Maybe a silly question: is it feasible (on your scale) to rebuild your index from your source of truth data?
Thanks! On Tue, Aug 6, 2024 at 2:11 PM Michael Sokolov <msoko...@gmail.com> wrote: > Yes, there is no support for upgrading a pre-8.x index to 9 or later. > At some point it was decided that supporting that would lead to grief > for users and/or hamper development of Lucene, so now you can only > upgrade one major version. If you need to do so, the best supported > option is to write a program that reads your data from one index (old > version) and writes it to a new one. There has been discussion off > and on about providing a "best effort" upgrade path that might lose > some data or fidelity or something, but this is just being kicked > around - as far as I can tell nobody has started working on it. > > On Mon, Aug 5, 2024 at 3:04 PM Jayamal Jayamaha > <jayamaljayama...@gmail.com> wrote: > > > > 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 > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
