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SegmentReplicationIT.java
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/*
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
package org.opensearch.indices.replication;
import com.carrotsearch.randomizedtesting.RandomizedTest;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.SortedDocValuesField;
import org.apache.lucene.document.StringField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.Fields;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.SegmentInfos;
import org.apache.lucene.index.StandardDirectoryReader;
import org.apache.lucene.tests.util.TestUtil;
import org.apache.lucene.util.BytesRef;
import org.opensearch.action.admin.cluster.stats.ClusterStatsResponse;
import org.opensearch.action.admin.indices.alias.Alias;
import org.opensearch.action.admin.indices.flush.FlushRequest;
import org.opensearch.action.admin.indices.stats.IndicesStatsRequest;
import org.opensearch.action.admin.indices.stats.IndicesStatsResponse;
import org.opensearch.action.get.GetResponse;
import org.opensearch.action.get.MultiGetRequest;
import org.opensearch.action.get.MultiGetResponse;
import org.opensearch.action.index.IndexResponse;
import org.opensearch.action.search.CreatePitAction;
import org.opensearch.action.search.CreatePitRequest;
import org.opensearch.action.search.CreatePitResponse;
import org.opensearch.action.search.DeletePitAction;
import org.opensearch.action.search.DeletePitRequest;
import org.opensearch.action.search.PitTestsUtil;
import org.opensearch.action.search.SearchResponse;
import org.opensearch.action.search.SearchType;
import org.opensearch.action.support.WriteRequest;
import org.opensearch.action.termvectors.TermVectorsRequestBuilder;
import org.opensearch.action.termvectors.TermVectorsResponse;
import org.opensearch.action.update.UpdateResponse;
import org.opensearch.client.Requests;
import org.opensearch.cluster.ClusterState;
import org.opensearch.cluster.health.ClusterHealthStatus;
import org.opensearch.cluster.metadata.IndexMetadata;
import org.opensearch.cluster.node.DiscoveryNode;
import org.opensearch.cluster.routing.Preference;
import org.opensearch.cluster.routing.ShardRouting;
import org.opensearch.cluster.routing.ShardRoutingState;
import org.opensearch.cluster.routing.allocation.command.CancelAllocationCommand;
import org.opensearch.common.action.ActionFuture;
import org.opensearch.common.collect.Tuple;
import org.opensearch.common.concurrent.GatedCloseable;
import org.opensearch.common.lease.Releasable;
import org.opensearch.common.lucene.index.OpenSearchDirectoryReader;
import org.opensearch.common.settings.Settings;
import org.opensearch.common.unit.TimeValue;
import org.opensearch.core.common.io.stream.NamedWriteableRegistry;
import org.opensearch.core.index.shard.ShardId;
import org.opensearch.core.xcontent.XContentBuilder;
import org.opensearch.index.IndexModule;
import org.opensearch.index.ReplicationStats;
import org.opensearch.index.SegmentReplicationPerGroupStats;
import org.opensearch.index.SegmentReplicationPressureService;
import org.opensearch.index.SegmentReplicationShardStats;
import org.opensearch.index.codec.CodecService;
import org.opensearch.index.engine.Engine;
import org.opensearch.index.engine.EngineConfig;
import org.opensearch.index.engine.NRTReplicationReaderManager;
import org.opensearch.index.shard.IndexShard;
import org.opensearch.indices.recovery.FileChunkRequest;
import org.opensearch.indices.replication.checkpoint.ReplicationCheckpoint;
import org.opensearch.indices.replication.common.ReplicationType;
import org.opensearch.node.NodeClosedException;
import org.opensearch.search.SearchService;
import org.opensearch.search.builder.PointInTimeBuilder;
import org.opensearch.search.internal.PitReaderContext;
import org.opensearch.search.sort.SortOrder;
import org.opensearch.test.BackgroundIndexer;
import org.opensearch.test.InternalTestCluster;
import org.opensearch.test.OpenSearchIntegTestCase;
import org.opensearch.test.transport.MockTransportService;
import org.opensearch.transport.TransportService;
import org.junit.Before;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import java.util.stream.Collectors;
import static java.util.Arrays.asList;
import static org.opensearch.action.search.PitTestsUtil.assertSegments;
import static org.opensearch.action.search.SearchContextId.decode;
import static org.opensearch.common.xcontent.XContentFactory.jsonBuilder;
import static org.opensearch.index.query.QueryBuilders.boolQuery;
import static org.opensearch.index.query.QueryBuilders.matchAllQuery;
import static org.opensearch.index.query.QueryBuilders.matchQuery;
import static org.opensearch.index.query.QueryBuilders.rangeQuery;
import static org.opensearch.index.query.QueryBuilders.termQuery;
import static org.opensearch.indices.replication.SegmentReplicationTarget.REPLICATION_PREFIX;
import static org.opensearch.test.hamcrest.OpenSearchAssertions.assertAcked;
import static org.opensearch.test.hamcrest.OpenSearchAssertions.assertAllSuccessful;
import static org.opensearch.test.hamcrest.OpenSearchAssertions.assertHitCount;
import static org.opensearch.test.hamcrest.OpenSearchAssertions.assertNoFailures;
import static org.opensearch.test.hamcrest.OpenSearchAssertions.assertSearchHits;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.is;
@OpenSearchIntegTestCase.ClusterScope(scope = OpenSearchIntegTestCase.Scope.TEST, numDataNodes = 0)
public class SegmentReplicationIT extends SegmentReplicationBaseIT {
@Before
private void setup() {
internalCluster().startClusterManagerOnlyNode();
}
private static String indexOrAlias() {
return randomBoolean() ? INDEX_NAME : "alias";
}
public void testPrimaryStopped_ReplicaPromoted() throws Exception {
final String primary = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME);
ensureYellowAndNoInitializingShards(INDEX_NAME);
final String replica = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
client().prepareIndex(INDEX_NAME).setId("1").setSource("foo", "bar").setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE).get();
refresh(INDEX_NAME);
waitForSearchableDocs(1, primary, replica);
// index another doc but don't refresh, we will ensure this is searchable once replica is promoted.
