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Tighten mapping syncing in ccr remote restore #38071

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merged 3 commits into from
Feb 4, 2019
Merged

Tighten mapping syncing in ccr remote restore #38071

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4a570fa
Tighten mapping syncing in ccr remote restore
dnhatn Jan 30, 2019
7715d00
Merge branch 'master' into remote-recovery-mapping
dnhatn Feb 4, 2019
90709b6
wording
dnhatn Feb 4, 2019
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38 changes: 38 additions & 0 deletions x-pack/plugin/ccr/src/main/java/org/elasticsearch/xpack/ccr/action/CcrRequests.java
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Expand Up @@ -6,18 +6,23 @@
package org.elasticsearch.xpack.ccr.action;

import org.elasticsearch.ElasticsearchStatusException;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.cluster.state.ClusterStateRequest;
import org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest;
import org.elasticsearch.action.admin.indices.mapping.put.MappingRequestValidator;
import org.elasticsearch.client.Client;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MappingMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.Index;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.xpack.ccr.CcrSettings;

import java.util.Arrays;
import java.util.List;
import java.util.function.Supplier;
import java.util.stream.Collectors;

public final class CcrRequests {
Expand All @@ -40,6 +45,39 @@ public static PutMappingRequest putMappingRequest(String followerIndex, MappingM
return putMappingRequest;
}

/**
* Gets an {@link IndexMetaData} of the given index. The mapping version and metadata version of the returned {@link IndexMetaData}
* must be at least the provided {@code mappingVersion} and {@code metadataVersion} respectively.
*/
public static void getIndexMetadata(Client client, Index index, long mappingVersion, long metadataVersion,
Supplier<TimeValue> timeoutSupplier, ActionListener<IndexMetaData> listener) {
final ClusterStateRequest request = CcrRequests.metaDataRequest(index.getName());
if (metadataVersion > 0) {
request.waitForMetaDataVersion(metadataVersion).waitForTimeout(timeoutSupplier.get());
}
client.admin().cluster().state(request, ActionListener.wrap(
response -> {
if (response.getState() == null) {
assert metadataVersion > 0 : metadataVersion;
throw new IllegalStateException("timeout to get cluster state with" +
" metadata version [" + metadataVersion + "], mapping version [" + mappingVersion + "]");
}
final MetaData metaData = response.getState().metaData();
final IndexMetaData indexMetaData = metaData.getIndexSafe(index);
if (indexMetaData.getMappingVersion() >= mappingVersion) {
listener.onResponse(indexMetaData);
return;
}
if (timeoutSupplier.get().nanos() < 0) {
throw new IllegalStateException("timeout to get cluster state with mapping version [" + mappingVersion + "]");
}
// ask for the next version.
getIndexMetadata(client, index, mappingVersion, metaData.version() + 1, timeoutSupplier, listener);
},
listener::onFailure
));
}

public static final MappingRequestValidator CCR_PUT_MAPPING_REQUEST_VALIDATOR = (request, state, indices) -> {
if (request.origin() == null) {
return null; // a put-mapping-request on old versions does not have origin.
Expand Down
39 changes: 4 additions & 35 deletions ...plugin/ccr/src/main/java/org/elasticsearch/xpack/ccr/action/ShardFollowTasksExecutor.java
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Expand Up @@ -24,7 +24,6 @@
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MappingMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.routing.IndexRoutingTable;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.CheckedConsumer;
Expand Down Expand Up @@ -59,6 +58,7 @@
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import java.util.function.LongConsumer;
import java.util.function.Supplier;

import static org.elasticsearch.xpack.ccr.CcrLicenseChecker.wrapClient;
import static org.elasticsearch.xpack.ccr.action.TransportResumeFollowAction.extractLeaderShardHistoryUUIDs;
Expand Down Expand Up @@ -111,7 +111,9 @@ protected AllocatedPersistentTask createTask(long id, String type, String action
@Override
protected void innerUpdateMapping(long minRequiredMappingVersion, LongConsumer handler, Consumer<Exception> errorHandler) {
final Index followerIndex = params.getFollowShardId().getIndex();
getIndexMetadata(minRequiredMappingVersion, 0L, params, ActionListener.wrap(
final Index leaderIndex = params.getLeaderShardId().getIndex();
final Supplier<TimeValue> timeout = () -> isStopped() ? TimeValue.MINUS_ONE : waitForMetadataTimeOut;
CcrRequests.getIndexMetadata(remoteClient(params), leaderIndex, minRequiredMappingVersion, 0L, timeout, ActionListener.wrap(
indexMetaData -> {
if (indexMetaData.getMappings().isEmpty()) {
assert indexMetaData.getMappingVersion() == 1;
Expand Down Expand Up @@ -246,39 +248,6 @@ private Client remoteClient(ShardFollowTask params) {
return wrapClient(client.getRemoteClusterClient(params.getRemoteCluster()), params.getHeaders());
}

