[
https://issues.apache.org/jira/browse/LUCENE-7582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15725280#comment-15725280
]
Michael McCandless commented on LUCENE-7582:
--------------------------------------------
Note that the exception you are hitting is a different issue than the JDK bug.
The JDK bug is about poor performance, whereas your exception prevent
IndexWriter.commit from working correctly.
I suspect your exception is because of how Lucene re-opens a file (for write)
when it needs to commit it. Are you using near-real-time readers? One
possible workaround might be to not use near-real-time readers, i.e. open your
reader from the Directory, and then refresh it after committing from
IndexWriter.
Do you have any external processes that open Lucene's index files, e.g. virus
checkers?
We have investiaged {{AsynchronousFileChannel}} in the past, see e.g.
http://jirasearch.mikemccandless.com/search.py?text=%22AsynchronousFileChannel%22
but it did not pan out.
If your indices are smallish you might get away with using {{MMapDirectory}}
even on 32 bit windows.
> NIOFSDirectory sometime doesn't work on windows
> -----------------------------------------------
>
> Key: LUCENE-7582
> URL: https://issues.apache.org/jira/browse/LUCENE-7582
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/store
> Affects Versions: 5.3.1
> Environment: Windows 10, 32 bits JVM
> Reporter: Kevin Senechal
>
> Hi!
> I've an error using lucene on windows. I already post a question on modeshape
> forum (https://developer.jboss.org/thread/273070) and it looks that
> NIOFSDirectory is not working well on windows as described in the java
> documentation of this class.
> {quote}NOTE: NIOFSDirectory is not recommended on Windows because of a bug in
> how FileChannel.read is implemented in Sun's JRE. Inside of the
> implementation the position is apparently synchronized. See here for
> details.{quote}
> After reading the linked java issue
> (http://bugs.java.com/bugdatabase/view_bug.do?bug_id=6265734), it seems that
> there is a workaround to solve it, use an AsynchronousFileChannel.
> Is it a choice that has been made to not use AsynchronousFileChannel or will
> it be a good fix?
> You'll find the complete stacktrace below:
> {code:java}
> Caused by: org.modeshape.jcr.index.lucene.LuceneIndexException: Cannot commit
> index writer
> at org.modeshape.jcr.index.lucene.LuceneIndex.commit(LuceneIndex.java:155)
> ~[dsdk-launcher.jar:na]
> at
> org.modeshape.jcr.spi.index.provider.IndexChangeAdapter.completeWorkspaceChanges(IndexChangeAdapter.java:104)
> ~[dsdk-launcher.jar:na]
> at
> org.modeshape.jcr.cache.change.ChangeSetAdapter.notify(ChangeSetAdapter.java:157)
> ~[dsdk-launcher.jar:na]
> at
> org.modeshape.jcr.spi.index.provider.IndexProvider$AtomicIndex.notify(IndexProvider.java:1493)
> ~[dsdk-launcher.jar:na]
> at
> org.modeshape.jcr.bus.RepositoryChangeBus.notify(RepositoryChangeBus.java:190)
> ~[dsdk-launcher.jar:na]
> at
> org.modeshape.jcr.cache.document.WorkspaceCache.changed(WorkspaceCache.java:333)
> ~[dsdk-launcher.jar:na]
> at
> org.modeshape.jcr.txn.SynchronizedTransactions.updateCache(SynchronizedTransactions.java:223)
> ~[dsdk-launcher.jar:na]
> at
> org.modeshape.jcr.cache.document.WritableSessionCache.save(WritableSessionCache.java:751)
> ~[dsdk-launcher.jar:na]
> at org.modeshape.jcr.JcrSession.save(JcrSession.java:1171)
> ~[dsdk-launcher.jar:na]
> ... 19 common frames omitted
> Caused by: java.nio.file.FileSystemException:
> C:\Users\Christopher\Infiltrea3CLOUDTEST8\[email protected]\indexes\default\nodesByPath\_dc_Lucene50_0.doc:
> The process cannot access the file because it is being used by another
> process.
> at
> sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:86)
> ~[na:1.8.0_92]
> at
> sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)
> ~[na:1.8.0_92]
> at
> sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:102)
> ~[na:1.8.0_92]
> at
> sun.nio.fs.WindowsFileSystemProvider.newFileChannel(WindowsFileSystemProvider.java:115)
> ~[na:1.8.0_92]
> at java.nio.channels.FileChannel.open(FileChannel.java:287) ~[na:1.8.0_92]
> at java.nio.channels.FileChannel.open(FileChannel.java:335) ~[na:1.8.0_92]
> at org.apache.lucene.util.IOUtils.fsync(IOUtils.java:393)
> ~[dsdk-launcher.jar:na]
> at org.apache.lucene.store.FSDirectory.fsync(FSDirectory.java:281)
> ~[dsdk-launcher.jar:na]
> at org.apache.lucene.store.FSDirectory.sync(FSDirectory.java:226)
> ~[dsdk-launcher.jar:na]
> at
> org.apache.lucene.store.LockValidatingDirectoryWrapper.sync(LockValidatingDirectoryWrapper.java:62)
> ~[dsdk-launcher.jar:na]
> at org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4456)
> ~[dsdk-launcher.jar:na]
> at
> org.apache.lucene.index.IndexWriter.prepareCommitInternal(IndexWriter.java:2874)
> ~[dsdk-launcher.jar:na]
> at
> org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:2977)
> ~[dsdk-launcher.jar:na]
> at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:2944)
> ~[dsdk-launcher.jar:na]
> at org.modeshape.jcr.index.lucene.LuceneIndex.commit(LuceneIndex.java:152)
> ~[dsdk-launcher.jar:na]
> {code}
> Thank you in advance for your help
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
