5
Webアプリケーション上の項目をインデックス化し、フルテキスト検索するのに、Hibernate Searchを使用します。私のpom.xmlからLucene/Hibernate Searchロック例外
：さて、本番に行く前に、私は、ApacheのJMeterを使用して自分のWebアプリケーションの検索機能をストレステストしようとした
<hibernate.search.version>3.4.2.Final</hibernate.search.version>
<apache.lucene.version>3.6.2</apache.lucene.version>
<apache.solr.version>3.6.2</apache.solr.version>
<hibernate.version>3.6.9.Final</hibernate.version>
17:11:57,670 ERROR LogErrorHandler:82 - Exception occurred org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out: [email protected]/opt/myapp/item_index/myapp.item.domain.Item/write.lock
Primary Failure:
Entity myapp.item.domain.Item Id 4 Work Type org.hibernate.search.backend.DeleteLuceneWork
org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out: [email protected]/opt/myapp/item_index/myapp.item.domain.Item/write.lock
at org.apache.lucene.store.Lock.obtain(Lock.java:84)
at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1098)
at org.hibernate.search.backend.Workspace.createNewIndexWriter(Workspace.java:202)
at org.hibernate.search.backend.Workspace.getIndexWriter(Workspace.java:180)
at org.hibernate.search.backend.impl.lucene.PerDPQueueProcessor.run(PerDPQueueProcessor.java:103)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
17:11:57,670 ERROR PerDPQueueProcessor:118 - Unexpected error in Lucene Backend:
org.hibernate.search.SearchException: Unable to remove class myapp.item.domain.Item#4 from index.
at org.hibernate.search.backend.impl.lucene.works.DeleteExtWorkDelegate.performWork(DeleteExtWorkDelegate.java:77)
at org.hibernate.search.backend.impl.lucene.PerDPQueueProcessor.run(PerDPQueueProcessor.java:106)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
at org.hibernate.search.backend.impl.lucene.works.DeleteExtWorkDelegate.performWork(DeleteExtWorkDelegate.java:72)
... 7 more
：インデックス作成後
@Override
public void createInitialIndexFromDB() {
// get session and set flush mode to manually to control the commit
FullTextSession fullTextSession = getFullTextSession();
fullTextSession.setFlushMode(FlushMode.MANUAL);
// do not add any data to the object context
fullTextSession.setCacheMode(CacheMode.IGNORE);
addResultsToIndex(fullTextSession, FETCH_ITEMS_TO_INDEX);
addResultsToIndex(fullTextSession, FETCH_DRAFTS_TO_INDEX);
addResultsToIndex(fullTextSession, FETCH_RESERVATIONS_TO_INDEX);
addResultsToIndex(fullTextSession, FETCH_SALES_TO_INDEX);
fullTextSession.flushToIndexes();
fullTextSession.clear();
}
private void addResultsToIndex(FullTextSession fullTextSession, String query) {
ScrollableResults results = fullTextSession.createQuery(query).scroll(
ScrollMode.FORWARD_ONLY);
for (int index = 1; results.next(); index++) {
fullTextSession.index(results.get(0));
if (index % BATCH_SIZE == 0 || results.isLast()) {
fullTextSession.flushToIndexes();
fullTextSession.clear();
}
}
}
private FullTextSession getFullTextSession() {
Session session = this.sessionFactory.getCurrentSession();
return Search.getFullTextSession(session);
}
私のインデックスに対するすべての変更は、カスタムFullTextIndexEventListenerを通過している：
public final class HibernateItemEventListener extends
FullTextIndexEventListener {
private static final Logger log = LoggerFactory
.getLogger(HibernateItemEventListener.class);
public HibernateItemEventListener() {
super(Installation.SINGLE_INSTANCE);
}
@Override
public void onPostInsert(PostInsertEvent event) {
log.debug("onPostInsert");
if (!isIndexed(event.getEntity()))
return;
// Without these checks the elements are added twice to the index!
