Upgrading Solr index from 6 to 8
问题 I have a core which was created years ago, running correctly from a Solr 6.x. I've upgraded Solr to 7.7.3. I've launched the IndexUpgrade script: /opt/solr/server/solr-webapp/webapp/WEB-INF/lib$ sudo java -cp lucene-core-7.7.3.jar:lucene-backward-codecs-7.7.3.jar org.apache.lucene.index.IndexUpgrader /var/solr/data/hms/data/index/ It silently run, so my assumption is that it did what it had to do correctly. Then I've upgraded to Solr 8.7.0, and launched the script: /opt/solr/server/solr