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/*
* 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.index.engine.internal;
import com.google.common.collect.Lists;
import org.apache.lucene.index.*;
import org.apache.lucene.index.IndexWriter.IndexReaderWarmer;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.SearcherFactory;
import org.apache.lucene.search.SearcherManager;
import org.apache.lucene.store.AlreadyClosedException;
import org.apache.lucene.store.LockObtainFailedException;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.IOUtils;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.ElasticsearchIllegalStateException;
import org.elasticsearch.Version;
import org.elasticsearch.cluster.routing.operation.hash.djb.DjbHashFunction;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.Preconditions;
import org.elasticsearch.common.collect.MapBuilder;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.HashedBytesRef;
import org.elasticsearch.common.lucene.Lucene;
import org.elasticsearch.common.lucene.SegmentReaderUtils;
import org.elasticsearch.common.lucene.search.XFilteredQuery;
import org.elasticsearch.common.lucene.uid.Versions;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.ByteSizeUnit;
import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.util.concurrent.ConcurrentCollections;
import org.elasticsearch.common.util.concurrent.EsExecutors;
import org.elasticsearch.index.VersionType;
import org.elasticsearch.index.analysis.AnalysisService;
import org.elasticsearch.index.codec.CodecService;
import org.elasticsearch.index.deletionpolicy.SnapshotDeletionPolicy;
import org.elasticsearch.index.deletionpolicy.SnapshotIndexCommit;
import org.elasticsearch.index.engine.*;
import org.elasticsearch.index.indexing.ShardIndexingService;
import org.elasticsearch.index.mapper.Uid;
import org.elasticsearch.index.merge.OnGoingMerge;
import org.elasticsearch.index.merge.policy.IndexUpgraderMergePolicy;
import org.elasticsearch.index.merge.policy.MergePolicyProvider;
import org.elasticsearch.index.merge.scheduler.MergeSchedulerProvider;
import org.elasticsearch.index.search.nested.IncludeNestedDocsQuery;
import org.elasticsearch.index.settings.IndexSettings;
import org.elasticsearch.index.settings.IndexSettingsService;
import org.elasticsearch.index.shard.AbstractIndexShardComponent;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.index.similarity.SimilarityService;
import org.elasticsearch.index.store.Store;
import org.elasticsearch.index.translog.Translog;
import org.elasticsearch.index.translog.TranslogStreams;
import org.elasticsearch.indices.warmer.IndicesWarmer;
import org.elasticsearch.indices.warmer.InternalIndicesWarmer;
import org.elasticsearch.threadpool.ThreadPool;
import java.io.IOException;
import java.util.*;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
/**
*
*/
public class InternalEngine extends AbstractIndexShardComponent implements Engine {
private volatile ByteSizeValue indexingBufferSize;
private volatile int indexConcurrency;
private volatile boolean compoundOnFlush = true;
private long gcDeletesInMillis;
private volatile boolean enableGcDeletes = true;
private volatile String codecName;
private final ThreadPool threadPool;
private final ShardIndexingService indexingService;
private final IndexSettingsService indexSettingsService;
@Nullable
private final InternalIndicesWarmer warmer;
private final Store store;
private final SnapshotDeletionPolicy deletionPolicy;
private final Translog translog;
private final MergePolicyProvider mergePolicyProvider;
private final MergeSchedulerProvider mergeScheduler;
private final AnalysisService analysisService;
private final SimilarityService similarityService;
private final CodecService codecService;
private final ReadWriteLock rwl = new ReentrantReadWriteLock();
private volatile IndexWriter indexWriter;
private final SearcherFactory searcherFactory = new SearchFactory();
private volatile SearcherManager searcherManager;
private volatile boolean closed = false;
// flag indicating if a dirty operation has occurred since the last refresh
private volatile boolean dirty = false;
private volatile boolean possibleMergeNeeded = false;
private final AtomicBoolean optimizeMutex = new AtomicBoolean();
// we use flushNeeded here, since if there are no changes, then the commit won't write
// will not really happen, and then the commitUserData and the new translog will not be reflected
private volatile boolean flushNeeded = false;
private final AtomicInteger flushing = new AtomicInteger();
private final Lock flushLock = new ReentrantLock();
private final RecoveryCounter onGoingRecoveries = new RecoveryCounter();
// A uid (in the form of BytesRef) to the version map
// we use the hashed variant since we iterate over it and check removal and additions on existing keys
private final ConcurrentMap versionMap;
private final Object[] dirtyLocks;
private final Object refreshMutex = new Object();
private final ApplySettings applySettings = new ApplySettings();
private volatile boolean failOnMergeFailure;
private Throwable failedEngine = null;
private final Object failedEngineMutex = new Object();
private final CopyOnWriteArrayList failedEngineListeners = new CopyOnWriteArrayList();
private final AtomicLong translogIdGenerator = new AtomicLong();
private SegmentInfos lastCommittedSegmentInfos;
@Inject
public InternalEngine(ShardId shardId, @IndexSettings Settings indexSettings, ThreadPool threadPool,
IndexSettingsService indexSettingsService, ShardIndexingService indexingService, @Nullable IndicesWarmer warmer,
Store store, SnapshotDeletionPolicy deletionPolicy, Translog translog,
MergePolicyProvider mergePolicyProvider, MergeSchedulerProvider mergeScheduler,
AnalysisService analysisService, SimilarityService similarityService, CodecService codecService) throws EngineException {
super(shardId, indexSettings);
Preconditions.checkNotNull(store, "Store must be provided to the engine");
Preconditions.checkNotNull(deletionPolicy, "Snapshot deletion policy must be provided to the engine");
Preconditions.checkNotNull(translog, "Translog must be provided to the engine");
this.gcDeletesInMillis = indexSettings.getAsTime(INDEX_GC_DELETES, TimeValue.timeValueSeconds(60)).millis();
this.indexingBufferSize = componentSettings.getAsBytesSize("index_buffer_size", new ByteSizeValue(64, ByteSizeUnit.MB)); // not really important, as it is set by the IndexingMemory manager
this.codecName = indexSettings.get(INDEX_CODEC, "default");
this.threadPool = threadPool;
this.indexSettingsService = indexSettingsService;
this.indexingService = indexingService;
this.warmer = (InternalIndicesWarmer) warmer;
this.store = store;
this.deletionPolicy = deletionPolicy;
this.translog = translog;
this.mergePolicyProvider = mergePolicyProvider;
this.mergeScheduler = mergeScheduler;
this.analysisService = analysisService;
this.similarityService = similarityService;
this.codecService = codecService;
this.compoundOnFlush = indexSettings.getAsBoolean(INDEX_COMPOUND_ON_FLUSH, this.compoundOnFlush);
this.indexConcurrency = indexSettings.getAsInt(INDEX_INDEX_CONCURRENCY, Math.max(IndexWriterConfig.DEFAULT_MAX_THREAD_STATES, (int) (EsExecutors.boundedNumberOfProcessors(indexSettings) * 0.65)));
this.versionMap = ConcurrentCollections.newConcurrentMapWithAggressiveConcurrency();
this.dirtyLocks = new Object[indexConcurrency * 50]; // we multiply it to have enough...
