Hi there, I understood that Lucene V4 could read 3.x index files by configuring Lucene3xCodec but what exactly needs to be done here?
I used DEMO code from V4.10.0 to generate v4 index files and could read them without problem. When I tried to read index files generated from V3 I got the following errors: Exception in thread "main" org.apache.lucene.index.CorruptIndexException: did not read all bytes from file: read 65 vs size 66 (resource: BufferedChecksumIndexInput(MMapIndexInput(path="C:\indexes\v3\_1os1_5.del"))) at org.apache.lucene.codecs.CodecUtil.checkEOF(CodecUtil.java:252) at org.apache.lucene.codecs.lucene40.BitVector.<init>(BitVector.java:363) at org.apache.lucene.codecs.lucene40.Lucene40LiveDocsFormat.readLiveDocs(Lucene40LiveDocsFormat.java:91) at org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:116) at org.apache.lucene.index.StandardDirectoryReader$1.doBody(StandardDirectoryReader.java:62) at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:913) at org.apache.lucene.index.StandardDirectoryReader.open(StandardDirectoryReader.java:53) at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:67) at org.apache.lucene.demo.SearchFiles.main(SearchFiles.java:95) My classpath includes the following jars from V4: lucene-core-4.10.0.jar lucene-analyzers-common-4.10.0.jar lucene-queries-4.10.0.jar lucene-queryparser-4.10.0.jar lucene-facet-4.10.0.jar lucene-expressions-4.10.0.jar Noticed that META-INF/services/org.apache.lucene.codecs.Codec ( part of lucene-core-4.10.0.jar) contains the following lines: org.apache.lucene.codecs.lucene40.Lucene40Codec org.apache.lucene.codecs.lucene3x.Lucene3xCodec org.apache.lucene.codecs.lucene41.Lucene41Codec org.apache.lucene.codecs.lucene42.Lucene42Codec org.apache.lucene.codecs.lucene45.Lucene45Codec org.apache.lucene.codecs.lucene46.Lucene46Codec org.apache.lucene.codecs.lucene49.Lucene49Codec org.apache.lucene.codecs.lucene410.Lucene410Codec Does that mean Lucene3xCodec will be picked up automatically based on the index files itself? Where is the API I could force the code to use V3 setting? IndexReader and IndexSearcher don’t seem to have anywhere I can pass that in? Did some search but couldn't find the useful resources covered that. Much appreciated if someone could point out the right direction. Regards, Patrick --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org