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CCR/TEST: Limit indexing docs in FollowerFailOverIT #35228

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Nov 3, 2018
Merged

CCR/TEST: Limit indexing docs in FollowerFailOverIT #35228

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79 changes: 69 additions & 10 deletions x-pack/plugin/ccr/src/test/java/org/elasticsearch/xpack/CcrIntegTestCase.java
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@
import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsRequest;
import org.elasticsearch.action.admin.indices.get.GetIndexResponse;
import org.elasticsearch.action.admin.indices.refresh.RefreshResponse;
import org.elasticsearch.action.admin.indices.stats.ShardStats;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.analysis.common.CommonAnalysisPlugin;
Expand All @@ -25,9 +26,11 @@
import org.elasticsearch.cluster.health.ClusterHealthStatus;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.cluster.routing.allocation.DiskThresholdSettings;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.Randomness;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.UUIDs;
import org.elasticsearch.common.bytes.BytesReference;
Expand All @@ -38,6 +41,8 @@
import org.elasticsearch.core.internal.io.IOUtils;
import org.elasticsearch.env.NodeEnvironment;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.engine.DocIdSeqNoAndTerm;
import org.elasticsearch.index.seqno.SeqNoStats;
import org.elasticsearch.index.seqno.SequenceNumbers;
import org.elasticsearch.index.shard.IndexShard;
import org.elasticsearch.index.shard.IndexShardTestCase;
Expand Down Expand Up @@ -77,12 +82,15 @@
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.function.Function;
import java.util.stream.Collectors;

import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
import static org.elasticsearch.discovery.DiscoveryModule.DISCOVERY_HOSTS_PROVIDER_SETTING;
Expand All @@ -91,6 +99,7 @@
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertNoFailures;
import static org.hamcrest.Matchers.empty;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.greaterThanOrEqualTo;
import static org.hamcrest.Matchers.lessThanOrEqualTo;

public abstract class CcrIntegTestCase extends ESTestCase {
Expand Down Expand Up @@ -235,10 +244,12 @@ protected final ClusterHealthStatus ensureLeaderYellow(String... indices) {
}

protected final ClusterHealthStatus ensureLeaderGreen(String... indices) {
logger.info("ensure green leader indices {}", Arrays.toString(indices));
return ensureColor(clusterGroup.leaderCluster, ClusterHealthStatus.GREEN, TimeValue.timeValueSeconds(30), false, indices);
}

protected final ClusterHealthStatus ensureFollowerGreen(String... indices) {
logger.info("ensure green follower indices {}", Arrays.toString(indices));
return ensureColor(clusterGroup.followerCluster, ClusterHealthStatus.GREEN, TimeValue.timeValueSeconds(30), false, indices);
}

Expand Down Expand Up @@ -386,20 +397,54 @@ public static ResumeFollowAction.Request resumeFollow(String followerIndex) {
return request;
}