client().prepareIndex(INDEX_NAME).setId("2").setSource("bar", "baz").setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE).get();
// stop the primary node - we only have one shard on here.
internalCluster().stopRandomNode(InternalTestCluster.nameFilter(primary));
ensureYellowAndNoInitializingShards(INDEX_NAME);
final ShardRouting replicaShardRouting = getShardRoutingForNodeName(replica);
assertNotNull(replicaShardRouting);
assertTrue(replicaShardRouting + " should be promoted as a primary", replicaShardRouting.primary());
final SearchResponse response = client(replica).prepareSearch(INDEX_NAME).setSize(0).setPreference("_only_local").get();
// new primary should have at least the doc count from the first set of segments.
assertTrue(response.getHits().getTotalHits().value >= 1);
// assert we can index into the new primary.
client().prepareIndex(INDEX_NAME).setId("3").setSource("bar", "baz").setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE).get();
assertHitCount(client(replica).prepareSearch(INDEX_NAME).setSize(0).setPreference("_only_local").get(), 3);
// start another node, index another doc and replicate.
String nodeC = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
client().prepareIndex(INDEX_NAME).setId("4").setSource("baz", "baz").get();
refresh(INDEX_NAME);
waitForSearchableDocs(4, nodeC, replica);
verifyStoreContent();
}
public void testRestartPrimary() throws Exception {
final String primary = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME);
ensureYellowAndNoInitializingShards(INDEX_NAME);
final String replica = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
assertEquals(getNodeContainingPrimaryShard().getName(), primary);
final int initialDocCount = 1;
client().prepareIndex(INDEX_NAME).setId("1").setSource("foo", "bar").setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE).get();
refresh(INDEX_NAME);
waitForSearchableDocs(initialDocCount, replica, primary);
internalCluster().restartNode(primary);
ensureGreen(INDEX_NAME);
assertEquals(getNodeContainingPrimaryShard().getName(), replica);
flushAndRefresh(INDEX_NAME);
waitForSearchableDocs(initialDocCount, replica, primary);
verifyStoreContent();
}
public void testCancelPrimaryAllocation() throws Exception {
// this test cancels allocation on the primary - promoting the new replica and recreating the former primary as a replica.