for (int i = 0; i < dirtyLocks.length; i++) {
dirtyLocks[i] = new Object();
}
this.indexSettingsService.addListener(applySettings);
this.failOnMergeFailure = indexSettings.getAsBoolean(INDEX_FAIL_ON_MERGE_FAILURE, true);
if (failOnMergeFailure) {
this.mergeScheduler.addFailureListener(new FailEngineOnMergeFailure());
}
}
@Override
public void updateIndexingBufferSize(ByteSizeValue indexingBufferSize) {
ByteSizeValue preValue = this.indexingBufferSize;
rwl.readLock().lock();
try {
this.indexingBufferSize = indexingBufferSize;
IndexWriter indexWriter = this.indexWriter;
if (indexWriter != null) {
indexWriter.getConfig().setRAMBufferSizeMB(this.indexingBufferSize.mbFrac());
}
} finally {
rwl.readLock().unlock();
}
if (preValue.bytes() != indexingBufferSize.bytes()) {
// its inactive, make sure we do a full flush in this case, since the memory
// changes only after a "data" change has happened to the writer
if (indexingBufferSize == Engine.INACTIVE_SHARD_INDEXING_BUFFER && preValue != Engine.INACTIVE_SHARD_INDEXING_BUFFER) {
logger.debug("updating index_buffer_size from [{}] to (inactive) [{}]", preValue, indexingBufferSize);
try {
flush(new Flush().type(Flush.Type.NEW_WRITER));
} catch (EngineClosedException e) {
// ignore
} catch (FlushNotAllowedEngineException e) {
// ignore
} catch (Throwable e) {
logger.warn("failed to flush after setting shard to inactive", e);
}
} else {
logger.debug("updating index_buffer_size from [{}] to [{}]", preValue, indexingBufferSize);
}
}
}
@Override
public void addFailedEngineListener(FailedEngineListener listener) {
failedEngineListeners.add(listener);
}
@Override
public void start() throws EngineException {
rwl.writeLock().lock();
try {
if (indexWriter != null) {
throw new EngineAlreadyStartedException(shardId);
}
if (closed) {
throw new EngineClosedException(shardId);
}
if (logger.isDebugEnabled()) {
logger.debug("starting engine");
}
try {
this.indexWriter = createWriter();
} catch (IOException e) {
throw new EngineCreationFailureException(shardId, "failed to create engine", e);
}
try {
// commit on a just opened writer will commit even if there are no changes done to it
// we rely on that for the commit data translog id key
if (Lucene.indexExists(store.directory())) {
Map commitUserData = Lucene.readSegmentInfos(store.directory()).getUserData();
if (commitUserData.containsKey(Translog.TRANSLOG_ID_KEY)) {
translogIdGenerator.set(Long.parseLong(commitUserData.get(Translog.TRANSLOG_ID_KEY)));
} else {
translogIdGenerator.set(System.currentTimeMillis());
indexWriter.setCommitData(MapBuilder.newMapBuilder().put(Translog.TRANSLOG_ID_KEY, Long.toString(translogIdGenerator.get())).map());
indexWriter.commit();
}
} else {
translogIdGenerator.set(System.currentTimeMillis());
indexWriter.setCommitData(MapBuilder.newMapBuilder().put(Translog.TRANSLOG_ID_KEY, Long.toString(translogIdGenerator.get())).map());
indexWriter.commit();
}
translog.newTranslog(translogIdGenerator.get());
this.searcherManager = buildSearchManager(indexWriter);
readLastCommittedSegmentsInfo();
} catch (IOException e) {
try {
indexWriter.rollback();
} catch (IOException e1) {
// ignore
} finally {
IOUtils.closeWhileHandlingException(indexWriter);
}
throw new EngineCreationFailureException(shardId, "failed to open reader on writer", e);
}
} finally {
rwl.writeLock().unlock();
}
}
private void readLastCommittedSegmentsInfo() throws IOException {
SegmentInfos infos = new SegmentInfos();
infos.read(store.directory());
lastCommittedSegmentInfos = infos;
}
@Override
public TimeValue defaultRefreshInterval() {
return new TimeValue(1, TimeUnit.SECONDS);
}
@Override
public void enableGcDeletes(boolean enableGcDeletes) {
this.enableGcDeletes = enableGcDeletes;
}
public GetResult get(Get get) throws EngineException {
rwl.readLock().lock();
try {
if (get.realtime()) {
VersionValue versionValue = versionMap.get(versionKey(get.uid()));
if (versionValue != null) {
if (versionValue.delete()) {
return GetResult.NOT_EXISTS;
}
if (get.version() != Versions.MATCH_ANY) {
if (get.versionType().isVersionConflict(versionValue.version(), get.version())) {
Uid uid = Uid.createUid(get.uid().text());
throw new VersionConflictEngineException(shardId, uid.type(), uid.id(), versionValue.version(), get.version());
}
}
if (!get.loadSource()) {
return new GetResult(true, versionValue.version(), null);
}
byte[] data = translog.read(versionValue.translogLocation());
if (data != null) {
try {
Translog.Source source = TranslogStreams.readSource(data);
return new GetResult(true, versionValue.version(), source);
} catch (IOException e) {
// switched on us, read it from the reader
}
}
}
}
// no version, get the version from the index, we know that we refresh on flush
Searcher searcher = acquireSearcher("get");
final Versions.DocIdAndVersion docIdAndVersion;
try {
docIdAndVersion = Versions.loadDocIdAndVersion(searcher.reader(), get.uid());
} catch (Throwable e) {
searcher.release();
//TODO: A better exception goes here
throw new EngineException(shardId(), "Couldn't resolve version", e);
}
if (get.version() != Versions.MATCH_ANY && docIdAndVersion != null) {
if (get.versionType().isVersionConflict(docIdAndVersion.version, get.version())) {
searcher.release();
Uid uid = Uid.createUid(get.uid().text());
throw new VersionConflictEngineException(shardId, uid.type(), uid.id(), docIdAndVersion.version, get.version());
}
}
if (docIdAndVersion != null) {
// don't release the searcher on this path, it is the responsability of the caller to call GetResult.release
return new GetResult(searcher, docIdAndVersion);
} else {
searcher.release();
return GetResult.NOT_EXISTS;
}
} finally {
rwl.readLock().unlock();
}
}
@Override
public void create(Create create) throws EngineException {
rwl.readLock().lock();
try {
IndexWriter writer = this.indexWriter;
if (writer == null) {
throw new EngineClosedException(shardId, failedEngine);
}
innerCreate(create, writer);
dirty = true;
possibleMergeNeeded = true;
flushNeeded = true;
} catch (IOException e) {
throw new CreateFailedEngineException(shardId, create, e);
} catch (OutOfMemoryError e) {
failEngine(e);
throw new CreateFailedEngineException(shardId, create, e);
} catch (IllegalStateException e) {
if (e.getMessage().contains("OutOfMemoryError")) {
failEngine(e);
}
throw new CreateFailedEngineException(shardId, create, e);
} finally {
rwl.readLock().unlock();
}
}
private void innerCreate(Create create, IndexWriter writer) throws IOException {
synchronized (dirtyLock(create.uid())) {
HashedBytesRef versionKey = versionKey(create.uid());
final long currentVersion;
VersionValue versionValue = versionMap.get(versionKey);
if (versionValue == null) {
currentVersion = loadCurrentVersionFromIndex(create.uid());
} else {
if (enableGcDeletes && versionValue.delete() && (threadPool.estimatedTimeInMillis() - versionValue.time()) > gcDeletesInMillis) {
currentVersion = Versions.NOT_FOUND; // deleted, and GC
} else {
currentVersion = versionValue.version();
}
}
// same logic as index
long updatedVersion;
long expectedVersion = create.version();
if (create.origin() == Operation.Origin.PRIMARY) {
if (create.versionType().isVersionConflict(currentVersion, expectedVersion)) {
throw new VersionConflictEngineException(shardId, create.type(), create.id(), currentVersion, expectedVersion);
}
updatedVersion = create.versionType().updateVersion(currentVersion, expectedVersion);
} else { // if (index.origin() == Operation.Origin.REPLICA || index.origin() == Operation.Origin.RECOVERY) {
// replicas treat the version as "external" as it comes from the primary ->
// only exploding if the version they got is lower or equal to what they know.
