Shows issues 3832

TestExampleIssue3832.java

import com.google.common.util.concurrent.Futures;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.search.SearchType;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;

import java.util.concurrent.TimeUnit;

import static org.junit.Assert.assertEquals;

/**
 * This main class shows an issue I have found while scrolling through results. If one tries to delete a document then
 * it actually deletes everything.
 * <br/>
 * See <a href="https://github.com/elasticsearch/elasticsearch/issues/3832">issue elasticsearch#3382</a>
 *
 * @author amir.raminfar
 */
public class TestExampleIssue3832 {
    private static int TOTAL = 100_000;
    private static String INDEX = "test";
    private static String TYPE = "document";
    private static TimeValue FIVE_MINS = new TimeValue(5, TimeUnit.MINUTES);

    private static void createSomeObjects(Client client) {
        for (int i = 0; i < TOTAL; i++) {
            Futures.getUnchecked(client.prepareIndex(INDEX, TYPE).setSource("data", "foo_" + i).execute());
        }

        // Force a refresh
        client.admin().indices().prepareRefresh().execute().actionGet();
    }

    public static void main(String... args) {
        // Setup client using transport client. In production I use node but this issue occurred with transport client. 
        Settings settings = ImmutableSettings.settingsBuilder().put("cluster.name", "elasticsearch_amirraminfar").build();
        Client client = new TransportClient(settings).addTransportAddress(new InetSocketTransportAddress("localhost", 9300));

        // Drop existing index
        Futures.getUnchecked(client.admin().indices().prepareDelete(INDEX).execute());

        // Let's create some test objects
        createSomeObjects(client);

        assertEquals(TOTAL, client.prepareCount(INDEX).get().getCount());

        SearchResponse searchResponse = client.prepareSearch()
                                              .setSize(2000)
                                              .setSearchType(SearchType.SCAN)
                                              .setScroll(FIVE_MINS)
                                              .execute()
                                              .actionGet();

        int found = 0;
        int deleted = 0;
        while (true) {
            searchResponse = client.prepareSearchScroll(searchResponse.getScrollId())
                                   .setScroll(FIVE_MINS)
                                   .execute()
                                   .actionGet();

            for (SearchHit hit : searchResponse.getHits()) {
                if (found % 100 == 0) { // Let's simulate a random deletion
                    Futures.getUnchecked(client.prepareDeleteByQuery()
                                               .setQuery(QueryBuilders.fieldQuery("_id", hit.id())).execute());

//                    todo Using term query works every time
//                    Futures.getUnchecked(client.prepareDeleteByQuery()
//                                               .setQuery(QueryBuilders.termQuery("_id", hit.id())).execute());
                    deleted++;
                }

                found++;
            }

            if (searchResponse.getHits().getHits().length == 0) {
                break;
            }
        }

        // Force refresh before looking for counts
        client.admin().indices().prepareRefresh().execute().actionGet();

        assertEquals(TOTAL, found);

        // This will fail java.lang.AssertionError: expected:<99000> but was:<0>
        assertEquals(TOTAL - deleted, client.prepareCount(INDEX).get().getCount()); 
    }
}

Installed elasticsearch with brew install elasticsearch