final String primary = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME);
ensureYellowAndNoInitializingShards(INDEX_NAME);
final String replica = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
final int initialDocCount = 1;
client().prepareIndex(INDEX_NAME).setId("1").setSource("foo", "bar").setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE).get();
refresh(INDEX_NAME);
waitForSearchableDocs(initialDocCount, replica, primary);
final IndexShard indexShard = getIndexShard(primary, INDEX_NAME);
client().admin()
.cluster()
.prepareReroute()
.add(new CancelAllocationCommand(INDEX_NAME, indexShard.shardId().id(), primary, true))
.execute()
.actionGet();
ensureGreen(INDEX_NAME);
assertEquals(getNodeContainingPrimaryShard().getName(), replica);
flushAndRefresh(INDEX_NAME);
waitForSearchableDocs(initialDocCount, replica, primary);
verifyStoreContent();
}
public void testReplicationAfterPrimaryRefreshAndFlush() throws Exception {
final String nodeA = internalCluster().startDataOnlyNode();
final String nodeB = internalCluster().startDataOnlyNode();
final Settings settings = Settings.builder()
.put(indexSettings())
.put(EngineConfig.INDEX_CODEC_SETTING.getKey(), randomFrom(new ArrayList<>(CODECS) {
{
add(CodecService.LUCENE_DEFAULT_CODEC);
}
}))
.build();
createIndex(INDEX_NAME, settings);
ensureGreen(INDEX_NAME);
final int initialDocCount = scaledRandomIntBetween(0, 200);
try (
BackgroundIndexer indexer = new BackgroundIndexer(
INDEX_NAME,
"_doc",
client(),
-1,
RandomizedTest.scaledRandomIntBetween(2, 5),
false,
random()
)
) {
indexer.start(initialDocCount);
waitForDocs(initialDocCount, indexer);
refresh(INDEX_NAME);
waitForSearchableDocs(initialDocCount, nodeA, nodeB);
final int additionalDocCount = scaledRandomIntBetween(0, 200);
final int expectedHitCount = initialDocCount + additionalDocCount;
indexer.start(additionalDocCount);
waitForDocs(expectedHitCount, indexer);
flushAndRefresh(INDEX_NAME);
waitForSearchableDocs(expectedHitCount, nodeA, nodeB);
ensureGreen(INDEX_NAME);
verifyStoreContent();
}
}
public void testIndexReopenClose() throws Exception {
final String primary = internalCluster().startDataOnlyNode();
final String replica = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME);
ensureGreen(INDEX_NAME);
final int initialDocCount = scaledRandomIntBetween(100, 200);
try (
BackgroundIndexer indexer = new BackgroundIndexer(
INDEX_NAME,
"_doc",
client(),
-1,
RandomizedTest.scaledRandomIntBetween(2, 5),
false,
random()
)
) {
indexer.start(initialDocCount);
waitForDocs(initialDocCount, indexer);
flush(INDEX_NAME);
waitForSearchableDocs(initialDocCount, primary, replica);
}
logger.info("--> Closing the index ");
client().admin().indices().prepareClose(INDEX_NAME).get();
logger.info("--> Opening the index");
client().admin().indices().prepareOpen(INDEX_NAME).get();
ensureGreen(INDEX_NAME);
waitForSearchableDocs(initialDocCount, primary, replica);
verifyStoreContent();
}
public void testScrollWithConcurrentIndexAndSearch() throws Exception {
final String primary = internalCluster().startDataOnlyNode();
final String replica = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME);
ensureGreen(INDEX_NAME);
final List<ActionFuture<IndexResponse>> pendingIndexResponses = new ArrayList<>();
final List<ActionFuture<SearchResponse>> pendingSearchResponse = new ArrayList<>();
final int searchCount = randomIntBetween(10, 20);
final WriteRequest.RefreshPolicy refreshPolicy = randomFrom(WriteRequest.RefreshPolicy.values());
for (int i = 0; i < searchCount; i++) {
pendingIndexResponses.add(
client().prepareIndex(INDEX_NAME)
.setId(Integer.toString(i))
.setRefreshPolicy(refreshPolicy)
.setSource("field", "value" + i)
.execute()
);
flush(INDEX_NAME);
forceMerge();
}
final SearchResponse searchResponse = client().prepareSearch()
.setQuery(matchAllQuery())
.setIndices(INDEX_NAME)
.setRequestCache(false)
.setScroll(TimeValue.timeValueDays(1))
.setSize(10)
.get();
for (int i = searchCount; i < searchCount * 2; i++) {
pendingIndexResponses.add(
client().prepareIndex(INDEX_NAME)
.setId(Integer.toString(i))
.setRefreshPolicy(refreshPolicy)
.setSource("field", "value" + i)
.execute()
);
}
flush(INDEX_NAME);
forceMerge();
client().prepareClearScroll().addScrollId(searchResponse.getScrollId()).get();
assertBusy(() -> {
client().admin().indices().prepareRefresh().execute().actionGet();
assertTrue(pendingIndexResponses.stream().allMatch(ActionFuture::isDone));
assertTrue(pendingSearchResponse.stream().allMatch(ActionFuture::isDone));
}, 1, TimeUnit.MINUTES);
verifyStoreContent();
waitForSearchableDocs(INDEX_NAME, 2 * searchCount, List.of(primary, replica));
}
public void testMultipleShards() throws Exception {
Settings indexSettings = Settings.builder()
.put(super.indexSettings())
.put(IndexMetadata.SETTING_NUMBER_OF_SHARDS, 3)
.put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 1)
.put(IndexModule.INDEX_QUERY_CACHE_ENABLED_SETTING.getKey(), false)
.put(IndexMetadata.SETTING_REPLICATION_TYPE, ReplicationType.SEGMENT)
.build();
final String nodeA = internalCluster().startDataOnlyNode();
final String nodeB = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME, indexSettings);
