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https://issues.apache.org/jira/browse/LUCENE-7582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15725636#comment-15725636
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Uwe Schindler commented on LUCENE-7582:
---------------------------------------
I checked the above stack trace and agree with Mike. The issue you see is
completely unrelated to NIOFSDir. It may also happen with other directory
implementations. It looks more to be "the" general windows issue with open
files. Virus checkers is my first guess. Lucene needs full control on the file
it opened for full commit safety. Any other process (like virus scanners) that
prevents files from being deleted/opened may cause this. The problem is that
lucene creates and deletes in short times so it is very likely that lucene
creates a file, the virus checker is scanning it, but at same time lucene
deletes it or renames it for committing.
In general on server side installations, the recommendation to users is to
exclude all directories where Lucene writes its indexes (e.g. Solr installation
dir) from virus checking. Of course this is an issue for desktop applications,
but thats's not a common Lucene use case.
> "Cannot commit index writer" in some cases 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
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