org.elasticsearch.action.admin.indices.create.SplitIndexIT.java Source code

Java tutorial

Introduction

Here is the source code for org.elasticsearch.action.admin.indices.create.SplitIndexIT.java

Source

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.elasticsearch.action.admin.indices.create;

import org.apache.lucene.search.Sort;
import org.apache.lucene.search.SortField;
import org.apache.lucene.search.SortedSetSelector;
import org.apache.lucene.search.SortedSetSortField;
import org.apache.lucene.search.join.ScoreMode;
import org.elasticsearch.Version;
import org.elasticsearch.action.admin.cluster.state.ClusterStateRequest;
import org.elasticsearch.action.admin.cluster.state.ClusterStateResponse;
import org.elasticsearch.action.admin.indices.settings.get.GetSettingsResponse;
import org.elasticsearch.action.admin.indices.shrink.ResizeType;
import org.elasticsearch.action.admin.indices.stats.CommonStats;
import org.elasticsearch.action.admin.indices.stats.IndicesStatsResponse;
import org.elasticsearch.action.admin.indices.stats.ShardStats;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaDataCreateIndexService;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.routing.Murmur3HashFunction;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.cluster.routing.allocation.decider.EnableAllocationDecider;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.IndexService;
import org.elasticsearch.index.engine.SegmentsStats;
import org.elasticsearch.index.query.TermsQueryBuilder;
import org.elasticsearch.index.seqno.SeqNoStats;
import org.elasticsearch.index.shard.IndexShard;
import org.elasticsearch.indices.IndicesService;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.test.ESIntegTestCase;
import org.elasticsearch.test.InternalSettingsPlugin;
import org.elasticsearch.test.VersionUtils;

import java.io.IOException;
import java.io.UncheckedIOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.function.BiFunction;
import java.util.stream.IntStream;

import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
import static org.elasticsearch.index.query.QueryBuilders.nestedQuery;
import static org.elasticsearch.index.query.QueryBuilders.termQuery;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertHitCount;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertNoFailures;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.greaterThanOrEqualTo;

public class SplitIndexIT extends ESIntegTestCase {

    @Override
    protected Collection<Class<? extends Plugin>> nodePlugins() {
        return Arrays.asList(InternalSettingsPlugin.class);
    }

    public void testCreateSplitIndexToN() throws IOException {
        int[][] possibleShardSplits = new int[][] { { 2, 4, 8 }, { 3, 6, 12 }, { 1, 2, 4 } };
        int[] shardSplits = randomFrom(possibleShardSplits);
        splitToN(shardSplits[0], shardSplits[1], shardSplits[2]);
    }

    public void testSplitFromOneToN() {
        splitToN(1, 5, 10);
        client().admin().indices().prepareDelete("*").get();
        int randomSplit = randomIntBetween(2, 6);
        splitToN(1, randomSplit, randomSplit * 2);
    }

    private void splitToN(int sourceShards, int firstSplitShards, int secondSplitShards) {

        assertEquals(sourceShards, (sourceShards * firstSplitShards) / firstSplitShards);
        assertEquals(firstSplitShards, (firstSplitShards * secondSplitShards) / secondSplitShards);
        internalCluster().ensureAtLeastNumDataNodes(2);
        final boolean useRouting = randomBoolean();
        final boolean useNested = randomBoolean();
        final boolean useMixedRouting = useRouting ? randomBoolean() : false;
        CreateIndexRequestBuilder createInitialIndex = prepareCreate("source");
        Settings.Builder settings = Settings.builder().put(indexSettings()).put("number_of_shards", sourceShards);
        final boolean useRoutingPartition;
        if (randomBoolean()) {
            // randomly set the value manually
            int routingShards = secondSplitShards * randomIntBetween(1, 10);
            settings.put("index.number_of_routing_shards", routingShards);
            useRoutingPartition = false;
        } else {
            useRoutingPartition = randomBoolean();
        }
        if (useRouting && useMixedRouting == false && useRoutingPartition) {
            int numRoutingShards = MetaDataCreateIndexService.calculateNumRoutingShards(secondSplitShards,
                    Version.CURRENT) - 1;
            settings.put("index.routing_partition_size", randomIntBetween(1, numRoutingShards));
            if (useNested) {
                createInitialIndex.addMapping("t1", "_routing", "required=true", "nested1", "type=nested");
            } else {
                createInitialIndex.addMapping("t1", "_routing", "required=true");
            }
        } else if (useNested) {
            createInitialIndex.addMapping("t1", "nested1", "type=nested");
        }
        logger.info("use routing {} use mixed routing {} use nested {}", useRouting, useMixedRouting, useNested);
        createInitialIndex.setSettings(settings).get();

