7:47 a.m.
PerDPQueueProcessor forces release of lock even if not held - causes corrupt index
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Key: HSEARCH-573
URL:
http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-573
Project: Hibernate Search
Issue Type: Bug
Affects Versions: 3.2.1, 3.2.0.Final, 3.2.0.CR1
Environment: Hibernate 3.5.0-Final, Oracle 10g
Reporter: Christian Köberl
Occurs: when an indexed entity is modified while another thread is re-indexing the index
for that entity
Consequences: Hibernate Search calls "workspace.forceLockRelease();" in the
catch-block of PerDPQueueProcessor#run - so the lock held by the batch indexer is
forcefully released. That means the next entity index operation will write to the index
causing the index to be corrupt.
h2. First Exception - triggers forceLockRelease
{noformat}
ERROR| Unexpected error in Lucene Backend:
| at
org.hibernate.search.backend.impl.lucene.PerDPQueueProcessor.run(PerDPQueueProcessor.java:118)
org.hibernate.search.SearchException: Unable to open IndexWriter
at org.hibernate.search.backend.Workspace.getIndexWriter(Workspace.java:159)
at
org.hibernate.search.backend.impl.lucene.PerDPQueueProcessor.run(PerDPQueueProcessor.java:103)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:432)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:284)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:678)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:703)
at java.lang.Thread.run(Thread.java:811)
Caused by:
org.apache.lucene.store.LockObtainFailedException: Lock obtain timed out:
SimpleFSLock@C:\Temp\turntableLuceneIndex\LogEntry\lucene-74da319434c1dd9f133d63245791e1b4-write.lock
at org.apache.lucene.store.Lock.obtain(Lock.java:85)
at org.apache.lucene.index.IndexWriter.init(IndexWriter.java:1538)
at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1067)
at org.hibernate.search.backend.Workspace.getIndexWriter(Workspace.java:152)
... 7 more
WARN | going to force release of the IndexWriter lock
| at
org.hibernate.search.backend.Workspace.forceLockRelease(Workspace.java:221)
{noformat}
h2. second Exception - index is destroyed
{noformat}
ERROR| Exception occurred org.hibernate.search.SearchException: Unable to add to Lucene
index: class com.poi.egh.turntable.vehicle.domain.vehicle.Vehicle#200
Primary Failure:
Entity com.poi.egh.turntable.vehicle.domain.vehicle.Vehicle Id 200 Work Type
org.hibernate.search.backend.AddLuceneWork
| at
org.hibernate.search.exception.impl.LogErrorHandler.logError(LogErrorHandler.java:83)
org.hibernate.search.SearchException: Unable to add to Lucene index: class
com.poi.egh.turntable.vehicle.domain.vehicle.Vehicle#200
at
org.hibernate.search.backend.impl.lucene.works.AddWorkDelegate.performWork(AddWorkDelegate.java:81)
at
org.hibernate.search.backend.impl.lucene.PerDPQueueProcessor.run(PerDPQueueProcessor.java:106)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:432)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:284)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:678)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:703)
at java.lang.Thread.run(Thread.java:811)
Caused by:
java.io.IOException: Cannot overwrite: C:\temp\turntableLuceneIndex\vehicle\_5.fdt
at org.apache.lucene.store.FSDirectory.initOutput(FSDirectory.java:362)
at org.apache.lucene.store.SimpleFSDirectory.createOutput(SimpleFSDirectory.java:58)
at org.apache.lucene.index.FieldsWriter.<init>(FieldsWriter.java:61)
at
org.apache.lucene.index.StoredFieldsWriter.initFieldsWriter(StoredFieldsWriter.java:66)
at
org.apache.lucene.index.StoredFieldsWriter.finishDocument(StoredFieldsWriter.java:144)
at org.apache.lucene.index.StoredFieldsWriter$PerDoc.finish(StoredFieldsWriter.java:190)
at
org.apache.lucene.index.DocumentsWriter$WaitQueue.writeDocument(DocumentsWriter.java:1466)
at org.apache.lucene.index.DocumentsWriter$WaitQueue.add(DocumentsWriter.java:1485)
at org.apache.lucene.index.DocumentsWriter.finishDocument(DocumentsWriter.java:1089)
at org.apache.lucene.index.DocumentsWriter.updateDocument(DocumentsWriter.java:775)
at org.apache.lucene.index.DocumentsWriter.addDocument(DocumentsWriter.java:750)
at org.apache.lucene.index.IndexWriter.addDocument(IndexWriter.java:2454)
at
org.hibernate.search.backend.impl.lucene.works.AddWorkDelegate.performWork(AddWorkDelegate.java:77)
... 7 more
{noformat}
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