On 22/09/2011 11:56, Paul Taylor wrote:
Id made just a few changes to my code to remove deprecations that
ocurred when I upgraded to Lucene 3.1, all tests work fine but when I
tried to build a real index it gives this error during optimization stage
Exception in thread "main" java.nio.channels.OverlappingFileLockException
at
sun.nio.ch.FileChannelImpl$SharedFileLockTable.checkList(FileChannelImpl.java:1166)
at
sun.nio.ch.FileChannelImpl$SharedFileLockTable.add(FileChannelImpl.java:1068)
at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:868)
at java.nio.channels.FileChannel.tryLock(FileChannel.java:962)
at
org.apache.lucene.store.NativeFSLock.obtain(NativeFSLockFactory.java:216)
at org.apache.lucene.store.Lock.obtain(Lock.java:72)
at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1097)
at
org.musicbrainz.search.index.ThreadedIndexWriter.<init>(ThreadedIndexWriter.java:66)
at
org.musicbrainz.search.index.IndexBuilder.createIndexWriter(IndexBuilder.java:229)
at
org.musicbrainz.search.index.IndexBuilder.main(IndexBuilder.java:152)
Some progress with this Ive realized the problem isn't with my code
changes but where the indexes are being created. I am running on a Mac
with OSX10.7 Lion with a connected external format as MS-DOS FAT-32.
If I build the indexes to my mac hardrive it always works, but if I
write to the external harddrive fails(note this is just an externally
connected drive not a network drive), the problem occurs when trying to
initilize the 2nd IndexWriter, the first IndexWriter has finished
building the index but hasnt closed the writer yet because it has now
started optmizing the index.
I dont understand why they seem to be using the same lock because they
are creating different indexes and indexing them to different subfolders.
So it seems the problem might be because Im running MacOS but using a
Windows filesystem to store the indexes so instead of using
FSDirectory.open() I instantiated an MMAPDirectory, but got the same error.
I then tried specifying a different lock factory
fsDir = FSDirectory.open(new File(path), new SimpleFSLockFactory() );
and now it fails in the same place but with a timeout problem
Exception in thread "main"
org.apache.lucene.store.LockObtainFailedException: Lock obtain timed
out:
SimpleFSLock@/Volumes/DDRIVE/Shared/Musicbrainz/releasegroup_index/write.lock
at org.apache.lucene.store.Lock.obtain(Lock.java:84)
at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1112)
at
org.musicbrainz.search.index.ThreadedIndexWriter.<init>(ThreadedIndexWriter.java:66)
at
org.musicbrainz.search.index.IndexBuilder.createIndexWriter(IndexBuilder.java:230)
at
org.musicbrainz.search.index.IndexBuilder.main(IndexBuilder.java:153)
Paul
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