        int numDocs = randomIntBetween(10, 50);
        String[] routingValue = new String[numDocs];

        BiFunction<String, Integer, IndexRequestBuilder> indexFunc = (index, id) -> {
            try {
                return client().prepareIndex(index, "t1", Integer.toString(id))
                        .setSource(jsonBuilder().startObject().field("foo", "bar").field("i", id)
                                .startArray("nested1").startObject().field("n_field1", "n_value1_1")
                                .field("n_field2", "n_value2_1").endObject().startObject()
                                .field("n_field1", "n_value1_2").field("n_field2", "n_value2_2").endObject()
                                .endArray().endObject());
            } catch (IOException e) {
                throw new UncheckedIOException(e);
            }
        };
        for (int i = 0; i < numDocs; i++) {
            IndexRequestBuilder builder = indexFunc.apply("source", i);
            if (useRouting) {
                String routing = randomRealisticUnicodeOfCodepointLengthBetween(1, 10);
                if (useMixedRouting && randomBoolean()) {
                    routingValue[i] = null;
                } else {
                    routingValue[i] = routing;
                }
                builder.setRouting(routingValue[i]);
            }
            builder.get();
        }

        if (randomBoolean()) {
            for (int i = 0; i < numDocs; i++) { // let's introduce some updates / deletes on the index
                if (randomBoolean()) {
                    IndexRequestBuilder builder = indexFunc.apply("source", i);
                    if (useRouting) {
                        builder.setRouting(routingValue[i]);
                    }
                    builder.get();
                }
            }
        }

        ImmutableOpenMap<String, DiscoveryNode> dataNodes = client().admin().cluster().prepareState().get()
                .getState().nodes().getDataNodes();
        assertTrue("at least 2 nodes but was: " + dataNodes.size(), dataNodes.size() >= 2);
        ensureYellow();
        client().admin().indices().prepareUpdateSettings("source")
                .setSettings(Settings.builder().put("index.blocks.write", true)).get();
        ensureGreen();
        Settings.Builder firstSplitSettingsBuilder = Settings.builder().put("index.number_of_replicas", 0)
                .put("index.number_of_shards", firstSplitShards);
        if (sourceShards == 1 && useRoutingPartition == false && randomBoolean()) { // try to set it if we have a source index with 1 shard
            firstSplitSettingsBuilder.put("index.number_of_routing_shards", secondSplitShards);
        }
        assertAcked(client().admin().indices().prepareResizeIndex("source", "first_split")
                .setResizeType(ResizeType.SPLIT).setSettings(firstSplitSettingsBuilder.build()).get());
        ensureGreen();
        assertHitCount(client().prepareSearch("first_split").setSize(100)
                .setQuery(new TermsQueryBuilder("foo", "bar")).get(), numDocs);

        for (int i = 0; i < numDocs; i++) { // now update
            IndexRequestBuilder builder = indexFunc.apply("first_split", i);
            if (useRouting) {
                builder.setRouting(routingValue[i]);
            }
            builder.get();
        }
        flushAndRefresh();
        assertHitCount(client().prepareSearch("first_split").setSize(100)
                .setQuery(new TermsQueryBuilder("foo", "bar")).get(), numDocs);
        assertHitCount(
                client().prepareSearch("source").setSize(100).setQuery(new TermsQueryBuilder("foo", "bar")).get(),
                numDocs);
        for (int i = 0; i < numDocs; i++) {
            GetResponse getResponse = client().prepareGet("first_split", "t1", Integer.toString(i))
                    .setRouting(routingValue[i]).get();
            assertTrue(getResponse.isExists());
        }

