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From Erick Erickson <erickerick...@gmail.com>
Subject Re: indexWriter.addIndexes, Disk space, and open files
Date Tue, 25 May 2010 13:16:37 GMT
What op system and what file system are you using? Is the file system local
or
networked?

What does it take to remove the files. That is, can you do it manually after
the
program shuts down?

Best
Erick

On Tue, May 25, 2010 at 5:42 AM, Regan Heath <
regan.heath@bridgeheadsoftware.com> wrote:

>
> Hi,
>
> Appologies if this the wrong place to post this, or if it has been answered
> somewhere (I have searched and failed to find anything matching my case
> exactly).
>
> We're using Lucene 2.3.2 (an old version, I know).
>
> We have a system where we use a number of master indexes and a number of
> temp indexes.  At some point we will decide to perform a merge, where we
> select a single master index and all (or as many temp indexes as will fit -
> based on a given max size) temp indexes, opening IndexReaders for each.
>
> <code condensed for clarity>
>
> for(String tempIndexPath: tempIndexPaths)
> {
>  reader = IndexReader.open(tempIndexPath);
>  readers.add(reader);
> }
>
> IndexReader[] result = new IndexReader[readers.size()];
> return readers.toArray(result);
>
> We then create a new index with IndexWriter and call addIndexes passing the
> array of IndexReaders.
>
> <code condensed for clarity>
>
>  File mergeMasterIndex = ...
>  ...
>  indexWriter = new IndexWriter(mergeMasterIndex, new StandardAnalyzer(),
> true);
>  indexWriter.setMaxBufferedDocs(-1);
>  indexWriter.setMaxMergeDocs(2147483647);
>  indexWriter.setMergeFactor(10);
>  indexWriter.setMaxFieldLength(10000);
>  indexWriter.addIndexes(indexReaders);
>  indexWriter.optimize();
>
> This throws an IOException, due to lack of disk space (testing with small
> indexes and a virtual 10mb disk..
> http://www.ltr-data.se/opencode.html#ImDisk)
>
> At this point we close all the readers, and the writer and attempt to
> cleanup/delete the 'failed' new index directory and files.  The problem is
> that there are some files being held open, specifically; _0.prx, _0.tii,
> _o.tis.
>
> There are no other readers or searchers open to this 'new' index, as it has
> just been created.  There are no readers/searchers open to the temp indexes
> being merged (we never search temp indexes), there may be a searcher open
> to
> the master index selected for the merge.
>
> So.. I am hoping someone can give me a clue as to why there are files being
> held open, whether this is a known bug and fixed in a specific version of
> lucene or if there is something I can do to force these files closed.
>
> I have tried the writer.close();  IndexReader.isLocked(directory);
> IndexReader.unlock(directory); trick, isLocked returns false, even ignoring
> that and calling unlock anyway made no difference (I think it threw an
> AlreadyClosedException or similar).
>
> The exception stack trace...
>
> java.io.IOException: There is not enough space on the disk
>        at java.io.RandomAccessFile.writeBytes(Native Method)
>        at java.io.RandomAccessFile.write(Unknown Source)
>        at
>
> org.apache.lucene.store.FSDirectory$FSIndexOutput.flushBuffer(FSDirectory.java:599)
>        at
>
> org.apache.lucene.store.BufferedIndexOutput.flushBuffer(BufferedIndexOutput.java:96)
>        at
>
> org.apache.lucene.store.BufferedIndexOutput.flush(BufferedIndexOutput.java:85)
>        at
>
> org.apache.lucene.store.BufferedIndexOutput.close(BufferedIndexOutput.java:109)
>        at
>
> org.apache.lucene.store.FSDirectory$FSIndexOutput.close(FSDirectory.java:606)
>        at
> org.apache.lucene.index.SegmentMerger.mergeTerms(SegmentMerger.java:398)
>        at
> org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:134)
>        at
> org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:110)
>        at
> org.apache.lucene.index.IndexWriter.addIndexes(IndexWriter.java:2428)
>        at
> com.bridgehead.index.ApplicationIndex.merge(ApplicationIndex.java:506)
>        at
> com.bridgehead.index.ServerThread.serviceMergeIndex(ServerThread.java:918)
>        at com.bridgehead.index.ServerThread.run(ServerThread.java:266)
>
> Info stream..