private void getIndexMetadata(long minRequiredMappingVersion, long minRequiredMetadataVersion,
ShardFollowTask params, ActionListener<IndexMetaData> listener) {
final Index leaderIndex = params.getLeaderShardId().getIndex();
final ClusterStateRequest clusterStateRequest = CcrRequests.metaDataRequest(leaderIndex.getName());
if (minRequiredMetadataVersion > 0) {
clusterStateRequest.waitForMetaDataVersion(minRequiredMetadataVersion).waitForTimeout(waitForMetadataTimeOut);
}
try {
remoteClient(params).admin().cluster().state(clusterStateRequest, ActionListener.wrap(
r -> {
// if wait_for_metadata_version timeout, the response is empty
if (r.getState() == null) {
assert minRequiredMetadataVersion > 0;
getIndexMetadata(minRequiredMappingVersion, minRequiredMetadataVersion, params, listener);
return;
}
final MetaData metaData = r.getState().metaData();
final IndexMetaData indexMetaData = metaData.getIndexSafe(leaderIndex);
if (indexMetaData.getMappingVersion() < minRequiredMappingVersion) {
// ask for the next version.
getIndexMetadata(minRequiredMappingVersion, metaData.version() + 1, params, listener);
} else {
assert metaData.version() >= minRequiredMetadataVersion : metaData.version() + " < " + minRequiredMetadataVersion;
listener.onResponse(indexMetaData);
}
},
listener::onFailure
));
} catch (Exception e) {
listener.onFailure(e);
}
}

interface FollowerStatsInfoHandler {
void accept(String followerHistoryUUID, long globalCheckpoint, long maxSeqNo);
}
Expand Down
14 changes: 12 additions & 2 deletions ...main/java/org/elasticsearch/xpack/ccr/action/repositories/PutCcrRestoreSessionAction.java
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Expand Up @@ -72,7 +72,8 @@ protected PutCcrRestoreSessionResponse shardOperation(PutCcrRestoreSessionReques
throw new ShardNotFoundException(shardId);
}
Store.MetadataSnapshot storeFileMetaData = ccrRestoreService.openSession(request.getSessionUUID(), indexShard);
return new PutCcrRestoreSessionResponse(clusterService.localNode(), storeFileMetaData);
long mappingVersion = indexShard.indexSettings().getIndexMetaData().getMappingVersion();
return new PutCcrRestoreSessionResponse(clusterService.localNode(), storeFileMetaData, mappingVersion);
}

@Override
Expand All @@ -97,33 +98,38 @@ public static class PutCcrRestoreSessionResponse extends ActionResponse {

private DiscoveryNode node;
private Store.MetadataSnapshot storeFileMetaData;
private long mappingVersion;

PutCcrRestoreSessionResponse() {
}

PutCcrRestoreSessionResponse(DiscoveryNode node, Store.MetadataSnapshot storeFileMetaData) {
PutCcrRestoreSessionResponse(DiscoveryNode node, Store.MetadataSnapshot storeFileMetaData, long mappingVersion) {
this.node = node;
this.storeFileMetaData = storeFileMetaData;
this.mappingVersion = mappingVersion;
}

PutCcrRestoreSessionResponse(StreamInput in) throws IOException {
super(in);
node = new DiscoveryNode(in);
storeFileMetaData = new Store.MetadataSnapshot(in);
mappingVersion = in.readVLong();
}

@Override
public void readFrom(StreamInput in) throws IOException {
super.readFrom(in);
node = new DiscoveryNode(in);
storeFileMetaData = new Store.MetadataSnapshot(in);
mappingVersion = in.readVLong();
}