        client().admin().indices().prepareUpdateSettings("first_split")
                .setSettings(Settings.builder().put("index.blocks.write", true)).get();
        ensureGreen();
        // now split source into a new index
        assertAcked(client().admin().indices().prepareResizeIndex("first_split", "second_split")
                .setResizeType(ResizeType.SPLIT).setSettings(Settings.builder().put("index.number_of_replicas", 0)
                        .put("index.number_of_shards", secondSplitShards).build())
                .get());
        ensureGreen();
        assertHitCount(client().prepareSearch("second_split").setSize(100)
                .setQuery(new TermsQueryBuilder("foo", "bar")).get(), numDocs);
        // let it be allocated anywhere and bump replicas
        client().admin().indices().prepareUpdateSettings("second_split")
                .setSettings(Settings.builder().put("index.number_of_replicas", 1)).get();
        ensureGreen();
        assertHitCount(client().prepareSearch("second_split").setSize(100)
                .setQuery(new TermsQueryBuilder("foo", "bar")).get(), numDocs);

        for (int i = 0; i < numDocs; i++) { // now update
            IndexRequestBuilder builder = indexFunc.apply("second_split", i);
            if (useRouting) {
                builder.setRouting(routingValue[i]);
            }
            builder.get();
        }
        flushAndRefresh();
        for (int i = 0; i < numDocs; i++) {
            GetResponse getResponse = client().prepareGet("second_split", "t1", Integer.toString(i))
                    .setRouting(routingValue[i]).get();
            assertTrue(getResponse.isExists());
        }
        assertHitCount(client().prepareSearch("second_split").setSize(100)
                .setQuery(new TermsQueryBuilder("foo", "bar")).get(), numDocs);
        assertHitCount(client().prepareSearch("first_split").setSize(100)
                .setQuery(new TermsQueryBuilder("foo", "bar")).get(), numDocs);
        assertHitCount(
                client().prepareSearch("source").setSize(100).setQuery(new TermsQueryBuilder("foo", "bar")).get(),
                numDocs);
        if (useNested) {
            assertNested("source", numDocs);
            assertNested("first_split", numDocs);
            assertNested("second_split", numDocs);
        }
        assertAllUniqueDocs(client().prepareSearch("second_split").setSize(100)
                .setQuery(new TermsQueryBuilder("foo", "bar")).get(), numDocs);
        assertAllUniqueDocs(client().prepareSearch("first_split").setSize(100)
                .setQuery(new TermsQueryBuilder("foo", "bar")).get(), numDocs);
        assertAllUniqueDocs(
                client().prepareSearch("source").setSize(100).setQuery(new TermsQueryBuilder("foo", "bar")).get(),
                numDocs);
    }

    public void assertNested(String index, int numDocs) {
        // now, do a nested query
        SearchResponse searchResponse = client().prepareSearch(index)
                .setQuery(nestedQuery("nested1", termQuery("nested1.n_field1", "n_value1_1"), ScoreMode.Avg)).get();
        assertNoFailures(searchResponse);
        assertThat(searchResponse.getHits().getTotalHits(), equalTo((long) numDocs));
    }

    public void assertAllUniqueDocs(SearchResponse response, int numDocs) {
        Set<String> ids = new HashSet<>();
        for (int i = 0; i < response.getHits().getHits().length; i++) {
            String id = response.getHits().getHits()[i].getId();
            assertTrue("found ID " + id + " more than once", ids.add(id));
        }
        assertEquals(numDocs, ids.size());
    }

    public void testSplitIndexPrimaryTerm() throws Exception {
        final List<Integer> factors = Arrays.asList(1, 2, 4, 8);
        final List<Integer> numberOfShardsFactors = randomSubsetOf(scaledRandomIntBetween(1, factors.size()),
                factors);
        final int numberOfShards = randomSubsetOf(numberOfShardsFactors).stream().reduce(1, (x, y) -> x * y);
        final int numberOfTargetShards = numberOfShardsFactors.stream().reduce(2, (x, y) -> x * y);
        internalCluster().ensureAtLeastNumDataNodes(2);
        prepareCreate("source")
                .setSettings(Settings.builder().put(indexSettings()).put("number_of_shards", numberOfShards)
                        .put("index.number_of_routing_shards", numberOfTargetShards))
                .get();

        final ImmutableOpenMap<String, DiscoveryNode> dataNodes = client().admin().cluster().prepareState().get()
                .getState().nodes().getDataNodes();
        assertThat(dataNodes.size(), greaterThanOrEqualTo(2));
        ensureYellow();