protected void assertSameDocCount(String leaderIndex, String followerIndex) throws Exception {
refresh(leaderClient(), leaderIndex);
SearchRequest request1 = new SearchRequest(leaderIndex);
request1.source(new SearchSourceBuilder().size(0));
SearchResponse response1 = leaderClient().search(request1).actionGet();
/**
* This asserts the index is fully replicated from the leader index to the follower index. It first verifies that the seq_no_stats
* on the follower equal the leader's; then verifies the existing pairs of (docId, seqNo) on the follower also equal the leader.
*/
protected void assertIndexFullyReplicatedToFollower(String leaderIndex, String followerIndex) throws Exception {
logger.info("--> asserting seq_no_stats between {} and {}", leaderIndex, followerIndex);
assertBusy(() -> {
refresh(followerClient(), followerIndex);
SearchRequest request2 = new SearchRequest(followerIndex);
request2.source(new SearchSourceBuilder().size(0));
SearchResponse response2 = followerClient().search(request2).actionGet();
assertThat(response2.getHits().getTotalHits(), equalTo(response1.getHits().getTotalHits()));
Map<Integer, SeqNoStats> leaderStats = new HashMap<>();
for (ShardStats shardStat : leaderClient().admin().indices().prepareStats(leaderIndex).clear().get().getShards()) {
if (shardStat.getSeqNoStats() == null) {
throw new AssertionError("leader seq_no_stats is not available [" + Strings.toString(shardStat) + "]");
}
leaderStats.put(shardStat.getShardRouting().shardId().id(), shardStat.getSeqNoStats());
}
Map<Integer, SeqNoStats> followerStats = new HashMap<>();
for (ShardStats shardStat : followerClient().admin().indices().prepareStats(followerIndex).clear().get().getShards()) {
if (shardStat.getSeqNoStats() == null) {
throw new AssertionError("follower seq_no_stats is not available [" + Strings.toString(shardStat) + "]");
}
followerStats.put(shardStat.getShardRouting().shardId().id(), shardStat.getSeqNoStats());
}
assertThat(leaderStats, equalTo(followerStats));
}, 60, TimeUnit.SECONDS);
logger.info("--> asserting <<docId,seqNo>> between {} and {}", leaderIndex, followerIndex);
assertBusy(() -> {
assertThat(getDocIdAndSeqNos(clusterGroup.leaderCluster, leaderIndex),
equalTo(getDocIdAndSeqNos(clusterGroup.followerCluster, followerIndex)));
}, 60, TimeUnit.SECONDS);
}

private Map<Integer, List<DocIdSeqNoAndTerm>> getDocIdAndSeqNos(InternalTestCluster cluster, String index) throws IOException {
final ClusterState state = cluster.client().admin().cluster().prepareState().get().getState();
List<ShardRouting> shardRoutings = state.routingTable().allShards(index);
Randomness.shuffle(shardRoutings);
final Map<Integer, List<DocIdSeqNoAndTerm>> docs = new HashMap<>();
for (ShardRouting shardRouting : shardRoutings) {
if (shardRouting == null || shardRouting.assignedToNode() == false || docs.containsKey(shardRouting.shardId().id())) {
continue;
}
IndexShard indexShard = cluster.getInstance(IndicesService.class, state.nodes().get(shardRouting.currentNodeId()).getName())
.indexServiceSafe(shardRouting.index()).getShard(shardRouting.id());
docs.put(shardRouting.shardId().id(), IndexShardTestCase.getDocIdAndSeqNos(indexShard).stream()
.map(d -> new DocIdSeqNoAndTerm(d.getId(), d.getSeqNo(), 1L)) // normalize primary term as the follower use its own term
.collect(Collectors.toList()));
}
return docs;
}

protected void atLeastDocsIndexed(Client client, String index, long numDocsReplicated) throws InterruptedException {
logger.info("waiting for at least [{}] documents to be indexed into index [{}]", numDocsReplicated, index);
awaitBusy(() -> {
Expand All @@ -411,6 +456,20 @@ protected void atLeastDocsIndexed(Client client, String index, long numDocsRepli
}, 60, TimeUnit.SECONDS);
}

protected void awaitGlobalCheckpointAtLeast(Client client, ShardId shardId, long minimumGlobalCheckpoint) throws Exception {
logger.info("waiting for the global checkpoint on [{}] at least [{}]", shardId, minimumGlobalCheckpoint);
assertBusy(() -> {
ShardStats stats = client.admin().indices().prepareStats(shardId.getIndexName()).clear().get()
.asMap().entrySet().stream().filter(e -> e.getKey().shardId().equals(shardId))
.map(Map.Entry::getValue).findFirst().orElse(null);
if (stats == null || stats.getSeqNoStats() == null) {
throw new AssertionError("seq_no_stats for shard [" + shardId + "] is not found"); // causes assertBusy to retry
}
assertThat(Strings.toString(stats.getSeqNoStats()),
stats.getSeqNoStats().getGlobalCheckpoint(), greaterThanOrEqualTo(minimumGlobalCheckpoint));
}, 60, TimeUnit.SECONDS);
}

protected void assertMaxSeqNoOfUpdatesIsTransferred(Index leaderIndex, Index followerIndex, int numberOfShards) throws Exception {
assertBusy(() -> {
long[] msuOnLeader = new long[numberOfShards];
Expand Down
62 changes: 40 additions & 22 deletions x-pack/plugin/ccr/src/test/java/org/elasticsearch/xpack/ccr/FollowerFailOverIT.java
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Original file line number Diff line number Diff line change
Expand Up @@ -19,11 +19,14 @@
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.IndexSettings;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.test.InternalTestCluster;
import org.elasticsearch.xpack.CcrIntegTestCase;
import org.elasticsearch.xpack.core.ccr.action.PutFollowAction;

import java.util.Locale;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;