@Override
public void writeTo(StreamOutput out) throws IOException {
super.writeTo(out);
node.writeTo(out);
storeFileMetaData.writeTo(out);
out.writeVLong(mappingVersion);
}

public DiscoveryNode getNode() {
Expand All @@ -133,5 +139,9 @@ public DiscoveryNode getNode() {
public Store.MetadataSnapshot getStoreFileMetaData() {
return storeFileMetaData;
}

public long getMappingVersion() {
return mappingVersion;
}
}
}
41 changes: 23 additions & 18 deletions x-pack/plugin/ccr/src/main/java/org/elasticsearch/xpack/ccr/repository/CcrRepository.java
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Expand Up @@ -29,9 +29,9 @@
import org.elasticsearch.common.metrics.CounterMetric;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.util.CombinedRateLimiter;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.IndexSettings;
import org.elasticsearch.index.engine.EngineException;
import org.elasticsearch.index.shard.IndexShard;
import org.elasticsearch.index.shard.IndexShardRecoveryException;
Expand Down Expand Up @@ -72,6 +72,8 @@
import java.util.Map;
import java.util.Set;
import java.util.function.LongConsumer;
import java.util.function.Supplier;


/**
* This repository relies on a remote cluster for Ccr restores. It is read-only so it can only be used to
Expand Down Expand Up @@ -288,30 +290,31 @@ public void restoreShard(IndexShard indexShard, SnapshotId snapshotId, Version v
String name = metadata.name();
try (RestoreSession restoreSession = openSession(name, remoteClient, leaderShardId, indexShard, recoveryState)) {
restoreSession.restoreFiles();
updateMappings(remoteClient, leaderIndex, restoreSession.mappingVersion, client, indexShard.routingEntry().index());
} catch (Exception e) {
throw new IndexShardRestoreFailedException(indexShard.shardId(), "failed to restore snapshot [" + snapshotId + "]", e);
}

maybeUpdateMappings(client, remoteClient, leaderIndex, indexShard.indexSettings());
}

@Override
public IndexShardSnapshotStatus getShardSnapshotStatus(SnapshotId snapshotId, Version version, IndexId indexId, ShardId leaderShardId) {
throw new UnsupportedOperationException("Unsupported for repository of type: " + TYPE);
}

private void maybeUpdateMappings(Client localClient, Client remoteClient, Index leaderIndex, IndexSettings followerIndexSettings) {
ClusterStateRequest clusterStateRequest = CcrRequests.metaDataRequest(leaderIndex.getName());
ClusterStateResponse clusterState = remoteClient.admin().cluster().state(clusterStateRequest)
.actionGet(ccrSettings.getRecoveryActionTimeout());
IndexMetaData leaderIndexMetadata = clusterState.getState().metaData().getIndexSafe(leaderIndex);
long leaderMappingVersion = leaderIndexMetadata.getMappingVersion();

if (leaderMappingVersion > followerIndexSettings.getIndexMetaData().getMappingVersion()) {
Index followerIndex = followerIndexSettings.getIndex();
MappingMetaData mappingMetaData = leaderIndexMetadata.mapping();
PutMappingRequest putMappingRequest = CcrRequests.putMappingRequest(followerIndex.getName(), mappingMetaData);
localClient.admin().indices().putMapping(putMappingRequest).actionGet(ccrSettings.getRecoveryActionTimeout());
private void updateMappings(Client leaderClient, Index leaderIndex, long leaderMappingVersion,
Client followerClient, Index followerIndex) {
final PlainActionFuture<IndexMetaData> indexMetadataFuture = new PlainActionFuture<>();
final long startTimeInNanos = System.nanoTime();
final Supplier<TimeValue> timeout = () -> {
final long elapsedInNanos = System.nanoTime() - startTimeInNanos;
return TimeValue.timeValueNanos(ccrSettings.getRecoveryActionTimeout().nanos() - elapsedInNanos);
};
CcrRequests.getIndexMetadata(leaderClient, leaderIndex, leaderMappingVersion, 0L, timeout, indexMetadataFuture);
final IndexMetaData leaderIndexMetadata = indexMetadataFuture.actionGet(ccrSettings.getRecoveryActionTimeout());
final MappingMetaData mappingMetaData = leaderIndexMetadata.mapping();
if (mappingMetaData != null) {
final PutMappingRequest putMappingRequest = CcrRequests.putMappingRequest(followerIndex.getName(), mappingMetaData);
followerClient.admin().indices().putMapping(putMappingRequest).actionGet(ccrSettings.getRecoveryActionTimeout());
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}
}

