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Posted to dev@lucene.apache.org by "Shawn Heisey (JIRA)" <ji...@apache.org> on 2016/12/05 20:52:58 UTC
[jira] [Commented] (LUCENE-7582) NIOFSDirectory sometime doesn't
work on windows
[ https://issues.apache.org/jira/browse/LUCENE-7582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15723346#comment-15723346 ]
Shawn Heisey commented on LUCENE-7582:
--------------------------------------
Are you the one who mentioned pretty much this exact issue on the #lucene IRC channel several hours ago?
As I said on IRC, I think the correct solution is to use an MMap-based directory implementation and require that the users of your software install it with 64-bit hardware, OS, and Java. With hardware and software that are common today, a 64-bit requirement is *not* difficult to satisfy, even with Windows. MMapDirectory typically has better performance than the other file-based directory implementations, which is why it's default on 64-bit Java.
This javadoc talks about the differences between the filesystem-based Directory implementations:
http://lucene.apache.org/core/6_3_0/core/org/apache/lucene/store/FSDirectory.html
> 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\christopher@dooapp.com\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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