if (VersionType.EXTERNAL.isVersionConflict(currentVersion, expectedVersion)) {
if (create.origin() == Operation.Origin.RECOVERY) {
return;
} else {
throw new VersionConflictEngineException(shardId, create.type(), create.id(), currentVersion, expectedVersion);
}
}
updatedVersion = VersionType.EXTERNAL.updateVersion(currentVersion, expectedVersion);
}
// if the doc does not exists or it exists but not delete
if (versionValue != null) {
if (!versionValue.delete()) {
if (create.origin() == Operation.Origin.RECOVERY) {
return;
} else {
throw new DocumentAlreadyExistsException(shardId, create.type(), create.id());
}
}
} else if (currentVersion != Versions.NOT_FOUND) {
// its not deleted, its already there
if (create.origin() == Operation.Origin.RECOVERY) {
return;
} else {
throw new DocumentAlreadyExistsException(shardId, create.type(), create.id());
}
}
create.version(updatedVersion);
if (create.docs().size() > 1) {
writer.addDocuments(create.docs(), create.analyzer());
} else {
writer.addDocument(create.docs().get(0), create.analyzer());
}
Translog.Location translogLocation = translog.add(new Translog.Create(create));
versionMap.put(versionKey, new VersionValue(updatedVersion, false, threadPool.estimatedTimeInMillis(), translogLocation));
indexingService.postCreateUnderLock(create);
}
}
@Override
public void index(Index index) throws EngineException {
rwl.readLock().lock();
try {
IndexWriter writer = this.indexWriter;
if (writer == null) {
throw new EngineClosedException(shardId, failedEngine);
}
innerIndex(index, writer);
dirty = true;
possibleMergeNeeded = true;
flushNeeded = true;
} catch (IOException e) {
throw new IndexFailedEngineException(shardId, index, e);
} catch (OutOfMemoryError e) {
failEngine(e);
throw new IndexFailedEngineException(shardId, index, e);
} catch (IllegalStateException e) {
if (e.getMessage().contains("OutOfMemoryError")) {
failEngine(e);
}
throw new IndexFailedEngineException(shardId, index, e);
} finally {
rwl.readLock().unlock();
}
}
private void innerIndex(Index index, IndexWriter writer) throws IOException {
synchronized (dirtyLock(index.uid())) {
HashedBytesRef versionKey = versionKey(index.uid());
final long currentVersion;
VersionValue versionValue = versionMap.get(versionKey);
if (versionValue == null) {
currentVersion = loadCurrentVersionFromIndex(index.uid());
} else {
if (enableGcDeletes && versionValue.delete() && (threadPool.estimatedTimeInMillis() - versionValue.time()) > gcDeletesInMillis) {
currentVersion = Versions.NOT_FOUND; // deleted, and GC
} else {
currentVersion = versionValue.version();
}
}
long updatedVersion;
long expectedVersion = index.version();
if (index.origin() == Operation.Origin.PRIMARY) {
if (index.versionType().isVersionConflict(currentVersion, expectedVersion)) {
throw new VersionConflictEngineException(shardId, index.type(), index.id(), currentVersion, expectedVersion);
}
updatedVersion = index.versionType().updateVersion(currentVersion, expectedVersion);
} else { // if (index.origin() == Operation.Origin.REPLICA || index.origin() == Operation.Origin.RECOVERY) {
// replicas treat the version as "external" as it comes from the primary ->
// only exploding if the version they got is lower or equal to what they know.
if (VersionType.EXTERNAL.isVersionConflict(currentVersion, expectedVersion)) {
if (index.origin() == Operation.Origin.RECOVERY) {
return;
} else {
throw new VersionConflictEngineException(shardId, index.type(), index.id(), currentVersion, expectedVersion);
}
}
updatedVersion = VersionType.EXTERNAL.updateVersion(currentVersion, expectedVersion);
}
index.version(updatedVersion);
if (currentVersion == Versions.NOT_FOUND) {
// document does not exists, we can optimize for create
index.created(true);
if (index.docs().size() > 1) {
writer.addDocuments(index.docs(), index.analyzer());
} else {
writer.addDocument(index.docs().get(0), index.analyzer());
}
} else {
if (versionValue != null) {
index.created(versionValue.delete()); // we have a delete which is not GC'ed...
}
if (index.docs().size() > 1) {
writer.updateDocuments(index.uid(), index.docs(), index.analyzer());
} else {
writer.updateDocument(index.uid(), index.docs().get(0), index.analyzer());
}
}
Translog.Location translogLocation = translog.add(new Translog.Index(index));
versionMap.put(versionKey, new VersionValue(updatedVersion, false, threadPool.estimatedTimeInMillis(), translogLocation));
indexingService.postIndexUnderLock(index);
}
}
@Override
public void delete(Delete delete) throws EngineException {
rwl.readLock().lock();
try {
IndexWriter writer = this.indexWriter;
if (writer == null) {
throw new EngineClosedException(shardId, failedEngine);
}
innerDelete(delete, writer);
dirty = true;
possibleMergeNeeded = true;
flushNeeded = true;
} catch (IOException e) {
throw new DeleteFailedEngineException(shardId, delete, e);
} catch (OutOfMemoryError e) {
failEngine(e);
throw new DeleteFailedEngineException(shardId, delete, e);
} catch (IllegalStateException e) {
if (e.getMessage().contains("OutOfMemoryError")) {
failEngine(e);
}
throw new DeleteFailedEngineException(shardId, delete, e);
} finally {
rwl.readLock().unlock();
}
}
private void innerDelete(Delete delete, IndexWriter writer) throws IOException {
synchronized (dirtyLock(delete.uid())) {
final long currentVersion;
HashedBytesRef versionKey = versionKey(delete.uid());
VersionValue versionValue = versionMap.get(versionKey);
if (versionValue == null) {
currentVersion = loadCurrentVersionFromIndex(delete.uid());
} else {
if (enableGcDeletes && versionValue.delete() && (threadPool.estimatedTimeInMillis() - versionValue.time()) > gcDeletesInMillis) {
currentVersion = Versions.NOT_FOUND; // deleted, and GC
} else {
currentVersion = versionValue.version();
}
}
long updatedVersion;
long expectedVersion = delete.version();
if (delete.origin() == Operation.Origin.PRIMARY) {
if (delete.versionType().isVersionConflict(currentVersion, expectedVersion)) {
throw new VersionConflictEngineException(shardId, delete.type(), delete.id(), currentVersion, expectedVersion);
}
updatedVersion = delete.versionType().updateVersion(currentVersion, expectedVersion);
} else { // if (index.origin() == Operation.Origin.REPLICA || index.origin() == Operation.Origin.RECOVERY) {
// replicas treat the version as "external" as it comes from the primary ->
// only exploding if the version they got is lower or equal to what they know.
