Hi All,
I am trying to upgrade Lucene index from 4.6 to 8.0.0. When I'm trying to
upgrade tool using:
java -cp lucene-core.jar:lucene-backward-codecs.jar \
org.apache.lucene.index.IndexUpgrader -delete-prior-commits \
/scratch/***/workspaces/trunk/****/indexes/4.6/
Script is working fine from 4.6 to 5.5.5, 5.5.5 to 6.6.6, 6.6.6 to 7.7.2. But
When I am trying to upgrade from 7.7.2 to 8.0.0 it is throwing error as below.
Exception in thread "main" org.apache.lucene.index.IndexFormatTooOldException:
Format version is not supported (resource
BufferedChecksumIndexInput(MMapIndexInput(path="/scratch/jbaviset/workspaces/trunk/directorlocal/config/casemanagement/indexes/4.6/sd/segments_9"))):
This index was initially created with Lucene 6.x while the current version is
8.0.0 and Lucene only supports reading the current and previous major
versions.. This version of Lucene only supports indexes created with release
7.0 and later.
at org.apache.lucene.index.SegmentInfos.readCommit(SegmentInfos.java:318)
at org.apache.lucene.index.SegmentInfos.readCommit(SegmentInfos.java:289)
at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:846)
at org.apache.lucene.index.IndexUpgrader.upgrade(IndexUpgrader.java:167)
at org.apache.lucene.index.IndexUpgrader.main(IndexUpgrader.java:78)
_____
We want to upgrade from 4.6 to 8.0.0. Till 7.7.2 it is upgrading without any
issues, but when I'm using for Lucene version 7.7.2 in my code indexing is
working fine. But Lucene 8.0.0 is not working.
Please help me in upgrading 8.0.0
Please let me know any option other than reindexing.
Thanks,
Jyothsna