>
> IFD [ServerThread:/10.193.221.75:3821]: setInfoStream
>
> deletionPolicy=org.apache.lucene.index.KeepOnlyLastCommitDeletionPolicy@133796
> IW 0 [ServerThread:/10.193.221.75:3821]: setInfoStream:
> dir=org.apache.lucene.store.FSDirectory@F:\Master\14.merge autoCommit=true
> mergePolicy=org.apache.lucene.index.LogByteSizeMergePolicy@1a679b7
> mergeScheduler=org.apache.lucene.index.ConcurrentMergeScheduler@80f4cb
> ramBufferSizeMB=16.0 maxBuffereDocs=-1 maxBuffereDeleteTerms=-1
> maxFieldLength=10000 index=
> IW 0 [ServerThread:/10.193.221.75:3821]: optimize: index now
> IW 0 [ServerThread:/10.193.221.75:3821]:   flush: segment=null
> docStoreSegment=null docStoreOffset=0 flushDocs=false flushDeletes=false
> flushDocStores=false numDocs=0 numBufDelTerms=0
> IW 0 [ServerThread:/10.193.221.75:3821]:   index before flush
> IW 0 [ServerThread:/10.193.221.75:3821]: CMS: now merge
> IW 0 [ServerThread:/10.193.221.75:3821]: CMS:   index:
> IW 0 [ServerThread:/10.193.221.75:3821]: CMS:   no more merges pending;
> now
> return
> IW 0 [ServerThread:/10.193.221.75:3821]: now start transaction
> IW 0 [ServerThread:/10.193.221.75:3821]: flush at startTransaction
> IW 0 [ServerThread:/10.193.221.75:3821]:   flush: segment=null
> docStoreSegment=null docStoreOffset=0 flushDocs=false flushDeletes=false
> flushDocStores=false numDocs=0 numBufDelTerms=0
> IW 0 [ServerThread:/10.193.221.75:3821]:   index before flush
> IW 0 [ServerThread:/10.193.221.75:3821]: hit exception in addIndexes
> during
> merge
> IW 0 [ServerThread:/10.193.221.75:3821]: now rollback transaction
> IFD [ServerThread:/10.193.221.75:3821]: now checkpoint "segments_1" [0
> segments ; isCommit = false]
> IFD [ServerThread:/10.193.221.75:3821]: refresh [prefix=null]: removing
> newly created unreferenced file "_0.fdt"
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.fdt"
> IFD [ServerThread:/10.193.221.75:3821]: refresh [prefix=null]: removing
> newly created unreferenced file "_0.fdx"
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.fdx"
> IFD [ServerThread:/10.193.221.75:3821]: refresh [prefix=null]: removing
> newly created unreferenced file "_0.fnm"
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.fnm"
> IFD [ServerThread:/10.193.221.75:3821]: refresh [prefix=null]: removing
> newly created unreferenced file "_0.frq"
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.frq"
> IFD [ServerThread:/10.193.221.75:3821]: refresh [prefix=null]: removing
> newly created unreferenced file "_0.prx"
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.prx"
> IFD [ServerThread:/10.193.221.75:3821]: IndexFileDeleter: unable to remove
> file "_0.prx": java.io.IOException: Cannot delete
> F:\Master\14.merge\_0.prx;
> Will re-try later.
> IFD [ServerThread:/10.193.221.75:3821]: refresh [prefix=null]: removing
> newly created unreferenced file "_0.tii"
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.tii"
> IFD [ServerThread:/10.193.221.75:3821]: IndexFileDeleter: unable to remove
> file "_0.tii": java.io.IOException: Cannot delete
> F:\Master\14.merge\_0.tii;
> Will re-try later.