Expand All @@ -47,9 +50,17 @@ public void testFailOverOnFollower() throws Exception {
AtomicBoolean stopped = new AtomicBoolean();
Thread[] threads = new Thread[between(1, 8)];
AtomicInteger docID = new AtomicInteger();
Semaphore availableDocs = new Semaphore(0);
for (int i = 0; i < threads.length; i++) {
threads[i] = new Thread(() -> {
while (stopped.get() == false) {
try {
if (availableDocs.tryAcquire(10, TimeUnit.MILLISECONDS) == false) {
continue;
}
} catch (InterruptedException e) {
throw new AssertionError(e);
}
if (frequently()) {
String id = Integer.toString(frequently() ? docID.incrementAndGet() : between(0, 10)); // sometimes update
IndexResponse indexResponse = leaderClient().prepareIndex("leader-index", "doc", id)
Expand All @@ -64,6 +75,7 @@ public void testFailOverOnFollower() throws Exception {
});
threads[i].start();
}
availableDocs.release(between(100, 200));
PutFollowAction.Request follow = putFollow("leader-index", "follower-index");
follow.getFollowRequest().setMaxReadRequestOperationCount(randomIntBetween(32, 2048));
follow.getFollowRequest().setMaxReadRequestSize(new ByteSizeValue(randomIntBetween(1, 4096), ByteSizeUnit.KB));
Expand All @@ -74,7 +86,7 @@ public void testFailOverOnFollower() throws Exception {
logger.info("--> follow params {}", Strings.toString(follow.getFollowRequest()));
followerClient().execute(PutFollowAction.INSTANCE, follow).get();
ensureFollowerGreen("follower-index");
atLeastDocsIndexed(followerClient(), "follower-index", between(20, 60));
awaitGlobalCheckpointAtLeast(followerClient(), new ShardId(resolveFollowerIndex("follower-index"), 0), between(30, 80));
final ClusterState clusterState = getFollowerCluster().clusterService().state();
for (ShardRouting shardRouting : clusterState.routingTable().allShards("follower-index")) {
if (shardRouting.primary()) {
Expand All @@ -83,36 +95,42 @@ public void testFailOverOnFollower() throws Exception {
break;
}
}
availableDocs.release(between(50, 200));
ensureFollowerGreen("follower-index");
atLeastDocsIndexed(followerClient(), "follower-index", between(80, 150));
availableDocs.release(between(50, 200));
awaitGlobalCheckpointAtLeast(followerClient(), new ShardId(resolveFollowerIndex("follower-index"), 0), between(100, 150));
stopped.set(true);
for (Thread thread : threads) {
thread.join();
}
assertSameDocCount("leader-index", "follower-index");
assertIndexFullyReplicatedToFollower("leader-index", "follower-index");
pauseFollow("follower-index");
}

@AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/33337")
public void testFollowIndexAndCloseNode() throws Exception {
getFollowerCluster().ensureAtLeastNumDataNodes(3);
String leaderIndexSettings = getIndexSettings(3, 1, singletonMap(IndexSettings.INDEX_SOFT_DELETES_SETTING.getKey(), "true"));
assertAcked(leaderClient().admin().indices().prepareCreate("index1").setSource(leaderIndexSettings, XContentType.JSON));
ensureLeaderGreen("index1");