ensureGreen(INDEX_NAME);
final int initialDocCount = scaledRandomIntBetween(1, 200);
try (
BackgroundIndexer indexer = new BackgroundIndexer(
INDEX_NAME,
"_doc",
client(),
-1,
RandomizedTest.scaledRandomIntBetween(2, 5),
false,
random()
)
) {
indexer.start(initialDocCount);
waitForDocs(initialDocCount, indexer);
refresh(INDEX_NAME);
waitForSearchableDocs(initialDocCount, nodeA, nodeB);
final int additionalDocCount = scaledRandomIntBetween(0, 200);
final int expectedHitCount = initialDocCount + additionalDocCount;
indexer.start(additionalDocCount);
waitForDocs(expectedHitCount, indexer);
flushAndRefresh(INDEX_NAME);
waitForSearchableDocs(expectedHitCount, nodeA, nodeB);
ensureGreen(INDEX_NAME);
verifyStoreContent();
}
}
public void testReplicationAfterForceMerge() throws Exception {
final String nodeA = internalCluster().startDataOnlyNode();
final String nodeB = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME);
ensureGreen(INDEX_NAME);
final int initialDocCount = scaledRandomIntBetween(0, 200);
final int additionalDocCount = scaledRandomIntBetween(0, 200);
final int expectedHitCount = initialDocCount + additionalDocCount;
try (
BackgroundIndexer indexer = new BackgroundIndexer(
INDEX_NAME,
"_doc",
client(),
-1,
RandomizedTest.scaledRandomIntBetween(2, 5),
false,
random()
)
) {
indexer.start(initialDocCount);
waitForDocs(initialDocCount, indexer);
flush(INDEX_NAME);
waitForSearchableDocs(initialDocCount, nodeA, nodeB);
// Index a second set of docs so we can merge into one segment.
indexer.start(additionalDocCount);
waitForDocs(expectedHitCount, indexer);
waitForSearchableDocs(expectedHitCount, nodeA, nodeB);
// Force a merge here so that the in memory SegmentInfos does not reference old segments on disk.
client().admin().indices().prepareForceMerge(INDEX_NAME).setMaxNumSegments(1).setFlush(false).get();
refresh(INDEX_NAME);
verifyStoreContent();
}
}
/**
* This test verifies that segment replication does not fail for closed indices
*/
public void testClosedIndices() {
List<String> nodes = new ArrayList<>();
// start 1st node so that it contains the primary
nodes.add(internalCluster().startDataOnlyNode());
createIndex(INDEX_NAME, super.indexSettings());
ensureYellowAndNoInitializingShards(INDEX_NAME);
// start 2nd node so that it contains the replica
nodes.add(internalCluster().startDataOnlyNode());
ensureGreen(INDEX_NAME);
logger.info("--> Close index");
assertAcked(client().admin().indices().prepareClose(INDEX_NAME));
logger.info("--> waiting for allocation to have shards assigned");
waitForRelocation(ClusterHealthStatus.GREEN);
}
/**
* This test validates the primary node drop does not result in shard failure on replica.
* @throws Exception when issue is encountered
*/
public void testNodeDropWithOngoingReplication() throws Exception {
final String primaryNode = internalCluster().startDataOnlyNode();
createIndex(
INDEX_NAME,
Settings.builder()
.put(indexSettings())
.put(IndexMetadata.SETTING_NUMBER_OF_SHARDS, 1)
.put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 1)
.put("index.refresh_interval", -1)
.build()
);
ensureYellow(INDEX_NAME);
final String replicaNode = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
ClusterState state = client().admin().cluster().prepareState().execute().actionGet().getState();
// Get replica allocation id
final String replicaAllocationId = state.routingTable()
.index(INDEX_NAME)
.shardsWithState(ShardRoutingState.STARTED)
.stream()
.filter(routing -> routing.primary() == false)
.findFirst()
.get()
.allocationId()
.getId();
DiscoveryNode primaryDiscovery = state.nodes().resolveNode(primaryNode);
CountDownLatch blockFileCopy = new CountDownLatch(1);
MockTransportService primaryTransportService = ((MockTransportService) internalCluster().getInstance(
TransportService.class,
primaryNode
));
primaryTransportService.addSendBehavior(
internalCluster().getInstance(TransportService.class, replicaNode),
(connection, requestId, action, request, options) -> {
if (action.equals(SegmentReplicationTargetService.Actions.FILE_CHUNK)) {
FileChunkRequest req = (FileChunkRequest) request;
logger.debug("file chunk [{}] lastChunk: {}", req, req.lastChunk());
if (req.name().endsWith("cfs") && req.lastChunk()) {
try {
blockFileCopy.await();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
throw new NodeClosedException(primaryDiscovery);
}
}
connection.sendRequest(requestId, action, request, options);
}
);
final int docCount = scaledRandomIntBetween(10, 200);
for (int i = 0; i < docCount; i++) {
client().prepareIndex(INDEX_NAME).setId(Integer.toString(i)).setSource("field", "value" + i).execute().get();
}
// Refresh, this should trigger round of segment replication
refresh(INDEX_NAME);
blockFileCopy.countDown();
internalCluster().stopRandomNode(InternalTestCluster.nameFilter(primaryNode));
ensureYellow(INDEX_NAME);
assertBusy(() -> { assertDocCounts(docCount, replicaNode); });
state = client().admin().cluster().prepareState().execute().actionGet().getState();
// replica now promoted as primary should have same allocation id
final String currentAllocationID = state.routingTable()
.index(INDEX_NAME)
.shardsWithState(ShardRoutingState.STARTED)
