Wiz*_*che 5 java lucene solr hibernate-search
我使用Hibernate Search在Web应用程序上索引和全文搜索项目,没有问题!
从我的pom.xml:
<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>
现在,在开始制作之前,我试图使用Apache JMeter对我的Web应用程序的搜索功能进行压力测试.当使用多个线程进行测试时,我会收到大量以下异常:
17:11:57,670 ERROR LogErrorHandler:82 - Exception occurred org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out: SimpleFSLock@/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: SimpleFSLock@/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
我的索引创建是使用以下函数完成的(从@Transactional方法调用):
@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);
}
创建索引后,对索引的所有更改都将通过自定义FullTextIndexEventListener进行:
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;
}
}
上面的例外不会影响应用程序本身(搜索确实有效),但它有时会导致另一个更严重的异常(我认为这与锁定问题有关):
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)
任何提示？
编辑:库调整和JMeter攻击性增加(更多线程)后,异常和索引损坏仍然出现:
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
编辑调试后:生成 FileNotFound(以及IndexWriter NPE)
IndexWriter writer = new IndexWriter( directoryProvider.getDirectory(), writerConfig );
在Workspace.createNewIndexWriter()方法中.
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
我想我解决了。
问题不在于 Hibernate Search 本身，而在于 Atomikos 在超过并发事务阈值后杀死了线程（可能使文件描述符保持打开状态）。我增加了并发事务限制（为 50），问题就消失了。
尽管如此，我仍然不明白为什么每次执行 lucene 查询时 hibernate search 都会打开索引编写器。
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