if (VersionType.EXTERNAL.isVersionConflict(currentVersion, expectedVersion)) {
if (delete.origin() == Operation.Origin.RECOVERY) {
return;
} else {
throw new VersionConflictEngineException(shardId, delete.type(), delete.id(), currentVersion - 1, expectedVersion);
}
}
updatedVersion = VersionType.EXTERNAL.updateVersion(currentVersion, expectedVersion);
}
if (currentVersion == Versions.NOT_FOUND) {
// doc does not exists and no prior deletes
delete.version(updatedVersion).found(false);
Translog.Location translogLocation = translog.add(new Translog.Delete(delete));
versionMap.put(versionKey, new VersionValue(updatedVersion, true, threadPool.estimatedTimeInMillis(), translogLocation));
} else if (versionValue != null && versionValue.delete()) {
// a "delete on delete", in this case, we still increment the version, log it, and return that version
delete.version(updatedVersion).found(false);
Translog.Location translogLocation = translog.add(new Translog.Delete(delete));
versionMap.put(versionKey, new VersionValue(updatedVersion, true, threadPool.estimatedTimeInMillis(), translogLocation));
} else {
delete.version(updatedVersion).found(true);
writer.deleteDocuments(delete.uid());
Translog.Location translogLocation = translog.add(new Translog.Delete(delete));
versionMap.put(versionKey, new VersionValue(updatedVersion, true, threadPool.estimatedTimeInMillis(), translogLocation));
}
indexingService.postDeleteUnderLock(delete);
}
}
@Override
public void delete(DeleteByQuery delete) throws EngineException {
rwl.readLock().lock();
try {
IndexWriter writer = this.indexWriter;
if (writer == null) {
throw new EngineClosedException(shardId);
}
Query query;
if (delete.nested() && delete.aliasFilter() != null) {
query = new IncludeNestedDocsQuery(new XFilteredQuery(delete.query(), delete.aliasFilter()), delete.parentFilter());
} else if (delete.nested()) {
query = new IncludeNestedDocsQuery(delete.query(), delete.parentFilter());
} else if (delete.aliasFilter() != null) {
query = new XFilteredQuery(delete.query(), delete.aliasFilter());
} else {
query = delete.query();
}
writer.deleteDocuments(query);
translog.add(new Translog.DeleteByQuery(delete));
dirty = true;
possibleMergeNeeded = true;
flushNeeded = true;
} catch (IOException e) {
throw new DeleteByQueryFailedEngineException(shardId, delete, e);
} finally {
rwl.readLock().unlock();
}
//TODO: This is heavy, since we refresh, but we really have to...
refreshVersioningTable(System.currentTimeMillis());
}
@Override
public final Searcher acquireSearcher(String source) throws EngineException {
SearcherManager manager = this.searcherManager;
if (manager == null) {
throw new EngineClosedException(shardId);
}
try {
IndexSearcher searcher = manager.acquire();
return newSearcher(source, searcher, manager);
} catch (Throwable ex) {
logger.error("failed to acquire searcher, source {}", ex, source);
throw new EngineException(shardId, ex.getMessage());
}
}
protected Searcher newSearcher(String source, IndexSearcher searcher, SearcherManager manager) {
return new EngineSearcher(source, searcher, manager);
}
@Override
public boolean refreshNeeded() {
return dirty;
}
@Override
public boolean possibleMergeNeeded() {
return this.possibleMergeNeeded;
}
@Override
public void refresh(Refresh refresh) throws EngineException {
if (indexWriter == null) {
throw new EngineClosedException(shardId);
}
// we obtain a read lock here, since we don't want a flush to happen while we are refreshing
// since it flushes the index as well (though, in terms of concurrency, we are allowed to do it)
rwl.readLock().lock();
try {
// this engine always acts as if waitForOperations=true
IndexWriter currentWriter = indexWriter;
if (currentWriter == null) {
throw new EngineClosedException(shardId, failedEngine);
}
try {
// maybeRefresh will only allow one refresh to execute, and the rest will "pass through",
// but, we want to make sure not to loose ant refresh calls, if one is taking time
synchronized (refreshMutex) {
if (dirty || refresh.force()) {
dirty = false;
searcherManager.maybeRefresh();
}
}
} catch (AlreadyClosedException e) {
// an index writer got replaced on us, ignore
} catch (OutOfMemoryError e) {
failEngine(e);
throw new RefreshFailedEngineException(shardId, e);
} catch (IllegalStateException e) {
if (e.getMessage().contains("OutOfMemoryError")) {
failEngine(e);
}
throw new RefreshFailedEngineException(shardId, e);
} catch (Throwable e) {
if (indexWriter == null) {
throw new EngineClosedException(shardId, failedEngine);
} else if (currentWriter != indexWriter) {
// an index writer got replaced on us, ignore
} else {
throw new RefreshFailedEngineException(shardId, e);
}
}
} finally {
rwl.readLock().unlock();
}
}
@Override
public void flush(Flush flush) throws EngineException {
ensureOpen();
if (flush.type() == Flush.Type.NEW_WRITER || flush.type() == Flush.Type.COMMIT_TRANSLOG) {
// check outside the lock as well so we can check without blocking on the write lock
if (onGoingRecoveries.get() > 0) {
throw new FlushNotAllowedEngineException(shardId, "recovery is in progress, flush [" + flush.type() + "] is not allowed");
}
}
int currentFlushing = flushing.incrementAndGet();
if (currentFlushing > 1 && !flush.waitIfOngoing()) {
flushing.decrementAndGet();
throw new FlushNotAllowedEngineException(shardId, "already flushing...");
}
flushLock.lock();
try {
if (flush.type() == Flush.Type.NEW_WRITER) {
rwl.writeLock().lock();
try {
ensureOpen();
if (onGoingRecoveries.get() > 0) {
throw new FlushNotAllowedEngineException(shardId, "Recovery is in progress, flush is not allowed");
}
// disable refreshing, not dirty
dirty = false;
try {
// that's ok if the index writer failed and is in inconsistent state