.stream()
.filter(routing -> routing.primary())
.findFirst()
.get()
.allocationId()
.getId();
assertEquals(currentAllocationID, replicaAllocationId);
}
public void testCancellation() throws Exception {
final String primaryNode = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME, Settings.builder().put(indexSettings()).put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 1).build());
ensureYellow(INDEX_NAME);
final String replicaNode = internalCluster().startDataOnlyNode();
final SegmentReplicationSourceService segmentReplicationSourceService = internalCluster().getInstance(
SegmentReplicationSourceService.class,
primaryNode
);
final IndexShard primaryShard = getIndexShard(primaryNode, INDEX_NAME);
CountDownLatch latch = new CountDownLatch(1);
MockTransportService mockTransportService = ((MockTransportService) internalCluster().getInstance(
TransportService.class,
primaryNode
));
mockTransportService.addSendBehavior(
internalCluster().getInstance(TransportService.class, replicaNode),
(connection, requestId, action, request, options) -> {
if (action.equals(SegmentReplicationTargetService.Actions.FILE_CHUNK)) {
FileChunkRequest req = (FileChunkRequest) request;
logger.debug("file chunk [{}] lastChunk: {}", req, req.lastChunk());
if (req.name().endsWith("cfs") && req.lastChunk()) {
try {
latch.await();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}
connection.sendRequest(requestId, action, request, options);
}
);
final int docCount = scaledRandomIntBetween(0, 200);
try (
BackgroundIndexer indexer = new BackgroundIndexer(
INDEX_NAME,
"_doc",
client(),
-1,
RandomizedTest.scaledRandomIntBetween(2, 5),
false,
random()
)
) {
indexer.start(docCount);
waitForDocs(docCount, indexer);
flush(INDEX_NAME);
}
segmentReplicationSourceService.beforeIndexShardClosed(primaryShard.shardId(), primaryShard, indexSettings());
latch.countDown();
assertDocCounts(docCount, primaryNode);
}
public void testStartReplicaAfterPrimaryIndexesDocs() throws Exception {
final String primaryNode = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME, Settings.builder().put(indexSettings()).put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 0).build());
ensureGreen(INDEX_NAME);
// Index a doc to create the first set of segments. _s1.si
client().prepareIndex(INDEX_NAME).setId("1").setSource("foo", "bar").get();
// Flush segments to disk and create a new commit point (Primary: segments_3, _s1.si)
flushAndRefresh(INDEX_NAME);
assertHitCount(client(primaryNode).prepareSearch(INDEX_NAME).setSize(0).setPreference("_only_local").get(), 1);
// Index to create another segment
client().prepareIndex(INDEX_NAME).setId("2").setSource("foo", "bar").get();
// Force a merge here so that the in memory SegmentInfos does not reference old segments on disk.
client().admin().indices().prepareForceMerge(INDEX_NAME).setMaxNumSegments(1).setFlush(false).get();
refresh(INDEX_NAME);
assertAcked(
client().admin()
.indices()
.prepareUpdateSettings(INDEX_NAME)
.setSettings(Settings.builder().put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 1))
);
final String replicaNode = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
assertHitCount(client(primaryNode).prepareSearch(INDEX_NAME).setSize(0).setPreference("_only_local").get(), 2);
assertHitCount(client(replicaNode).prepareSearch(INDEX_NAME).setSize(0).setPreference("_only_local").get(), 2);
client().prepareIndex(INDEX_NAME).setId("3").setSource("foo", "bar").get();
refresh(INDEX_NAME);
waitForSearchableDocs(3, primaryNode, replicaNode);
assertHitCount(client(primaryNode).prepareSearch(INDEX_NAME).setSize(0).setPreference("_only_local").get(), 3);
assertHitCount(client(replicaNode).prepareSearch(INDEX_NAME).setSize(0).setPreference("_only_local").get(), 3);
verifyStoreContent();
}
public void testDeleteOperations() throws Exception {
final String nodeA = internalCluster().startDataOnlyNode();
final String nodeB = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME);
ensureGreen(INDEX_NAME);
final int initialDocCount = scaledRandomIntBetween(1, 20);
try (
BackgroundIndexer indexer = new BackgroundIndexer(
INDEX_NAME,
"_doc",
client(),
-1,
RandomizedTest.scaledRandomIntBetween(2, 5),
false,
random()
)
) {
indexer.start(initialDocCount);
waitForDocs(initialDocCount, indexer);
refresh(INDEX_NAME);
waitForSearchableDocs(initialDocCount, nodeA, nodeB);
final int additionalDocCount = scaledRandomIntBetween(0, 20);
final int expectedHitCount = initialDocCount + additionalDocCount;
indexer.start(additionalDocCount);
waitForDocs(expectedHitCount, indexer);
waitForSearchableDocs(expectedHitCount, nodeA, nodeB);
ensureGreen(INDEX_NAME);
Set<String> ids = indexer.getIds();
assertFalse(ids.isEmpty());
String id = ids.toArray()[0].toString();
client(nodeA).prepareDelete(INDEX_NAME, id).setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE).get();
refresh(INDEX_NAME);
waitForSearchableDocs(expectedHitCount - 1, nodeA, nodeB);
verifyStoreContent();
}
}
/**
* This tests that the max seqNo we send to replicas is accurate and that after failover
* the new primary starts indexing from the correct maxSeqNo and replays the correct count of docs
* from xlog.
