Hello Jaivik, You can upgrade to the next major version (Solr X → X+1) but not to the one after that (Solr X → X+2), even if you try to do it one major version at a time (Solr X → X+1 → X+2). This is a consequence of Lucene's back-compatibility strategy. The index "knows" in which major version it was built and retains this information in the X → X+1 upgrade.
Reindexing is your only option here. https://solr.apache.org/guide/8_11/reindexing.html#upgrades Thomas Op ma 31 okt. 2022 om 12:05 schreef Jaivik Patel <jaivik.pa...@digite.com.invalid>: > Hi, > I am trying to upgrade the Solr version from 5.4.1 to 8.11.2. > I had installed solr 5.4.1 on my production server which consists of a lot > of data which takes a lot of time to reindex data for solr 8.11.2. > I have tried the IndexUpgrader tool but it's not working because I am > upgrading Solr between two major versions(not consecutive). > Is there any faster way to upgrade the solr version from 5.4.1 to 8.11.2 > without affecting my production? > > Could you help me please? > > Thank you! >