        // fail random primary shards to force primary terms to increase
        final Index source = resolveIndex("source");
        final int iterations = scaledRandomIntBetween(0, 16);
        for (int i = 0; i < iterations; i++) {
            final String node = randomSubsetOf(1, internalCluster().nodesInclude("source")).get(0);
            final IndicesService indexServices = internalCluster().getInstance(IndicesService.class, node);
            final IndexService indexShards = indexServices.indexServiceSafe(source);
            for (final Integer shardId : indexShards.shardIds()) {
                final IndexShard shard = indexShards.getShard(shardId);
                if (shard.routingEntry().primary() && randomBoolean()) {
                    disableAllocation("source");
                    shard.failShard("test", new Exception("test"));
                    // this can not succeed until the shard is failed and a replica is promoted
                    int id = 0;
                    while (true) {
                        // find an ID that routes to the right shard, we will only index to the shard that saw a primary failure
                        final String s = Integer.toString(id);
                        final int hash = Math.floorMod(Murmur3HashFunction.hash(s), numberOfShards);
                        if (hash == shardId) {
                            final IndexRequest request = new IndexRequest("source", "type", s)
                                    .source("{ \"f\": \"" + s + "\"}", XContentType.JSON);
                            client().index(request).get();
                            break;
                        } else {
                            id++;
                        }
                    }
                    enableAllocation("source");
                    ensureGreen();
                }
            }
        }

        final Settings.Builder prepareSplitSettings = Settings.builder().put("index.blocks.write", true);
        client().admin().indices().prepareUpdateSettings("source").setSettings(prepareSplitSettings).get();
        ensureYellow();

        final IndexMetaData indexMetaData = indexMetaData(client(), "source");
        final long beforeSplitPrimaryTerm = IntStream.range(0, numberOfShards).mapToLong(indexMetaData::primaryTerm)
                .max().getAsLong();

        // now split source into target
        final Settings splitSettings = Settings.builder().put("index.number_of_replicas", 0)
                .put("index.number_of_shards", numberOfTargetShards).build();
        assertAcked(client().admin().indices().prepareResizeIndex("source", "target")
                .setResizeType(ResizeType.SPLIT).setSettings(splitSettings).get());

        ensureGreen();

        final IndexMetaData aftersplitIndexMetaData = indexMetaData(client(), "target");
        for (int shardId = 0; shardId < numberOfTargetShards; shardId++) {
            assertThat(aftersplitIndexMetaData.primaryTerm(shardId), equalTo(beforeSplitPrimaryTerm + 1));
        }
    }

    private static IndexMetaData indexMetaData(final Client client, final String index) {
        final ClusterStateResponse clusterStateResponse = client.admin().cluster().state(new ClusterStateRequest())
                .actionGet();
        return clusterStateResponse.getState().metaData().index(index);
    }

    public void testCreateSplitIndex() {
        internalCluster().ensureAtLeastNumDataNodes(2);
        Version version = VersionUtils.randomVersionBetween(random(), Version.V_6_0_0_rc2, Version.CURRENT);
        prepareCreate("source").setSettings(Settings.builder().put(indexSettings()).put("number_of_shards", 1)
                .put("index.version.created", version)).get();
        final int docs = randomIntBetween(0, 128);
        for (int i = 0; i < docs; i++) {
            client().prepareIndex("source", "type")
                    .setSource("{\"foo\" : \"bar\", \"i\" : " + i + "}", XContentType.JSON).get();
        }
        ImmutableOpenMap<String, DiscoveryNode> dataNodes = client().admin().cluster().prepareState().get()
                .getState().nodes().getDataNodes();
        assertTrue("at least 2 nodes but was: " + dataNodes.size(), dataNodes.size() >= 2);
        // ensure all shards are allocated otherwise the ensure green below might not succeed since we require the merge node
        // if we change the setting too quickly we will end up with one replica unassigned which can't be assigned anymore due
        // to the require._name below.
        ensureGreen();
        // relocate all shards to one node such that we can merge it.
        client().admin().indices().prepareUpdateSettings("source")
                .setSettings(Settings.builder().put("index.blocks.write", true)).get();
        ensureGreen();