// we will get an exception on a dirty operation, and will cause the shard
// to be allocated to a different node
indexWriter.close(false);
indexWriter = createWriter();
// commit on a just opened writer will commit even if there are no changes done to it
// we rely on that for the commit data translog id key
if (flushNeeded || flush.force()) {
flushNeeded = false;
long translogId = translogIdGenerator.incrementAndGet();
indexWriter.setCommitData(MapBuilder.newMapBuilder().put(Translog.TRANSLOG_ID_KEY, Long.toString(translogId)).map());
indexWriter.commit();
translog.newTranslog(translogId);
}
SearcherManager current = this.searcherManager;
this.searcherManager = buildSearchManager(indexWriter);
try {
IOUtils.close(current);
} catch (Throwable t) {
logger.warn("Failed to close current SearcherManager", t);
}
refreshVersioningTable(threadPool.estimatedTimeInMillis());
} catch (OutOfMemoryError e) {
failEngine(e);
throw new FlushFailedEngineException(shardId, e);
} catch (IllegalStateException e) {
if (e.getMessage().contains("OutOfMemoryError")) {
failEngine(e);
}
throw new FlushFailedEngineException(shardId, e);
} catch (Throwable e) {
throw new FlushFailedEngineException(shardId, e);
}
} finally {
rwl.writeLock().unlock();
}
} else if (flush.type() == Flush.Type.COMMIT_TRANSLOG) {
rwl.readLock().lock();
try {
ensureOpen();
if (onGoingRecoveries.get() > 0) {
throw new FlushNotAllowedEngineException(shardId, "Recovery is in progress, flush is not allowed");
}
if (flushNeeded || flush.force()) {
flushNeeded = false;
try {
long translogId = translogIdGenerator.incrementAndGet();
translog.newTransientTranslog(translogId);
indexWriter.setCommitData(MapBuilder.newMapBuilder().put(Translog.TRANSLOG_ID_KEY, Long.toString(translogId)).map());
indexWriter.commit();
refreshVersioningTable(threadPool.estimatedTimeInMillis());
// we need to move transient to current only after we refresh
// so items added to current will still be around for realtime get
// when tans overrides it
translog.makeTransientCurrent();
} catch (OutOfMemoryError e) {
translog.revertTransient();
failEngine(e);
throw new FlushFailedEngineException(shardId, e);
} catch (IllegalStateException e) {
if (e.getMessage().contains("OutOfMemoryError")) {
failEngine(e);
}
throw new FlushFailedEngineException(shardId, e);
} catch (Throwable e) {
translog.revertTransient();
throw new FlushFailedEngineException(shardId, e);
}
}
} finally {
rwl.readLock().unlock();
}
} else if (flush.type() == Flush.Type.COMMIT) {
// note, its ok to just commit without cleaning the translog, its perfectly fine to replay a
// translog on an index that was opened on a committed point in time that is "in the future"
// of that translog
rwl.readLock().lock();
try {
ensureOpen();
// we allow to *just* commit if there is an ongoing recovery happening...
// its ok to use this, only a flush will cause a new translogId, and we are locked here from
// other flushes use flushLock
try {
long translogId = translog.currentId();
indexWriter.setCommitData(MapBuilder.newMapBuilder().put(Translog.TRANSLOG_ID_KEY, Long.toString(translogId)).map());
indexWriter.commit();
} catch (OutOfMemoryError e) {
translog.revertTransient();
failEngine(e);
throw new FlushFailedEngineException(shardId, e);
} catch (IllegalStateException e) {
if (e.getMessage().contains("OutOfMemoryError")) {
failEngine(e);
}
throw new FlushFailedEngineException(shardId, e);
} catch (Throwable e) {
throw new FlushFailedEngineException(shardId, e);
}
} finally {
rwl.readLock().unlock();
}
} else {
throw new ElasticsearchIllegalStateException("flush type [" + flush.type() + "] not supported");
}
// reread the last committed segment infos
rwl.readLock().lock();
try {
ensureOpen();
readLastCommittedSegmentsInfo();
} catch (Throwable e) {
if (!closed) {
logger.warn("failed to read latest segment infos on flush", e);
}
} finally {
rwl.readLock().unlock();
}
} finally {
flushLock.unlock();
flushing.decrementAndGet();
}
}
private void ensureOpen() {
if (indexWriter == null) {
throw new EngineClosedException(shardId, failedEngine);
}
}
private void refreshVersioningTable(long time) {
// we need to refresh in order to clear older version values
refresh(new Refresh("version_table").force(true));
for (Map.Entry entry : versionMap.entrySet()) {
HashedBytesRef uid = entry.getKey();
synchronized (dirtyLock(uid.bytes)) { // can we do it without this lock on each value? maybe batch to a set and get the lock once per set?
VersionValue versionValue = versionMap.get(uid);
if (versionValue == null) {
continue;
}
if (time - versionValue.time() <= 0) {
continue; // its a newer value, from after/during we refreshed, don't clear it
}
if (versionValue.delete()) {
if (enableGcDeletes && (time - versionValue.time()) > gcDeletesInMillis) {
versionMap.remove(uid);
}
} else {
versionMap.remove(uid);
}
}
}
}
@Override
public void maybeMerge() throws EngineException {
if (!possibleMergeNeeded) {
return;
}
possibleMergeNeeded = false;
rwl.readLock().lock();
try {
ensureOpen();
indexWriter.maybeMerge();
} catch (OutOfMemoryError e) {
failEngine(e);
throw new OptimizeFailedEngineException(shardId, e);
} catch (IllegalStateException e) {
if (e.getMessage().contains("OutOfMemoryError")) {
failEngine(e);
}
throw new OptimizeFailedEngineException(shardId, e);
} catch (Throwable e) {
throw new OptimizeFailedEngineException(shardId, e);
} finally {
rwl.readLock().unlock();
}
}
@Override
public void optimize(Optimize optimize) throws EngineException {
if (optimize.flush()) {
flush(new Flush().force(true).waitIfOngoing(true));
}
if (optimizeMutex.compareAndSet(false, true)) {
rwl.readLock().lock();
