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anilit99
 Post subject: [Search]IndexReader exception while searching.
PostPosted: Wed Apr 23, 2008 3:24 pm 
Newbie

Joined: Wed Feb 20, 2008 6:42 pm
Posts: 14
Hi,
I am using Hibernate Search for a while. I have a dedicated server which continuously does the indexing and writes to a shared directory on a unix box. My jboss runs on a separate box and have access to the indexes directory.

Every thing is fine, and am able to search also, and the performance is reasonably ok. But if I search for some 10 - 30 times repeatedly I am getting this exception :
Code:
javax.persistence.PersistenceException: org.hibernate.search.SearchException: Unable to close Lucene IndexReader
   at org.hibernate.search.jpa.impl.FullTextQueryImpl.throwPersistenceException(FullTextQueryImpl.java:128)
   at org.hibernate.search.jpa.impl.FullTextQueryImpl.getResultList(FullTextQueryImpl.java:96)
   at com.sonymusic.aoma.search.lucene.ui.LuceneSearchAction.searchAndPopulatePage(LuceneSearchAction.java:190)
   at com.sonymusic.aoma.search.lucene.ui.LuceneSearchAction.doAction(LuceneSearchAction.java:157)
   at com.sonymusic.aoma.dispatcher.actions.SimpleDispatcherAction.executeAction(SimpleDispatcherAction.java:388)
   at com.sonymusic.aoma.dispatcher.DispatcherAction.execute(DispatcherAction.java:134)
   at com.sonymusic.aoma.dispatcher.DispatcherServlet.doChain(DispatcherServlet.java:119)
   at com.sonymusic.aoma.dispatcher.DispatcherServlet.doChain(DispatcherServlet.java:97)
   at com.sonymusic.aoma.dispatcher.DispatcherServlet.service(DispatcherServlet.java:85)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
   at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
   at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
   at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
   at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437)
   at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:366)
   at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
   at java.lang.Thread.run(Thread.java:595)
Caused by: org.hibernate.search.SearchException: Unable to close Lucene IndexReader
   at org.hibernate.search.reader.SharedReaderProvider.replaceActiveReader(SharedReaderProvider.java:190)
   at org.hibernate.search.reader.SharedReaderProvider.openReader(SharedReaderProvider.java:92)
   at org.hibernate.search.query.FullTextQueryImpl.buildSearcher(FullTextQueryImpl.java:454)
   at org.hibernate.search.query.FullTextQueryImpl.list(FullTextQueryImpl.java:228)
   at org.hibernate.search.jpa.impl.FullTextQueryImpl.getResultList(FullTextQueryImpl.java:85)
   ... 26 more
Caused by: java.io.IOException: Stale NFS file handle
   at java.io.RandomAccessFile.close0(Native Method)
   at java.io.RandomAccessFile.close(RandomAccessFile.java:532)
   at org.apache.lucene.store.FSDirectory$FSIndexInput$Descriptor.close(FSDirectory.java:514)
   at org.apache.lucene.store.FSDirectory$FSIndexInput.close(FSDirectory.java:561)
   at org.apache.lucene.index.SegmentReader.closeNorms(SegmentReader.java:540)
   at org.apache.lucene.index.SegmentReader.doClose(SegmentReader.java:269)
   at org.apache.lucene.index.IndexReader.close(IndexReader.java:842)
   at org.apache.lucene.index.MultiReader.doClose(MultiReader.java:255)
   at org.apache.lucene.index.IndexReader.close(IndexReader.java:842)
   at org.hibernate.search.reader.SharedReaderProvider.replaceActiveReader(SharedReaderProvider.java:187)


Anybody know, whats wrong here ? I left the IndexReader as default only which means its shared. Any help is highly appreciated.

thanks
Anil.
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sanne.grinovero
 Post subject:
PostPosted: Wed Apr 23, 2008 4:37 pm 
Hibernate Team
Hibernate Team

Joined: Fri Oct 05, 2007 4:47 pm
Posts: 2536
Location: Third rock from the Sun
Hi,
the problem is the NFS file system: look at this javadoc:
http://lucene.apache.org/java/2_3_0/api/org/apache/lucene/index/IndexWriter.html

The simplest solution is to avoid NFS; would that be possible in your scenario?

regards,

_________________
Sanne
http://in.relation.to/

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anilit99
 Post subject:
PostPosted: Wed Apr 23, 2008 5:01 pm 
Newbie

Joined: Wed Feb 20, 2008 6:42 pm
Posts: 14
Hi grinovero,
Thanks a lot, for the quick response.
I am afraid, this is totally not possible in my case. But the interesting thing is, I have only one writer per entity class. I still dont know why this contention should happen. Any ideas ?

thanks
Anil.
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sanne.grinovero
 Post subject:
PostPosted: Wed Apr 23, 2008 5:54 pm 
Hibernate Team
Hibernate Team

Joined: Fri Oct 05, 2007 4:47 pm
Posts: 2536
Location: Third rock from the Sun
Hi,
this is not a contention problem, it appears that some file has been deleted on the remote server while still needed by an IndexSearcher.
This is normal behaviour: Lucene works this way; normally on local filesystems it asks OS to not really delete the file until the last IndexSearcher is closed; this is not supported on NFS so its request is ignored.

To solve this is quite simple: instead of using NFS you should configure Hibernate Search to use the "JMS Master/Slave configuration" (look at reference docs). This configuration has been created exactly for this type of scenario.

_________________
Sanne
http://in.relation.to/

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