Hello I am currently working on a project that is using apache lucene 4.1.0 version. Now I need to upgrade that version to 9.11.1. So I configure the imports and configure the codebase according to the new lucene version. Now I need to upgrade existing indexes which have been created using lucene version 4.1.0 to version 9.11.1. For that I tried following methods
1. Upgrade indexes to version 5.5.5 using index upgrader 2. Upgrade indexes to version 6.6.2 form the previously upgraded indexes using index upgrader 3. Upgrade indexes to version 7.2.1 form the previously upgraded indexes using index upgrader After than when I try to upgrade the indexes to version 8.1.0 from previously upgraded version which is version 7.2.1, I am getting an error saying org.apache.lucene.index.IndexFormatTooNewException: Format version is not supported After I did some research I found in several stackoverflow threads and other articles that index upgrading has been disabled after the version 7.2.1. but I wasn't able to find that kind of statement in official lucene docs. What I just wanted to know from you are as follows 1. has index upgrading been disabled actually after version 7.2.1? and can't we use that method to upgrade indexes after version 7.2.1? 2. If yes is there any other methods available to upgrade existing indexes without reindexing all the indexes again If you can give me some knowledge on above, it would be much appreciated Best regards Jayamal Jayamaha