try {
ensureOpen();
if (optimize.onlyExpungeDeletes()) {
indexWriter.forceMergeDeletes(false);
} else if (optimize.maxNumSegments() <= 0) {
indexWriter.maybeMerge();
possibleMergeNeeded = false;
} else {
indexWriter.forceMerge(optimize.maxNumSegments(), false);
}
} catch (OutOfMemoryError e) {
failEngine(e);
throw new OptimizeFailedEngineException(shardId, e);
} catch (IllegalStateException e) {
if (e.getMessage().contains("OutOfMemoryError")) {
failEngine(e);
}
throw new OptimizeFailedEngineException(shardId, e);
} catch (Throwable e) {
throw new OptimizeFailedEngineException(shardId, e);
} finally {
rwl.readLock().unlock();
optimizeMutex.set(false);
}
}
// wait for the merges outside of the read lock
if (optimize.waitForMerge()) {
indexWriter.waitForMerges();
}
if (optimize.flush()) {
flush(new Flush().force(true).waitIfOngoing(true));
}
}
@Override
public T snapshot(SnapshotHandler snapshotHandler) throws EngineException {
SnapshotIndexCommit snapshotIndexCommit = null;
Translog.Snapshot traslogSnapshot = null;
rwl.readLock().lock();
try {
snapshotIndexCommit = deletionPolicy.snapshot();
traslogSnapshot = translog.snapshot();
} catch (Throwable e) {
if (snapshotIndexCommit != null) {
snapshotIndexCommit.release();
}
throw new SnapshotFailedEngineException(shardId, e);
} finally {
rwl.readLock().unlock();
}
try {
return snapshotHandler.snapshot(snapshotIndexCommit, traslogSnapshot);
} finally {
snapshotIndexCommit.release();
traslogSnapshot.release();
}
}
@Override
public SnapshotIndexCommit snapshotIndex() throws EngineException {
rwl.readLock().lock();
try {
flush(new Flush().type(Flush.Type.COMMIT).waitIfOngoing(true));
ensureOpen();
return deletionPolicy.snapshot();
} catch (IOException e) {
throw new SnapshotFailedEngineException(shardId, e);
} finally {
rwl.readLock().unlock();
}
}
@Override
public void recover(RecoveryHandler recoveryHandler) throws EngineException {
// take a write lock here so it won't happen while a flush is in progress
// this means that next commits will not be allowed once the lock is released
rwl.writeLock().lock();
try {
if (closed) {
throw new EngineClosedException(shardId);
}
onGoingRecoveries.increment();
} finally {
rwl.writeLock().unlock();
}
SnapshotIndexCommit phase1Snapshot;
try {
phase1Snapshot = deletionPolicy.snapshot();
} catch (Throwable e) {
onGoingRecoveries.decrement();
throw new RecoveryEngineException(shardId, 1, "Snapshot failed", e);
}
try {
recoveryHandler.phase1(phase1Snapshot);
} catch (Throwable e) {
onGoingRecoveries.decrement();
phase1Snapshot.release();
if (closed) {
e = new EngineClosedException(shardId, e);
}
throw new RecoveryEngineException(shardId, 1, "Execution failed", e);
}
Translog.Snapshot phase2Snapshot;
try {
phase2Snapshot = translog.snapshot();
} catch (Throwable e) {
onGoingRecoveries.decrement();
phase1Snapshot.release();
if (closed) {
e = new EngineClosedException(shardId, e);
}
throw new RecoveryEngineException(shardId, 2, "Snapshot failed", e);
}
try {
recoveryHandler.phase2(phase2Snapshot);
} catch (Throwable e) {
onGoingRecoveries.decrement();
phase1Snapshot.release();
phase2Snapshot.release();
if (closed) {
e = new EngineClosedException(shardId, e);
}
throw new RecoveryEngineException(shardId, 2, "Execution failed", e);
}
rwl.writeLock().lock();
Translog.Snapshot phase3Snapshot = null;
try {
phase3Snapshot = translog.snapshot(phase2Snapshot);
recoveryHandler.phase3(phase3Snapshot);
} catch (Throwable e) {
throw new RecoveryEngineException(shardId, 3, "Execution failed", e);
} finally {
onGoingRecoveries.decrement();
rwl.writeLock().unlock();
phase1Snapshot.release();
phase2Snapshot.release();
if (phase3Snapshot != null) {
phase3Snapshot.release();
}
}
}
/*this is only used by one test right now and shoudl go away entirely once we update lucene*/
private static boolean allowRamBytesUsed = false;
static {
assert Version.CURRENT.luceneVersion == org.apache.lucene.util.Version.LUCENE_46 :
"when upgrading to a new lucene version, check if ramBytes is fixed, see https://issues.apache.org/jira/browse/LUCENE-5373";
}
private long getReaderRamBytesUsed(AtomicReaderContext reader) {
return allowRamBytesUsed ? SegmentReaderUtils.segmentReader(reader.reader()).ramBytesUsed() : 0;
}
@Override
public SegmentsStats segmentsStats() {
rwl.readLock().lock();
try {
ensureOpen();
Searcher searcher = acquireSearcher("segments_stats");
try {
SegmentsStats stats = new SegmentsStats();
for (AtomicReaderContext reader : searcher.reader().leaves()) {
stats.add(1, getReaderRamBytesUsed(reader));
}
return stats;
} finally {
searcher.release();
}
} finally {
rwl.readLock().unlock();
}
}
@Override
public List segments() {
rwl.readLock().lock();
try {
ensureOpen();
Map segments = new HashMap();
// first, go over and compute the search ones...
Searcher searcher = acquireSearcher("segments");
try {
for (AtomicReaderContext reader : searcher.reader().leaves()) {
assert reader.reader() instanceof SegmentReader;
SegmentCommitInfo info = SegmentReaderUtils.segmentReader(reader.reader()).getSegmentInfo();
assert !segments.containsKey(info.info.name);
Segment segment = new Segment(info.info.name);
segment.search = true;
segment.docCount = reader.reader().numDocs();
segment.delDocCount = reader.reader().numDeletedDocs();
segment.version = info.info.getVersion();
segment.compound = info.info.getUseCompoundFile();
try {
segment.sizeInBytes = info.sizeInBytes();
} catch (IOException e) {
logger.trace("failed to get size for [{}]", e, info.info.name);
}
segment.memoryInBytes = getReaderRamBytesUsed(reader);
segments.put(info.info.name, segment);
}
} finally {
searcher.release();
}
// now, correlate or add the committed ones...
