Hello,
the body from my previous mail was filtered out...
we need to migrate our lucene 5.5 indexes to version 8.11.1. fortunately i
found the IndexUpgrader class which i didn't know yet.
i tried to migrate from major version to major version.
so i did
java -cp lucene-core-6.6.6.jar;lucene-backward-codecs-6.6.6.jar
org.apache.lucene.index.IndexUpgrader -delete-prior-commits -verbose
"V:\\LuceneMigration\\5"
next step
java -cp lucene-core-7.7.3.jar;lucene-backward-codecs-7.7.3.jar
org.apache.lucene.index.IndexUpgrader -delete-prior-commits -verbose
"V:\\LuceneMigration\\5"
and then
java -cp lucene-core-8.11.1.jar;lucene-backward-codecs-8.11.1.jar
org.apache.lucene.index.IndexUpgrader -delete-prior-commits -verbose
"V:\\LuceneMigration\\5"
the first two seems to work well.
but with the last i get
MS 0 [2022-01-12T14:04:24.248Z; main]: initDynamicDefaults spins=true
maxThreadCount=1 maxMergeCount=6
IW 0 [2022-01-12T14:04:24.275Z; main]: init: hit exception on init; releasing
write lock
Exception in thread "main" org.apache.lucene.index.IndexFormatTooOldException:
Format version is not supported (resource
BufferedChecksumIndexInput(MMapIndexInput(path="V:\LuceneMigration\5\segments_91"))):
This index was initially created with Lucene 6.x while the current version is
8.11.1 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:322)
at
org.apache.lucene.index.SegmentInfos.readCommit(SegmentInfos.java:291)
at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:1037)
at org.apache.lucene.index.IndexUpgrader.upgrade(IndexUpgrader.java:167)
at org.apache.lucene.index.IndexUpgrader.main(IndexUpgrader.java:78)
Suppressed: org.apache.lucene.index.CorruptIndexException: checksum
passed (7268b2f2). possibly transient resource issue, or a Lucene or JVM bug
(resource=BufferedChecksumIndexInput(MMapIndexInput(path="V:\LuceneMigration\5\segments_91")))
at
org.apache.lucene.codecs.CodecUtil.checkFooter(CodecUtil.java:466)
at
org.apache.lucene.index.SegmentInfos.readCommit(SegmentInfos.java:434)
... 4 more
did i anything wrong?
thanks for help.
regards
Sascha
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