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From Rob Bygrave <robin.bygr...@gmail.com>
Subject Re: Bug in v3.3.0? - IndexNotFoundException: no segments* file found in org.apache.lucene.store.SimpleFSDirectory@
Date Fri, 08 Jul 2011 04:22:25 GMT
Great, thanks.

On 8 July 2011 15:08, Robert Muir <rcmuir@gmail.com> wrote:

> Hi, this isn't a bug, its a documented change in behavior in the 3.1
> CHANGES.txt notes:
>
> * LUCENE-2386: IndexWriter no longer performs an empty commit upon new
> index
>  creation. Previously, if you passed an empty Directory and set OpenMode to
>  CREATE*, IndexWriter would make a first empty commit. If you need that
>  behavior you can call writer.commit()/close() immediately after you create
> it.
>
>
> http://svn.apache.org/repos/asf/lucene/dev/tags/lucene_solr_3_1/lucene/CHANGES.txt
>
> On Thu, Jul 7, 2011 at 11:04 PM, Rob Bygrave <robin.bygrave@gmail.com>
> wrote:
> > This looks like a Bug in v3.3.0.
> >
> > The code below works in 3.0.1 without calling the writer.commit() before
> >  IndexReader.open(directory).
> >
> > In v3.3.0 when the index does not yet exist I need to add the
> > writer.commit() and I believe that creates the segments. If I don't add
> the
> > writer.commit() then I get the IndexNotFoundException: no segments* file
> > found exception below.
> >
> >
> >            IndexWriterConfig config = new
> > IndexWriterConfig(Version.LUCENE_33, analyzer);
> >            config.setOpenMode(OpenMode.CREATE_OR_APPEND);
> >            config.setIndexDeletionPolicy(commitDeletionPolicy);
> >            IndexWriter writer = new IndexWriter(directory, config);
> >
> >            // -----------------
> >            // Need to add this w.commit() when the index is does not
> exist
> >            writer.commit();
> >            // -----------------
> >
> >            // without the commit above this fails with
> > a IndexNotFoundException when the index does not exist
> >            IndexReader reader = IndexReader.open(directory);
> >
> >
> >
> > The exception when writer.commit() is not there and the index does not
> exist
> > is:
> >
> > Caused by: org.apache.lucene.index.IndexNotFoundException: no segments*
> file
> > found in org.apache.lucene.store.SimpleFSDirectory@C
> :\dev\workspace-sts\uoa-tmp-copydb\lucene\dst\model.indexdefn.OrgUnitIndexDefn
> > lockFactory=org.apache.lucene.store.NativeFSLockFactory@3bc257: files:
> > [write.lock]
> > at
> >
> org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:708)
> > at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:75)
> > at org.apache.lucene.index.IndexReader.open(IndexReader.java:428)
> > at org.apache.lucene.index.IndexReader.open(IndexReader.java:274)
> >
> >
> > The workaround is to add the writer.commit() and that seems pretty
> > reasonable to me.
> >
> > Thanks, Rob.
> >
>
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