        final IndicesStatsResponse sourceStats = client().admin().indices().prepareStats("source").setSegments(true)
                .get();

        // disable rebalancing to be able to capture the right stats. balancing can move the target primary
        // making it hard to pin point the source shards.
        client().admin().cluster().prepareUpdateSettings()
                .setTransientSettings(Settings.builder()
                        .put(EnableAllocationDecider.CLUSTER_ROUTING_REBALANCE_ENABLE_SETTING.getKey(), "none"))
                .get();
        try {

            final boolean createWithReplicas = randomBoolean();
            assertAcked(client().admin().indices().prepareResizeIndex("source", "target")
                    .setResizeType(ResizeType.SPLIT)
                    .setSettings(Settings.builder().put("index.number_of_replicas", createWithReplicas ? 1 : 0)
                            .put("index.number_of_shards", 2).build())
                    .get());
            ensureGreen();

            final ClusterState state = client().admin().cluster().prepareState().get().getState();
            DiscoveryNode mergeNode = state.nodes()
                    .get(state.getRoutingTable().index("target").shard(0).primaryShard().currentNodeId());
            logger.info("split node {}", mergeNode);

            final long maxSeqNo = Arrays.stream(sourceStats.getShards())
                    .filter(shard -> shard.getShardRouting().currentNodeId().equals(mergeNode.getId()))
                    .map(ShardStats::getSeqNoStats).mapToLong(SeqNoStats::getMaxSeqNo).max().getAsLong();
            final long maxUnsafeAutoIdTimestamp = Arrays.stream(sourceStats.getShards())
                    .filter(shard -> shard.getShardRouting().currentNodeId().equals(mergeNode.getId()))
                    .map(ShardStats::getStats).map(CommonStats::getSegments)
                    .mapToLong(SegmentsStats::getMaxUnsafeAutoIdTimestamp).max().getAsLong();

            final IndicesStatsResponse targetStats = client().admin().indices().prepareStats("target").get();
            for (final ShardStats shardStats : targetStats.getShards()) {
                final SeqNoStats seqNoStats = shardStats.getSeqNoStats();
                final ShardRouting shardRouting = shardStats.getShardRouting();
                assertThat("failed on " + shardRouting, seqNoStats.getMaxSeqNo(), equalTo(maxSeqNo));
                assertThat("failed on " + shardRouting, seqNoStats.getLocalCheckpoint(), equalTo(maxSeqNo));
                assertThat("failed on " + shardRouting,
                        shardStats.getStats().getSegments().getMaxUnsafeAutoIdTimestamp(),
                        equalTo(maxUnsafeAutoIdTimestamp));
            }

            final int size = docs > 0 ? 2 * docs : 1;
            assertHitCount(client().prepareSearch("target").setSize(size)
                    .setQuery(new TermsQueryBuilder("foo", "bar")).get(), docs);

            if (createWithReplicas == false) {
                // bump replicas
                client().admin().indices().prepareUpdateSettings("target")
                        .setSettings(Settings.builder().put("index.number_of_replicas", 1)).get();
                ensureGreen();
                assertHitCount(client().prepareSearch("target").setSize(size)
                        .setQuery(new TermsQueryBuilder("foo", "bar")).get(), docs);
            }