Expand All @@ -321,7 +324,7 @@ private RestoreSession openSession(String repositoryName, Client remoteClient, S
PutCcrRestoreSessionAction.PutCcrRestoreSessionResponse response = remoteClient.execute(PutCcrRestoreSessionAction.INSTANCE,
new PutCcrRestoreSessionRequest(sessionUUID, leaderShardId)).actionGet(ccrSettings.getRecoveryActionTimeout());
return new RestoreSession(repositoryName, remoteClient, sessionUUID, response.getNode(), indexShard, recoveryState,
response.getStoreFileMetaData(), ccrSettings, throttledTime::inc);
response.getStoreFileMetaData(), response.getMappingVersion(), ccrSettings, throttledTime::inc);
}

private static class RestoreSession extends FileRestoreContext implements Closeable {
Expand All @@ -332,17 +335,19 @@ private static class RestoreSession extends FileRestoreContext implements Closea
private final String sessionUUID;
private final DiscoveryNode node;
private final Store.MetadataSnapshot sourceMetaData;
private final long mappingVersion;
private final CcrSettings ccrSettings;
private final LongConsumer throttleListener;

RestoreSession(String repositoryName, Client remoteClient, String sessionUUID, DiscoveryNode node, IndexShard indexShard,
RecoveryState recoveryState, Store.MetadataSnapshot sourceMetaData, CcrSettings ccrSettings,
LongConsumer throttleListener) {
RecoveryState recoveryState, Store.MetadataSnapshot sourceMetaData, long mappingVersion,
CcrSettings ccrSettings, LongConsumer throttleListener) {
super(repositoryName, indexShard, SNAPSHOT_ID, recoveryState, BUFFER_SIZE);
this.remoteClient = remoteClient;
this.sessionUUID = sessionUUID;
this.node = node;
this.sourceMetaData = sourceMetaData;
this.mappingVersion = mappingVersion;
this.ccrSettings = ccrSettings;
this.throttleListener = throttleListener;
}
Expand Down
17 changes: 2 additions & 15 deletions x-pack/plugin/ccr/src/test/java/org/elasticsearch/xpack/ccr/CcrRepositoryIT.java
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Expand Up @@ -390,7 +390,6 @@ public void testIndividualActionsTimeout() throws Exception {
assertAcked(followerClient().admin().cluster().updateSettings(settingsRequest).actionGet());
}

@AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/37887")
public void testFollowerMappingIsUpdated() throws IOException {
String leaderClusterRepoName = CcrRepository.NAME_PREFIX + "leader_cluster";
String leaderIndex = "index1";
Expand All @@ -413,16 +412,8 @@ public void testFollowerMappingIsUpdated() throws IOException {
.renameReplacement(followerIndex).masterNodeTimeout(new TimeValue(1L, TimeUnit.HOURS))
.indexSettings(settingsBuilder);

// TODO: Eventually when the file recovery work is complete, we should test updated mappings by
// indexing to the leader while the recovery is happening. However, into order to that test mappings
// are updated prior to that work, we index documents in the clear session callback. This will
// ensure a mapping change prior to the final mapping check on the follower side.
for (CcrRestoreSourceService restoreSourceService : getLeaderCluster().getDataNodeInstances(CcrRestoreSourceService.class)) {
restoreSourceService.addCloseSessionListener(s -> {
final String source = String.format(Locale.ROOT, "{\"k\":%d}", 1);
leaderClient().prepareIndex("index1", "doc", Long.toString(1)).setSource(source, XContentType.JSON).get();
});
}
final String source = String.format(Locale.ROOT, "{\"k\":%d}", 1);
leaderClient().prepareIndex("index1", "doc", Long.toString(1)).setSource(source, XContentType.JSON).get();

PlainActionFuture<RestoreInfo> future = PlainActionFuture.newFuture();
restoreService.restoreSnapshot(restoreRequest, waitForRestore(clusterService, future));
Expand All @@ -435,10 +426,6 @@ public void testFollowerMappingIsUpdated() throws IOException {
clusterStateRequest.clear();
clusterStateRequest.metaData(true);
clusterStateRequest.indices(followerIndex);
ClusterStateResponse clusterState = followerClient().admin().cluster().state(clusterStateRequest).actionGet();
IndexMetaData followerIndexMetadata = clusterState.getState().metaData().index(followerIndex);
assertEquals(2, followerIndexMetadata.getMappingVersion());
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why remove this?

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Previously we changed mapping twice in the leader: one before opening session and one after. These two events are propagated separately; then the mapping version on the follower is 2. Now, these two events happen before we open session, then the mapping version on the follower is 1 instead of 2. I think verifying the content of the mapping is good enough.

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ok


MappingMetaData mappingMetaData = followerClient().admin().indices().prepareGetMappings("index2").get().getMappings()
.get("index2").get("doc");
assertThat(XContentMapValues.extractValue("properties.k.type", mappingMetaData.sourceAsMap()), equalTo("long"));
Expand Down