Hi,
I tried to upgrade my test index from Solr 7.7.1 to Solr 8.0.0.
The file segments_4h7 already contains the string Lucene70.
I upgraded before with this command:
java -cp lucene-core-7.7.1.jar;lucene-backward-codecs-7.7.1.jar
org.apache.lucene.index.IndexUpgrader C:\solr\server\solr\syneris\data\index\
Everything went successful, when I start solr via solr.cmd start, no errors are
logged.
Now, when I try to upgrade to Solr 8 I also tried to upgraded the index with
the following command:
java -cp lucene-core-8.0.0.jar;lucene-backward-codecs-8.0.0.jar
org.apache.lucene.index.IndexUpgrader C:\solr\server\solr\syneris\data\index\
But I always get an exception:
Exception in thread "main" org.apache.lucene.index.IndexFormatTooOldException:
Format version is not supported (resource
BufferedChecksumIndexInput(MMapIndexInput(path="C:\solr\server\solr\syneris\data\index\segments_4h7"))):
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.SegmentInfos$1.doBody(SegmentInfos.java:432)
at org.apache.lucene.index.SegmentInfos$1.doBody(SegmentInfos.java:429)
at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:680)
at
org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:632)
at
org.apache.lucene.index.SegmentInfos.readLatestCommit(SegmentInfos.java:434)
at
org.apache.lucene.index.DirectoryReader.listCommits(DirectoryReader.java:260)
at org.apache.lucene.index.IndexUpgrader.upgrade(IndexUpgrader.java:158)
at org.apache.lucene.index.IndexUpgrader.main(IndexUpgrader.java:78)
Any ideas, without performing a full reindex?
Mit freundlichen Grüßen
Herbert Hackelsberger
Kundensupport/Qualitätssicherung
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