*/
public void testReplicationPostDeleteAndForceMerge() throws Exception {
final String primary = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME);
final String replica = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
final int initialDocCount = scaledRandomIntBetween(10, 200);
for (int i = 0; i < initialDocCount; i++) {
client().prepareIndex(INDEX_NAME).setId(String.valueOf(i)).setSource("foo", "bar").get();
}
refresh(INDEX_NAME);
waitForSearchableDocs(initialDocCount, primary, replica);
final int deletedDocCount = randomIntBetween(10, initialDocCount);
for (int i = 0; i < deletedDocCount; i++) {
client(primary).prepareDelete(INDEX_NAME, String.valueOf(i)).setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE).get();
}
client().admin().indices().prepareForceMerge(INDEX_NAME).setMaxNumSegments(1).setFlush(false).get();
// randomly flush here after the force merge to wipe any old segments.
if (randomBoolean()) {
flush(INDEX_NAME);
}
final IndexShard primaryShard = getIndexShard(primary, INDEX_NAME);
final IndexShard replicaShard = getIndexShard(replica, INDEX_NAME);
assertBusy(
() -> assertEquals(
primaryShard.getLatestReplicationCheckpoint().getSegmentInfosVersion(),
replicaShard.getLatestReplicationCheckpoint().getSegmentInfosVersion()
)
);
// add some docs to the xlog and drop primary.
final int additionalDocs = randomIntBetween(1, 50);
for (int i = initialDocCount; i < initialDocCount + additionalDocs; i++) {
client().prepareIndex(INDEX_NAME).setId(String.valueOf(i)).setSource("foo", "bar").get();
}
// Drop the primary and wait until replica is promoted.
internalCluster().stopRandomNode(InternalTestCluster.nameFilter(primary));
ensureYellowAndNoInitializingShards(INDEX_NAME);
final ShardRouting replicaShardRouting = getShardRoutingForNodeName(replica);
assertNotNull(replicaShardRouting);
assertTrue(replicaShardRouting + " should be promoted as a primary", replicaShardRouting.primary());
refresh(INDEX_NAME);
final long expectedHitCount = initialDocCount + additionalDocs - deletedDocCount;
assertHitCount(client(replica).prepareSearch(INDEX_NAME).setSize(0).setPreference("_only_local").get(), expectedHitCount);
int expectedMaxSeqNo = initialDocCount + deletedDocCount + additionalDocs - 1;
assertEquals(expectedMaxSeqNo, replicaShard.seqNoStats().getMaxSeqNo());
// index another doc.
