Weird exception with Lucene index

[Pablo Pareja]

Hi,

I'm getting this exception when using a Lucene index and don't have any idea why I might be getting it:

SEVERE: null

java.lang.RuntimeException: org.apache.lucene.index.CorruptIndexException: unrecognized format -3 in file "_2q.fnm"

        at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:606)

        at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexSearcher(LuceneDataSource.java:489)

        at org.neo4j.index.impl.lucene.LuceneIndex.query(LuceneIndex.java:248)

        at org.neo4j.index.impl.lucene.LuceneIndex.get(LuceneIndex.java:187)

        at com.era7.bioinfo.bio4jmodel.util.NodeRetriever.getNCBITaxonByTaxId(NodeRetriever.java:278)

        at com.era7.bioinfo.mg7.CountTaxonomyFreqs.main(CountTaxonomyFreqs.java:86)

        at com.era7.bioinfo.mg7.CountTaxonomyFreqs.execute(CountTaxonomyFreqs.java:44)

        at com.era7.lib.bioinfo.bioinfoutil.ExecuteFromFile.main(ExecuteFromFile.java:66)

        at com.era7.bioinfo.mg7.MG7.main(MG7.java:34)

Caused by: org.apache.lucene.index.CorruptIndexException: unrecognized format -3 in file "_2q.fnm"

        at org.apache.lucene.index.FieldInfos.read(FieldInfos.java:349)

        at org.apache.lucene.index.FieldInfos.<init>(FieldInfos.java:71)

        at org.apache.lucene.index.IndexWriter.getFieldInfos(IndexWriter.java:1197)

        at org.apache.lucene.index.IndexWriter.getCurrentFieldInfos(IndexWriter.java:1213)

        at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1149)

        at org.neo4j.index.impl.lucene.LuceneDataSource.getIndexWriter(LuceneDataSource.java:593)

        ... 8 more

I'm using Neo4j 1.7 on a Linux machine.

Any clues?

Thanks!

Pablo

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[David Montag]

Hi Pablo,

That's most likely caused by a version mismatch. What Neo4j version was the store created with, and which version are you using to access it? Are you running embedded?

Thanks,
David

[Pablo Pareja]

Hi David, 

Thanks for the quick response. You're right! 

I was combining two different programs and one of them has a version around 1.5 whilst the other one is built with 1.7, (silly me... :P )

I probably corrupted the DB then, because I was adding new content when using the program compiled with 1.5 to a previously created DB with 1.7 version .... 

Cheers,

Pablo 

[David Montag]

It shouldn't be corrupted. It's just that 1.7 uses a later Lucene version that 1.5 can't read.

-David

[Pablo Pareja]

Ok, thanks ;)

Pablo

[David Montag]

Happy to help :)

--

David Montag <david....@neotechnology.com>

Neo Technology, www.neotechnology.com

Cell: 650.556.4411

Skype: ddmontag