if (event.getEntity() instanceof ItemReservation)
return;
if (event.getEntity() instanceof ItemSale)
return;
super.onPostInsert(event);
}
@Override
public void onPostUpdate(PostUpdateEvent event) {
log.debug("onPostUpdate - Start");
if (!isIndexed(event.getEntity()))
return;
Serializable id = event.getId();
log.debug("onPostUpdate - Need update for id " + id);
if (used) {
boolean identifierRollbackEnabled = event.getSession().getFactory()
.getSettings().isIdentifierRollbackEnabled();
final Object entity = event.getEntity();
if (searchFactoryImplementor.getDocumentBuilderIndexedEntity(entity
.getClass()) != null
|| searchFactoryImplementor
.getDocumentBuilderContainedEntity(entity
.getClass()) != null) {
// Remove item
if (entity instanceof Item) {
Item item = (Item) entity;
if (item.getQuantity() < 1) {
processWork(entity, id, WorkType.PURGE, event,
identifierRollbackEnabled);
return;
}
}
// Remove reservation
if (entity instanceof ItemReservation) {
ItemReservation ir = (ItemReservation) entity;
if (ir.getActive() < 1) {
processWork(entity, id, WorkType.PURGE, event,
identifierRollbackEnabled);
return;
}
}
// Update entity
processWork(entity, id, WorkType.UPDATE, event,
identifierRollbackEnabled);
} else {
// Add entity
processWork(entity, id, WorkType.ADD, event,
identifierRollbackEnabled);
}
}
}
@Override
public void onPostDelete(PostDeleteEvent event) {
log.debug("onPostDelete - Start");
if (!isIndexed(event.getEntity()))
return;
log.debug("onPostDelete - Need delete for id " + event.getId());
super.onPostDelete(event);
}
private boolean isIndexed(Object entity) {
return entity instanceof Item || entity instanceof Draft
|| entity instanceof ItemReservation
|| entity instanceof ItemSale;
}
}
例外は、上記（検索が行うWOアプリケーション自体には影響を与えません。 RK）が、それは時々私は）ロックの問題と関連していると仮定し、他の多くの重要な例外（につながる：
17:11:58,866 ERROR LogErrorHandler:82 - Exception occurred java.io.FileNotFoundException: _iz.fdx
java.io.FileNotFoundException: _iz.fdx
at org.apache.lucene.store.FSDirectory.fileLength(FSDirectory.java:284)
at org.apache.lucene.index.SegmentInfo.sizeInBytes(SegmentInfo.java:303)
at org.apache.lucene.index.LogMergePolicy.sizeBytes(LogMergePolicy.java:193)
at org.apache.lucene.index.LogByteSizeMergePolicy.size(LogByteSizeMergePolicy.java:45)
at org.apache.lucene.index.LogMergePolicy.useCompoundFile(LogMergePolicy.java:147)
at org.apache.lucene.index.DocumentsWriter.flush(DocumentsWriter.java:593)
at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3587)
at org.apache.lucene.index.IndexWriter.prepareCommit(IndexWriter.java:3376)
at org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:3485)
at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:3467)
at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:3451)
at org.hibernate.search.backend.Workspace.commitIndexWriter(Workspace.java:220)
at org.hibernate.search.backend.impl.lucene.PerDPQueueProcessor.run(PerDPQueueProcessor.java:109)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
17:11:59,991 ERROR LogErrorHandler:82 - Exception occurred java.io.FileNotFoundException: /opt/myapp/item_index/myapp.item.domain.Item/_iz.cfs (No such file or directory)
任意のヒントを？
EDIT：ライブラリーの調整とJMeterの攻撃性の増加（複数のスレッド）の後 例外とインデックス破損がまだ表示されます。
12:08:11,163 ERROR LogErrorHandler:82 - Exception occurred java.io.FileNotFoundException: /opt/myapp/item_index/myapp.item.domain.Item/_8gy.cfs (No such file or directory)
Primary Failure:
Entity myapp.item.domain.Item Id 596 Work Type org.hibernate.search.backend.DeleteLuceneWork
Subsequent failures:
Entity myapp.item.domain.Item Id 596 Work Type org.hibernate.search.backend.AddLuceneWork
Entity myapp.item.domain.Item Id 734 Work Type org.hibernate.search.backend.DeleteLuceneWork
Entity myapp.item.domain.Item Id 734 Work Type org.hibernate.search.backend.AddLuceneWork
Entity myapp.item.domain.Item Id 599 Work Type org.hibernate.search.backend.DeleteLuceneWork