client().prepareIndex(INDEX_NAME).setId(String.valueOf(expectedMaxSeqNo + 1)).setSource("another", "doc").get();
refresh(INDEX_NAME);
assertHitCount(client(replica).prepareSearch(INDEX_NAME).setSize(0).setPreference("_only_local").get(), expectedHitCount + 1);
}
public void testUpdateOperations() throws Exception {
final String primary = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME);
ensureYellow(INDEX_NAME);
final String replica = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
final int initialDocCount = scaledRandomIntBetween(0, 200);
try (
BackgroundIndexer indexer = new BackgroundIndexer(
INDEX_NAME,
"_doc",
client(),
-1,
RandomizedTest.scaledRandomIntBetween(2, 5),
false,
random()
)
) {
indexer.start(initialDocCount);
waitForDocs(initialDocCount, indexer);
refresh(INDEX_NAME);
waitForSearchableDocs(initialDocCount, asList(primary, replica));
final int additionalDocCount = scaledRandomIntBetween(0, 200);
final int expectedHitCount = initialDocCount + additionalDocCount;
indexer.start(additionalDocCount);
waitForDocs(expectedHitCount, indexer);
waitForSearchableDocs(expectedHitCount, asList(primary, replica));
Set<String> ids = indexer.getIds();
String id = ids.toArray()[0].toString();
UpdateResponse updateResponse = client(primary).prepareUpdate(INDEX_NAME, id)
.setDoc(Requests.INDEX_CONTENT_TYPE, "foo", "baz")
.setRefreshPolicy(WriteRequest.RefreshPolicy.WAIT_UNTIL)
.get();
assertFalse("request shouldn't have forced a refresh", updateResponse.forcedRefresh());
assertEquals(2, updateResponse.getVersion());
refresh(INDEX_NAME);
verifyStoreContent();
assertSearchHits(client(primary).prepareSearch(INDEX_NAME).setQuery(matchQuery("foo", "baz")).get(), id);
assertSearchHits(client(replica).prepareSearch(INDEX_NAME).setQuery(matchQuery("foo", "baz")).get(), id);
}
}
public void testDropPrimaryDuringReplication() throws Exception {
final int replica_count = 6;
final Settings settings = Settings.builder()
.put(indexSettings())
.put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, replica_count)
.put(IndexMetadata.SETTING_REPLICATION_TYPE, ReplicationType.SEGMENT)
.build();
final String primaryNode = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME, settings);
final List<String> dataNodes = internalCluster().startDataOnlyNodes(6);
ensureGreen(INDEX_NAME);
int initialDocCount = scaledRandomIntBetween(100, 200);
try (
BackgroundIndexer indexer = new BackgroundIndexer(
INDEX_NAME,
"_doc",
client(),
-1,
RandomizedTest.scaledRandomIntBetween(2, 5),
false,
random()
)
) {
indexer.start(initialDocCount);
waitForDocs(initialDocCount, indexer);
refresh(INDEX_NAME);
// don't wait for replication to complete, stop the primary immediately.
internalCluster().stopRandomNode(InternalTestCluster.nameFilter(primaryNode));
ensureYellow(INDEX_NAME);
// start another replica.
dataNodes.add(internalCluster().startDataOnlyNode());
ensureGreen(INDEX_NAME);
waitForSearchableDocs(initialDocCount, dataNodes);
// index another doc and refresh - without this the new replica won't catch up.
String docId = String.valueOf(initialDocCount + 1);
client().prepareIndex(INDEX_NAME).setId(docId).setSource("foo", "bar").get();
flushAndRefresh(INDEX_NAME);
waitForSearchableDocs(initialDocCount + 1, dataNodes);
verifyStoreContent();
}
}
public void testReplicaHasDiffFilesThanPrimary() throws Exception {
final String primaryNode = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME, Settings.builder().put(indexSettings()).put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 1).build());
ensureYellow(INDEX_NAME);
final String replicaNode = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
final IndexShard replicaShard = getIndexShard(replicaNode, INDEX_NAME);
IndexWriterConfig iwc = newIndexWriterConfig().setOpenMode(IndexWriterConfig.OpenMode.APPEND);
// create a doc to index
int numDocs = 2 + random().nextInt(100);
List<Document> docs = new ArrayList<>();
for (int i = 0; i < numDocs; i++) {
Document doc = new Document();
doc.add(new StringField("id", "" + i, random().nextBoolean() ? Field.Store.YES : Field.Store.NO));
doc.add(
new TextField(
"body",
TestUtil.randomRealisticUnicodeString(random()),
random().nextBoolean() ? Field.Store.YES : Field.Store.NO
)
);
doc.add(new SortedDocValuesField("dv", new BytesRef(TestUtil.randomRealisticUnicodeString(random()))));
docs.add(doc);
}
// create some segments on the replica before copy.
try (IndexWriter writer = new IndexWriter(replicaShard.store().directory(), iwc)) {
for (Document d : docs) {
writer.addDocument(d);
}
writer.flush();
writer.commit();
}
final SegmentInfos segmentInfos = SegmentInfos.readLatestCommit(replicaShard.store().directory());
replicaShard.finalizeReplication(segmentInfos);
ensureYellow(INDEX_NAME);
final int docCount = scaledRandomIntBetween(10, 200);
for (int i = 0; i < docCount; i++) {
client().prepareIndex(INDEX_NAME).setId(Integer.toString(i)).setSource("field", "value" + i).execute().get();
// Refresh, this should trigger round of segment replication
refresh(INDEX_NAME);
}
ensureGreen(INDEX_NAME);
waitForSearchableDocs(docCount, primaryNode, replicaNode);
verifyStoreContent();
final IndexShard replicaAfterFailure = getIndexShard(replicaNode, INDEX_NAME);
assertNotEquals(replicaAfterFailure.routingEntry().allocationId().getId(), replicaShard.routingEntry().allocationId().getId());
}
public void testPressureServiceStats() throws Exception {
final String primaryNode = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME);
ensureYellow(INDEX_NAME);
final String replicaNode = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
int initialDocCount = scaledRandomIntBetween(100, 200);
try (
BackgroundIndexer indexer = new BackgroundIndexer(
INDEX_NAME,
"_doc",
client(),
-1,
RandomizedTest.scaledRandomIntBetween(2, 5),
false,
random()
)
) {
indexer.start(initialDocCount);
waitForDocs(initialDocCount, indexer);
refresh(INDEX_NAME);
// get shard references.
