Today I tried to upgrade a Lucene 4.10 index to 5.2 using the IndexUpgrader.
This throws the following exception:
Exception in thread "Lucene Merge Thread #0"
org.apache.lucene.index.MergePolicy$MergeException:
org.apache.lucene.index.IndexFormatTooOldException: Format version is
not supported (resource
BufferedChecksumIndexInput(MMapIndexInput(path="/data/title_lu5_en_201506/vol2/_0_Direct_0.dvdm"))):
2 (needs to be between 3 and 3). This version of Lucene only supports
indexes created with release 4.0 and later.
at
org.apache.lucene.index.ConcurrentMergeScheduler.handleMergeException(ConcurrentMergeScheduler.java:673)
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:641)
Caused by: org.apache.lucene.index.IndexFormatTooOldException: Format
version is not supported (resource
BufferedChecksumIndexInput(MMapIndexInput(path="/data/title_lu5_en_201506/vol2/_0_Direct_0.dvdm"))):
2 (needs to be between 3 and 3). This version of Lucene only supports
indexes created with release 4.0 and later.
at
org.apache.lucene.codecs.CodecUtil.checkHeaderNoMagic(CodecUtil.java:214)
at org.apache.lucene.codecs.CodecUtil.checkHeader(CodecUtil.java:199)
at
org.apache.lucene.codecs.CodecUtil.checkIndexHeader(CodecUtil.java:256)
at
org.apache.lucene.codecs.memory.DirectDocValuesProducer.<init>(DirectDocValuesProducer.java:126)
at
org.apache.lucene.codecs.memory.DirectDocValuesFormat.fieldsProducer(DirectDocValuesFormat.java:76)
at
org.apache.lucene.codecs.perfield.PerFieldDocValuesFormat$FieldsReader.<init>(PerFieldDocValuesFormat.java:268)
at
org.apache.lucene.codecs.perfield.PerFieldDocValuesFormat.fieldsProducer(PerFieldDocValuesFormat.java:358)
at
org.apache.lucene.index.SegmentDocValues.newDocValuesProducer(SegmentDocValues.java:51)
at
org.apache.lucene.index.SegmentDocValues.getDocValuesProducer(SegmentDocValues.java:67)
at
org.apache.lucene.index.SegmentReader.initDocValuesProducer(SegmentReader.java:141)
at org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:81)
at
org.apache.lucene.index.ReadersAndUpdates.getReader(ReadersAndUpdates.java:132)
at
org.apache.lucene.index.ReadersAndUpdates.getReaderForMerge(ReadersAndUpdates.java:604)
at
org.apache.lucene.index.IndexWriter.mergeMiddle(IndexWriter.java:3893)
at org.apache.lucene.index.IndexWriter.merge(IndexWriter.java:3543)
at
org.apache.lucene.index.ConcurrentMergeScheduler.doMerge(ConcurrentMergeScheduler.java:581)
at
org.apache.lucene.index.ConcurrentMergeScheduler$MergeThread.run(ConcurrentMergeScheduler.java:619)
We use DirectDocValuesFormat for two fields and I think that this is the
problem.
Any ideas how to upgrade the index to 5.2 anyway?
Thanks for your help!
Sven
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