AtomicBoolean run = new AtomicBoolean(true);
Semaphore availableDocs = new Semaphore(0);
Thread thread = new Thread(() -> {
int counter = 0;
while (run.get()) {
final String source = String.format(Locale.ROOT, "{\"f\":%d}", counter++);
try {
leaderClient().prepareIndex("index1", "doc")
.setSource(source, XContentType.JSON)
.setTimeout(TimeValue.timeValueSeconds(1))
.get();
} catch (Exception e) {
logger.error("Error while indexing into leader index", e);
if (availableDocs.tryAcquire(10, TimeUnit.MILLISECONDS) == false) {
continue;
}
} catch (InterruptedException e) {
throw new AssertionError(e);
}
final String source = String.format(Locale.ROOT, "{\"f\":%d}", counter++);
IndexResponse indexResp = leaderClient().prepareIndex("index1", "doc")
.setSource(source, XContentType.JSON)
.setTimeout(TimeValue.timeValueSeconds(1))
.get();
logger.info("--> index id={} seq_no={}", indexResp.getId(), indexResp.getSeqNo());
}
});
thread.start();
Expand All @@ -125,19 +143,19 @@ public void testFollowIndexAndCloseNode() throws Exception {
followRequest.getFollowRequest().setMaxWriteRequestSize(new ByteSizeValue(randomIntBetween(1, 4096), ByteSizeUnit.KB));
followRequest.getFollowRequest().setMaxOutstandingWriteRequests(randomIntBetween(1, 10));
followerClient().execute(PutFollowAction.INSTANCE, followRequest).get();
logger.info("--> follow params {}", Strings.toString(followRequest.getFollowRequest()));

long maxNumDocsReplicated = Math.min(1000, randomLongBetween(followRequest.getFollowRequest().getMaxReadRequestOperationCount(),
followRequest.getFollowRequest().getMaxReadRequestOperationCount() * 10));
long minNumDocsReplicated = maxNumDocsReplicated / 3L;
logger.info("waiting for at least [{}] documents to be indexed and then stop a random data node", minNumDocsReplicated);
atLeastDocsIndexed(followerClient(), "index2", minNumDocsReplicated);
int maxOpsPerRead = followRequest.getFollowRequest().getMaxReadRequestOperationCount();
int maxNumDocsReplicated = Math.min(between(50, 500), between(maxOpsPerRead, maxOpsPerRead * 10));
availableDocs.release(maxNumDocsReplicated / 2 + 1);
atLeastDocsIndexed(followerClient(), "index2", maxNumDocsReplicated / 3);
getFollowerCluster().stopRandomNonMasterNode();
logger.info("waiting for at least [{}] documents to be indexed", maxNumDocsReplicated);
atLeastDocsIndexed(followerClient(), "index2", maxNumDocsReplicated);
availableDocs.release(maxNumDocsReplicated / 2 + 1);
atLeastDocsIndexed(followerClient(), "index2", maxNumDocsReplicated * 2 / 3);
run.set(false);
thread.join();

assertSameDocCount("index1", "index2");
assertIndexFullyReplicatedToFollower("index1", "index2");
pauseFollow("index2");
assertMaxSeqNoOfUpdatesIsTransferred(resolveLeaderIndex("index1"), resolveFollowerIndex("index2"), 3);
}
Expand Down Expand Up @@ -188,15 +206,15 @@ public void testAddNewReplicasOnFollower() throws Exception {
}
});
flushingOnFollower.start();
atLeastDocsIndexed(followerClient(), "follower-index", 50);
awaitGlobalCheckpointAtLeast(followerClient(), new ShardId(resolveFollowerIndex("follower-index"), 0), 50);
followerClient().admin().indices().prepareUpdateSettings("follower-index")
.setSettings(Settings.builder().put(IndexMetaData.SETTING_NUMBER_OF_REPLICAS, numberOfReplicas + 1).build()).get();
ensureFollowerGreen("follower-index");
atLeastDocsIndexed(followerClient(), "follower-index", 100);
awaitGlobalCheckpointAtLeast(followerClient(), new ShardId(resolveFollowerIndex("follower-index"), 0), 100);
stopped.set(true);
flushingOnFollower.join();
indexingOnLeader.join();
assertSameDocCount("leader-index", "follower-index");
assertIndexFullyReplicatedToFollower("leader-index", "follower-index");
pauseFollow("follower-index");
}

Expand Down
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