Entity myapp.item.domain.Item Id 599 Work Type org.hibernate.search.backend.AddLuceneWork
Entity myapp.item.domain.Item Id 735 Work Type org.hibernate.search.backend.DeleteLuceneWork
Entity myapp.item.domain.Item Id 735 Work Type org.hibernate.search.backend.AddLuceneWork
Entity myapp.item.domain.Item Id 598 Work Type org.hibernate.search.backend.DeleteLuceneWork
Entity myapp.item.domain.Item Id 598 Work Type org.hibernate.search.backend.AddLuceneWork
Entity myapp.item.domain.Item Id 720 Work Type org.hibernate.search.backend.DeleteLuceneWork
Entity myapp.item.domain.Item Id 720 Work Type org.hibernate.search.backend.AddLuceneWork
java.io.FileNotFoundException: /opt/myapp/item_index/myapp.item.domain.Item/_8gy.cfs (No such file or directory)
at java.io.RandomAccessFile.open(Native Method)
at java.io.RandomAccessFile.<init>(RandomAccessFile.java:216)
at org.apache.lucene.store.SimpleFSDirectory$SimpleFSIndexInput$Descriptor.<init>(SimpleFSDirectory.java:69)
at org.apache.lucene.store.SimpleFSDirectory$SimpleFSIndexInput.<init>(SimpleFSDirectory.java:90)
at org.apache.lucene.store.NIOFSDirectory$NIOFSIndexInput.<init>(NIOFSDirectory.java:91)
at org.apache.lucene.store.NIOFSDirectory.openInput(NIOFSDirectory.java:78)
at org.apache.lucene.index.CompoundFileReader.<init>(CompoundFileReader.java:66)
at org.apache.lucene.index.CompoundFileReader.<init>(CompoundFileReader.java:55)
at org.apache.lucene.index.IndexWriter.getFieldInfos(IndexWriter.java:1193)
at org.apache.lucene.index.IndexWriter.getCurrentFieldInfos(IndexWriter.java:1213)
at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1149)
at org.hibernate.search.backend.Workspace.createNewIndexWriter(Workspace.java:202)
at org.hibernate.search.backend.Workspace.getIndexWriter(Workspace.java:180)
at org.hibernate.search.backend.impl.lucene.PerDPQueueProcessor.run(PerDPQueueProcessor.java:103)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
12:08:11,163 ERROR PerDPQueueProcessor:118 - Unexpected error in Lucene Backend:
org.hibernate.search.SearchException: Unable to remove class myapp.item.domain.Item#596 from index.
at org.hibernate.search.backend.impl.lucene.works.DeleteExtWorkDelegate.performWork(DeleteExtWorkDelegate.java:77)
at org.hibernate.search.backend.impl.lucene.PerDPQueueProcessor.run(PerDPQueueProcessor.java:106)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
EDITをデバッグした後： するFileNotFound（したがって、IndexWriter NPE）を生成Workspace.createNewIndexWriter（）メソッドの
IndexWriter writer = new IndexWriter(directoryProvider.getDirectory(), writerConfig);
にあります。 Hibernateの検索は非常にLuceneのAPIの変更に連結されている
writerConfig:
matchVersion=LUCENE_31
analyzer=org.apache.lucene.analysis.SimpleAnalyzer
delPolicy=org.apache.lucene.index.KeepOnlyLastCommitDeletionPolicy
commit=null
openMode=CREATE_OR_APPEND
similarity=org.apache.lucene.search.DefaultSimilarity
termIndexInterval=128
mergeScheduler=org.hibernate.search.backend.impl.lucene.overrides.ConcurrentMergeScheduler
default WRITE_LOCK_TIMEOUT=1000
writeLockTimeout=1000
maxBufferedDeleteTerms=-1
ramBufferSizeMB=16.0
maxBufferedDocs=-1
mergedSegmentWarmer=null
mergePolicy=[LogByteSizeMergePolicy: minMergeSize=1677721, mergeFactor=10, maxMergeSize=2147483648, maxMergeSizeForOptimize=9223372036854775807, calibrateSizeByDeletes=true, maxMergeDocs=2147483647, useCompoundFile=true]
maxThreadStates=8
readerPooling=false
readerTermsIndexDivisor=1
インデックスはどのようなファイルシステムに保存されていますか？それは信頼できるのですか？また、カスタムFullTextIndexEventListenerの間違いが疑われるNullPointerExceptionがあります。このカスタムリスナーが必要なものを要約できますか？ – Sanne
私はxubuntuとCentOSでext4ファイルシステムを使用しています（2つの異なるシステムで試しました）。インデックスファイルはTomcatと同じサーバー上にあり、ファイルのアクセス権は正しく割り当てられています。カスタムリスナーを使用して、索引から（つまり検索結果から）使用不可能な項目（量<1）が削除されますが、それらはデータベースに保持されます。リスナーのコードに何か間違っていますか？ – Wizche
私はあなたの聴取者には何も見当たりませんでしたが、まずNullPointerExceptionをデバッグするべきだと思います。ファイルロックの問題を引き起こすクリティカルパスでインデックスキューを強制終了していると思われます。 NPEはリスナーの何かに起因する可能性があると思います。 – Sanne