!scrollId.equals(response.getScrollId())) {
                    getClient().clearScroll(scrollId);
                }
                scrollId = response.getScrollId();
            }
        } finally {
            getClient().clearScroll(scrollId);
        }

        refresh();
    }

                        .execute()
                        .actionGet(fessConfig.getIndexBulkTimeout());
                if (!scrollId.equals(response.getScrollId())) {
                    deleteScrollContext(scrollId);
                }
                scrollId = response.getScrollId();
            }
        } finally {
            deleteScrollContext(scrollId);
        }
        return count;
    }