if (lastCommittedSegmentInfos != null) {
SegmentInfos infos = lastCommittedSegmentInfos;
for (SegmentCommitInfo info : infos) {
Segment segment = segments.get(info.info.name);
if (segment == null) {
segment = new Segment(info.info.name);
segment.search = false;
segment.committed = true;
segment.docCount = info.info.getDocCount();
segment.delDocCount = info.getDelCount();
segment.version = info.info.getVersion();
segment.compound = info.info.getUseCompoundFile();
try {
segment.sizeInBytes = info.sizeInBytes();
} catch (IOException e) {
logger.trace("failed to get size for [{}]", e, info.info.name);
}
segments.put(info.info.name, segment);
} else {
segment.committed = true;
}
}
}
Segment[] segmentsArr = segments.values().toArray(new Segment[segments.values().size()]);
Arrays.sort(segmentsArr, new Comparator() {
@Override
public int compare(Segment o1, Segment o2) {
return (int) (o1.getGeneration() - o2.getGeneration());
}
});
// fill in the merges flag
Set onGoingMerges = mergeScheduler.onGoingMerges();
for (OnGoingMerge onGoingMerge : onGoingMerges) {
for (SegmentCommitInfo segmentInfoPerCommit : onGoingMerge.getMergedSegments()) {
for (Segment segment : segmentsArr) {
if (segment.getName().equals(segmentInfoPerCommit.info.name)) {
segment.mergeId = onGoingMerge.getId();
break;
}
}
}
}
return Arrays.asList(segmentsArr);
} finally {
rwl.readLock().unlock();
}
}
@Override
public void close() throws ElasticsearchException {
rwl.writeLock().lock();
try {
innerClose();
} finally {
rwl.writeLock().unlock();
}
try {
// wait for recoveries to join and close all resources / IO streams
int ongoingRecoveries = onGoingRecoveries.awaitNoRecoveries(5000);
if (ongoingRecoveries > 0) {
logger.debug("Waiting for ongoing recoveries timed out on close currently ongoing disoveries: [{}]", ongoingRecoveries);
}
} catch (InterruptedException e) {
// ignore & restore interrupt
Thread.currentThread().interrupt();
}
}
class FailEngineOnMergeFailure implements MergeSchedulerProvider.FailureListener {
@Override
public void onFailedMerge(MergePolicy.MergeException e) {
failEngine(e);
}
}
private void failEngine(Throwable failure) {
synchronized (failedEngineMutex) {
if (failedEngine != null) {
return;
}
logger.warn("failed engine", failure);
failedEngine = failure;
for (FailedEngineListener listener : failedEngineListeners) {
listener.onFailedEngine(shardId, failure);
}
innerClose();
}
}
private void innerClose() {
if (closed) {
return;
}
indexSettingsService.removeListener(applySettings);
closed = true;
this.versionMap.clear();
this.failedEngineListeners.clear();
try {
try {
IOUtils.close(searcherManager);
} catch (Throwable t) {
logger.warn("Failed to close SearcherManager", t);
}
// no need to commit in this case!, we snapshot before we close the shard, so translog and all sync'ed
if (indexWriter != null) {
try {
indexWriter.rollback();
} catch (AlreadyClosedException e) {
// ignore
}
}
} catch (Throwable e) {
logger.debug("failed to rollback writer on close", e);
} finally {
indexWriter = null;
}
}
private HashedBytesRef versionKey(Term uid) {
return new HashedBytesRef(uid.bytes());
}
private Object dirtyLock(BytesRef uid) {
int hash = DjbHashFunction.DJB_HASH(uid.bytes, uid.offset, uid.length);
// abs returns Integer.MIN_VALUE, so we need to protect against it...
if (hash == Integer.MIN_VALUE) {
hash = 0;
}
return dirtyLocks[Math.abs(hash) % dirtyLocks.length];
}
private Object dirtyLock(Term uid) {
return dirtyLock(uid.bytes());
}
private long loadCurrentVersionFromIndex(Term uid) throws IOException {
Searcher searcher = acquireSearcher("load_version");
try {
return Versions.loadVersion(searcher.reader(), uid);
} finally {
searcher.release();
}
}
/**
* Returns whether a leaf reader comes from a merge (versus flush or addIndexes).
*/
private static boolean isMergedSegment(AtomicReader reader) {
// We expect leaves to be segment readers
final Map diagnostics = SegmentReaderUtils.segmentReader(reader).getSegmentInfo().info.getDiagnostics();
final String source = diagnostics.get(IndexWriter.SOURCE);
assert Arrays.asList(IndexWriter.SOURCE_ADDINDEXES_READERS, IndexWriter.SOURCE_FLUSH, IndexWriter.SOURCE_MERGE).contains(source) : "Unknown source " + source;
return IndexWriter.SOURCE_MERGE.equals(source);
}
private IndexWriter createWriter() throws IOException {
try {
// release locks when started
if (IndexWriter.isLocked(store.directory())) {
logger.warn("shard is locked, releasing lock");
IndexWriter.unlock(store.directory());
}
boolean create = !Lucene.indexExists(store.directory());
IndexWriterConfig config = new IndexWriterConfig(Lucene.VERSION, analysisService.defaultIndexAnalyzer());
config.setOpenMode(create ? IndexWriterConfig.OpenMode.CREATE : IndexWriterConfig.OpenMode.APPEND);
config.setIndexDeletionPolicy(deletionPolicy);
config.setMergeScheduler(mergeScheduler.newMergeScheduler());
MergePolicy mergePolicy = mergePolicyProvider.newMergePolicy();
// Give us the opportunity to upgrade old segments while performing
// background merges
mergePolicy = new IndexUpgraderMergePolicy(mergePolicy);
config.setMergePolicy(mergePolicy);
config.setSimilarity(similarityService.similarity());
config.setRAMBufferSizeMB(indexingBufferSize.mbFrac());
config.setMaxThreadStates(indexConcurrency);
config.setCodec(codecService.codec(codecName));
/* We set this timeout to a highish value to work around
* the default poll interval in the Lucene lock that is
* 1000ms by default. We might need to poll multiple times
* here but with 1s poll this is only executed twice at most
* in combination with the default writelock timeout*/
config.setWriteLockTimeout(5000);
config.setUseCompoundFile(this.compoundOnFlush);
// Warm-up hook for newly-merged segments. Warming up segments here is better since it will be performed at the end
// of the merge operation and won't slow down _refresh
config.setMergedSegmentWarmer(new IndexReaderWarmer() {
@Override
public void warm(AtomicReader reader) throws IOException {
try {
assert isMergedSegment(reader);
final Engine.Searcher searcher = new SimpleSearcher("warmer", new IndexSearcher(reader));
final IndicesWarmer.WarmerContext context = new IndicesWarmer.WarmerContext(shardId, searcher);
if (warmer != null) warmer.warm(context);
} catch (Throwable t) {
// Don't fail a merge if the warm-up failed
if (!closed) {
logger.warn("Warm-up failed", t);
}
if (t instanceof Error) {
// assertion/out-of-memory error, don't ignore those
throw (Error) t;
}
}
}
});
return new IndexWriter(store.directory(), config);
} catch (LockObtainFailedException ex) {
boolean isLocked = IndexWriter.isLocked(store.directory());
logger.warn("Could not lock IndexWriter isLocked [{}]", ex, isLocked);
throw ex;
}
}
public static final String INDEX_INDEX_CONCURRENCY = "index.index_concurrency";
public static final String INDEX_COMPOUND_ON_FLUSH = "index.compound_on_flush";
public static final String INDEX_GC_DELETES = "index.gc_deletes";
public static final String INDEX_FAIL_ON_MERGE_FAILURE = "index.fail_on_merge_failure";
class ApplySettings implements IndexSettingsService.Listener {
@Override
public void onRefreshSettings(Settings settings) {
long gcDeletesInMillis = settings.getAsTime(INDEX_GC_DELETES, TimeValue.timeValueMillis(InternalEngine.this.gcDeletesInMillis)).millis();
if (gcDeletesInMillis != InternalEngine.this.gcDeletesInMillis) {
logger.info("updating index.gc_deletes from [{}] to [{}]", TimeValue.timeValueMillis(InternalEngine.this.gcDeletesInMillis), TimeValue.timeValueMillis(gcDeletesInMillis));
InternalEngine.this.gcDeletesInMillis = gcDeletesInMillis;
}
final boolean compoundOnFlush = settings.getAsBoolean(INDEX_COMPOUND_ON_FLUSH, InternalEngine.this.compoundOnFlush);
if (compoundOnFlush != InternalEngine.this.compoundOnFlush) {
logger.info("updating {} from [{}] to [{}]", InternalEngine.INDEX_COMPOUND_ON_FLUSH, InternalEngine.this.compoundOnFlush, compoundOnFlush);
InternalEngine.this.compoundOnFlush = compoundOnFlush;
indexWriter.getConfig().setUseCompoundFile(compoundOnFlush);
}
int indexConcurrency = settings.getAsInt(INDEX_INDEX_CONCURRENCY, InternalEngine.this.indexConcurrency);
boolean failOnMergeFailure = settings.getAsBoolean(INDEX_FAIL_ON_MERGE_FAILURE, InternalEngine.this.failOnMergeFailure);
String codecName = settings.get(INDEX_CODEC, InternalEngine.this.codecName);
final boolean codecBloomLoad = settings.getAsBoolean(CodecService.INDEX_CODEC_BLOOM_LOAD, codecService.isLoadBloomFilter());
boolean requiresFlushing = false;
if (indexConcurrency != InternalEngine.this.indexConcurrency ||
!codecName.equals(InternalEngine.this.codecName) ||
failOnMergeFailure != InternalEngine.this.failOnMergeFailure ||
codecBloomLoad != codecService.isLoadBloomFilter()) {
rwl.readLock().lock();
try {
if (indexConcurrency != InternalEngine.this.indexConcurrency) {
logger.info("updating index.index_concurrency from [{}] to [{}]", InternalEngine.this.indexConcurrency, indexConcurrency);
InternalEngine.this.indexConcurrency = indexConcurrency;
// we have to flush in this case, since it only applies on a new index writer
requiresFlushing = true;
}
if (!codecName.equals(InternalEngine.this.codecName)) {
logger.info("updating index.codec from [{}] to [{}]", InternalEngine.this.codecName, codecName);
InternalEngine.this.codecName = codecName;
// we want to flush in this case, so the new codec will be reflected right away...