> IFD [ServerThread:/10.193.221.75:3821]: refresh [prefix=null]: removing
> newly created unreferenced file "_0.tis"
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.tis"
> IFD [ServerThread:/10.193.221.75:3821]: IndexFileDeleter: unable to remove
> file "_0.tis": java.io.IOException: Cannot delete
> F:\Master\14.merge\_0.tis;
> Will re-try later.
> IW 0 [ServerThread:/10.193.221.75:3821]: all running merges have aborted
> IW 0 [ServerThread:/10.193.221.75:3821]: now flush at close
> IW 0 [ServerThread:/10.193.221.75:3821]:   flush: segment=null
> docStoreSegment=null docStoreOffset=0 flushDocs=false flushDeletes=false
> flushDocStores=false numDocs=0 numBufDelTerms=0
> IW 0 [ServerThread:/10.193.221.75:3821]:   index before flush
> IW 0 [ServerThread:/10.193.221.75:3821]: CMS: now merge
> IW 0 [ServerThread:/10.193.221.75:3821]: CMS:   index:
> IW 0 [ServerThread:/10.193.221.75:3821]: CMS:   no more merges pending;
> now
> return
> IW 0 [ServerThread:/10.193.221.75:3821]: close: wrote segments file
> "segments_2"
> IFD [ServerThread:/10.193.221.75:3821]: now checkpoint "segments_2" [0
> segments ; isCommit = true]
> IFD [ServerThread:/10.193.221.75:3821]: delete pending file _0.prx
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.prx"
> IFD [ServerThread:/10.193.221.75:3821]: IndexFileDeleter: unable to remove
> file "_0.prx": java.io.IOException: Cannot delete
> F:\Master\14.merge\_0.prx;
> Will re-try later.
> IFD [ServerThread:/10.193.221.75:3821]: delete pending file _0.tii
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.tii"
> IFD [ServerThread:/10.193.221.75:3821]: IndexFileDeleter: unable to remove
> file "_0.tii": java.io.IOException: Cannot delete
> F:\Master\14.merge\_0.tii;
> Will re-try later.
> IFD [ServerThread:/10.193.221.75:3821]: delete pending file _0.tis
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.tis"
> IFD [ServerThread:/10.193.221.75:3821]: IndexFileDeleter: unable to remove
> file "_0.tis": java.io.IOException: Cannot delete
> F:\Master\14.merge\_0.tis;
> Will re-try later.
> IFD [ServerThread:/10.193.221.75:3821]: deleteCommits: now remove commit
> "segments_1"
> IFD [ServerThread:/10.193.221.75:3821]: delete "segments_1"
> IW 0 [ServerThread:/10.193.221.75:3821]: at close:
> IFD [ServerThread:/10.193.221.75:3821]: delete pending file _0.prx
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.prx"
> IFD [ServerThread:/10.193.221.75:3821]: IndexFileDeleter: unable to remove
> file "_0.prx": java.io.IOException: Cannot delete
> F:\Master\14.merge\_0.prx;
> Will re-try later.
> IFD [ServerThread:/10.193.221.75:3821]: delete pending file _0.tii
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.tii"
> IFD [ServerThread:/10.193.221.75:3821]: IndexFileDeleter: unable to remove
> file "_0.tii": java.io.IOException: Cannot delete
> F:\Master\14.merge\_0.tii;
> Will re-try later.
> IFD [ServerThread:/10.193.221.75:3821]: delete pending file _0.tis
> IFD [ServerThread:/10.193.221.75:3821]: delete "_0.tis"
> IFD [ServerThread:/10.193.221.75:3821]: IndexFileDeleter: unable to remove
> file "_0.tis": java.io.IOException: Cannot delete
> F:\Master\14.merge\_0.tis;
> Will re-try later.
>
>
>
> --
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> http://lucene.472066.n3.nabble.com/indexWriter-addIndexes-Disk-space-and-open-files-tp841735p841735.html
> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>
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