final IndexShard primaryShard = getIndexShard(primaryNode, INDEX_NAME);
final IndexShard replicaShard = getIndexShard(replicaNode, INDEX_NAME);
logger.info("Replica aid {}", replicaShard.routingEntry().allocationId());
logger.info("former primary aid {}", primaryShard.routingEntry().allocationId());
// fetch pressure stats from the Primary's Node.
SegmentReplicationPressureService pressureService = internalCluster().getInstance(
SegmentReplicationPressureService.class,
primaryNode
);
// Fetch pressure stats from the Replica's Node we will assert replica node returns nothing until it is promoted.
SegmentReplicationPressureService replicaNode_service = internalCluster().getInstance(
SegmentReplicationPressureService.class,
replicaNode
);
final Map<ShardId, SegmentReplicationPerGroupStats> shardStats = pressureService.nodeStats().getShardStats();
assertEquals("We should have stats returned for the replication group", 1, shardStats.size());
SegmentReplicationPerGroupStats groupStats = shardStats.get(primaryShard.shardId());
Set<SegmentReplicationShardStats> replicaStats = groupStats.getReplicaStats();
assertAllocationIdsInReplicaShardStats(Set.of(replicaShard.routingEntry().allocationId().getId()), replicaStats);
assertTrue(replicaNode_service.nodeStats().getShardStats().isEmpty());
// drop the primary, this won't hand off pressure stats between old/new primary.
internalCluster().stopRandomNode(InternalTestCluster.nameFilter(primaryNode));
ensureYellowAndNoInitializingShards(INDEX_NAME);
assertTrue("replica should be promoted as a primary", replicaShard.routingEntry().primary());
assertEquals(
"We should have stats returned for the replication group",
1,
replicaNode_service.nodeStats().getShardStats().size()
);
// after the primary is dropped and replica is promoted we won't have a replica assigned yet, so stats per replica should return
// empty.
replicaStats = replicaNode_service.nodeStats().getShardStats().get(primaryShard.shardId()).getReplicaStats();
assertTrue(replicaStats.isEmpty());
// start another replica.
String replicaNode_2 = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
final IndexShard secondReplicaShard = getIndexShard(replicaNode_2, INDEX_NAME);
final String second_replica_aid = secondReplicaShard.routingEntry().allocationId().getId();
waitForSearchableDocs(initialDocCount, replicaNode_2);
assertEquals(
"We should have stats returned for the replication group",
1,
replicaNode_service.nodeStats().getShardStats().size()
);
replicaStats = replicaNode_service.nodeStats().getShardStats().get(replicaShard.shardId()).getReplicaStats();
assertAllocationIdsInReplicaShardStats(Set.of(second_replica_aid), replicaStats);
final SegmentReplicationShardStats replica_entry = replicaStats.stream().findFirst().get();
assertEquals(replica_entry.getCheckpointsBehindCount(), 0);
// test a checkpoint without any new segments
flush(INDEX_NAME);
assertBusy(() -> {
assertEquals(1, replicaNode_service.nodeStats().getShardStats().size());
final Set<SegmentReplicationShardStats> shardStatsSet = replicaNode_service.nodeStats()
.getShardStats()
.get(replicaShard.shardId())
.getReplicaStats();
assertAllocationIdsInReplicaShardStats(Set.of(second_replica_aid), shardStatsSet);
final SegmentReplicationShardStats stats = shardStatsSet.stream().findFirst().get();
assertEquals(0, stats.getCheckpointsBehindCount());
});
}
}
private void assertAllocationIdsInReplicaShardStats(Set<String> expected, Set<SegmentReplicationShardStats> replicaStats) {
assertEquals(expected, replicaStats.stream().map(SegmentReplicationShardStats::getAllocationId).collect(Collectors.toSet()));
}
/**
* Tests a scroll query on the replica
* @throws Exception when issue is encountered
*/
public void testScrollCreatedOnReplica() throws Exception {
// create the cluster with one primary node containing primary shard and replica node containing replica shard
final String primary = internalCluster().startDataOnlyNode();
createIndex(INDEX_NAME);
ensureYellowAndNoInitializingShards(INDEX_NAME);
final String replica = internalCluster().startDataOnlyNode();
ensureGreen(INDEX_NAME);
// index 100 docs
for (int i = 0; i < 100; i++) {
client().prepareIndex(INDEX_NAME)
.setId(String.valueOf(i))
.setSource(jsonBuilder().startObject().field("field", i).endObject())