requiresFlushing = true;
}
if (failOnMergeFailure != InternalEngine.this.failOnMergeFailure) {
logger.info("updating {} from [{}] to [{}]", InternalEngine.INDEX_FAIL_ON_MERGE_FAILURE, InternalEngine.this.failOnMergeFailure, failOnMergeFailure);
InternalEngine.this.failOnMergeFailure = failOnMergeFailure;
}
if (codecBloomLoad != codecService.isLoadBloomFilter()) {
logger.info("updating {} from [{}] to [{}]", CodecService.INDEX_CODEC_BLOOM_LOAD, codecService.isLoadBloomFilter(), codecBloomLoad);
codecService.setLoadBloomFilter(codecBloomLoad);
// we need to flush in this case, to load/unload the bloom filters
requiresFlushing = true;
}
} finally {
rwl.readLock().unlock();
}
if (requiresFlushing) {
flush(new Flush().type(Flush.Type.NEW_WRITER));
}
}
}
}
private SearcherManager buildSearchManager(IndexWriter indexWriter) throws IOException {
return new SearcherManager(indexWriter, true, searcherFactory);
}
static class EngineSearcher implements Searcher {
private final String source;
private final IndexSearcher searcher;
private final SearcherManager manager;
private EngineSearcher(String source, IndexSearcher searcher, SearcherManager manager) {
this.source = source;
this.searcher = searcher;
this.manager = manager;
}
@Override
public String source() {
return this.source;
}
@Override
public IndexReader reader() {
return searcher.getIndexReader();
}
@Override
public IndexSearcher searcher() {
return searcher;
}
@Override
public boolean release() throws ElasticsearchException {
try {
manager.release(searcher);
return true;
} catch (IOException e) {
return false;
} catch (AlreadyClosedException e) {
/* this one can happen if we already closed the
* underlying store / directory and we call into the
* IndexWriter to free up pending files. */
return false;
}
}
}
static class VersionValue {
private final long version;
private final boolean delete;
private final long time;
private final Translog.Location translogLocation;
VersionValue(long version, boolean delete, long time, Translog.Location translogLocation) {
this.version = version;
this.delete = delete;
this.time = time;
this.translogLocation = translogLocation;
}
public long time() {
return this.time;
}
public long version() {
return version;
}
public boolean delete() {
return delete;
}
public Translog.Location translogLocation() {
return this.translogLocation;
}
}
class SearchFactory extends SearcherFactory {
@Override
public IndexSearcher newSearcher(IndexReader reader) throws IOException {
IndexSearcher searcher = new IndexSearcher(reader);
searcher.setSimilarity(similarityService.similarity());
if (warmer != null) {
// we need to pass a custom searcher that does not release anything on Engine.Search Release,
// we will release explicitly
Searcher currentSearcher = null;
IndexSearcher newSearcher = null;
boolean closeNewSearcher = false;
try {
if (searcherManager == null) {
// fresh index writer, just do on all of it
newSearcher = searcher;
} else {
currentSearcher = acquireSearcher("search_factory");
// figure out the newSearcher, with only the new readers that are relevant for us
List readers = Lists.newArrayList();
for (AtomicReaderContext newReaderContext : searcher.getIndexReader().leaves()) {
if (isMergedSegment(newReaderContext.reader())) {
// merged segments are already handled by IndexWriterConfig.setMergedSegmentWarmer
continue;
}
boolean found = false;
for (AtomicReaderContext currentReaderContext : currentSearcher.reader().leaves()) {
if (currentReaderContext.reader().getCoreCacheKey().equals(newReaderContext.reader().getCoreCacheKey())) {
found = true;
break;
}
}
if (!found) {
readers.add(newReaderContext.reader());
}
}
if (!readers.isEmpty()) {
// we don't want to close the inner readers, just increase ref on them
newSearcher = new IndexSearcher(new MultiReader(readers.toArray(new IndexReader[readers.size()]), false));
closeNewSearcher = true;
}
}
if (newSearcher != null) {
IndicesWarmer.WarmerContext context = new IndicesWarmer.WarmerContext(shardId,
new SimpleSearcher("warmer", newSearcher));
warmer.warm(context);
}
} catch (Throwable e) {
if (!closed) {
logger.warn("failed to prepare/warm", e);
}
} finally {
// no need to release the fullSearcher, nothing really is done...
if (currentSearcher != null) {
currentSearcher.release();
}
if (newSearcher != null && closeNewSearcher) {
IOUtils.closeWhileHandlingException(newSearcher.getIndexReader()); // ignore
}
}
}
return searcher;
}
}
private static final class RecoveryCounter {
private volatile int ongoingRecoveries = 0;
synchronized void increment() {
ongoingRecoveries++;
}
synchronized void decrement() {
ongoingRecoveries--;
if (ongoingRecoveries == 0) {
notifyAll(); // notify waiting threads - we only wait on ongoingRecoveries == 0
}
assert ongoingRecoveries >= 0 : "ongoingRecoveries must be >= 0 but was: " + ongoingRecoveries;
}
int get() {
// volatile read - no sync needed
return ongoingRecoveries;
}
synchronized int awaitNoRecoveries(long timeout) throws InterruptedException {
if (ongoingRecoveries > 0) { // no loop here - we either time out or we are done!
wait(timeout);
}
return ongoingRecoveries;
}
}
}