            for (int i = docs; i < 2 * docs; i++) {
                client().prepareIndex("target", "type")
                        .setSource("{\"foo\" : \"bar\", \"i\" : " + i + "}", XContentType.JSON).get();
            }
            flushAndRefresh();
            assertHitCount(client().prepareSearch("target").setSize(2 * size)
                    .setQuery(new TermsQueryBuilder("foo", "bar")).get(), 2 * docs);
            assertHitCount(client().prepareSearch("source").setSize(size)
                    .setQuery(new TermsQueryBuilder("foo", "bar")).get(), docs);
            GetSettingsResponse target = client().admin().indices().prepareGetSettings("target").get();
            assertEquals(version,
                    target.getIndexToSettings().get("target").getAsVersion("index.version.created", null));
        } finally {
            // clean up
            client().admin().cluster().prepareUpdateSettings().setTransientSettings(Settings.builder()
                    .put(EnableAllocationDecider.CLUSTER_ROUTING_REBALANCE_ENABLE_SETTING.getKey(), (String) null))
                    .get();
        }

    }

    public void testCreateSplitWithIndexSort() throws Exception {
        SortField expectedSortField = new SortedSetSortField("id", true, SortedSetSelector.Type.MAX);
        expectedSortField.setMissingValue(SortedSetSortField.STRING_FIRST);
        Sort expectedIndexSort = new Sort(expectedSortField);
        internalCluster().ensureAtLeastNumDataNodes(2);
        prepareCreate("source")
                .setSettings(Settings.builder().put(indexSettings()).put("sort.field", "id")
                        .put("sort.order", "desc").put("number_of_shards", 2).put("number_of_replicas", 0))
                .addMapping("type", "id", "type=keyword,doc_values=true").get();
        for (int i = 0; i < 20; i++) {
            client().prepareIndex("source", "type", Integer.toString(i))
                    .setSource("{\"foo\" : \"bar\", \"id\" : " + i + "}", XContentType.JSON).get();
        }
        ImmutableOpenMap<String, DiscoveryNode> dataNodes = client().admin().cluster().prepareState().get()
                .getState().nodes().getDataNodes();
        assertTrue("at least 2 nodes but was: " + dataNodes.size(), dataNodes.size() >= 2);
        DiscoveryNode[] discoveryNodes = dataNodes.values().toArray(DiscoveryNode.class);
        String mergeNode = discoveryNodes[0].getName();
        // ensure all shards are allocated otherwise the ensure green below might not succeed since we require the merge node
        // if we change the setting too quickly we will end up with one replica unassigned which can't be assigned anymore due
        // to the require._name below.
        ensureGreen();

        flushAndRefresh();
        assertSortedSegments("source", expectedIndexSort);

        client().admin().indices().prepareUpdateSettings("source")
                .setSettings(Settings.builder().put("index.blocks.write", true)).get();
        ensureYellow();

        // check that index sort cannot be set on the target index
        IllegalArgumentException exc = expectThrows(IllegalArgumentException.class,
                () -> client().admin().indices().prepareResizeIndex("source", "target")
                        .setResizeType(ResizeType.SPLIT)
                        .setSettings(Settings.builder().put("index.number_of_replicas", 0)
                                .put("index.number_of_shards", 4).put("index.sort.field", "foo").build())
                        .get());
        assertThat(exc.getMessage(), containsString("can't override index sort when resizing an index"));

        // check that the index sort order of `source` is correctly applied to the `target`
        assertAcked(client().admin().indices().prepareResizeIndex("source", "target")
                .setResizeType(ResizeType.SPLIT).setSettings(Settings.builder().put("index.number_of_replicas", 0)
                        .put("index.number_of_shards", 4).build())
                .get());
        ensureGreen();
        flushAndRefresh();
        GetSettingsResponse settingsResponse = client().admin().indices().prepareGetSettings("target").execute()
                .actionGet();
        assertEquals(settingsResponse.getSetting("target", "index.sort.field"), "id");
        assertEquals(settingsResponse.getSetting("target", "index.sort.order"), "desc");
        assertSortedSegments("target", expectedIndexSort);

        // ... and that the index sort is also applied to updates
        for (int i = 20; i < 40; i++) {
            client().prepareIndex("target", "type")
                    .setSource("{\"foo\" : \"bar\", \"i\" : " + i + "}", XContentType.JSON).get();
        }
        flushAndRefresh();
        assertSortedSegments("target", expectedIndexSort);
    }
}