LGTM, but perhaps also should state that if possible you *should* update because the 8.x index may not be able to be read by the eventual 10 release.
On Thu, May 27, 2021 at 7:52 AM Michael Wechner <michael.wech...@wyona.com> wrote: > > I have added a QnA > > https://cwiki.apache.org/confluence/display/LUCENE/LuceneFAQ#LuceneFAQ-WhenIupradeLucene,forexamplefrom8.8.2to9.0.0,doIhavetoreindex? > > Hope that makes sense, otherwise let me know and I can correct/update :-) > > > > Am 26.05.21 um 23:56 schrieb Michael Wechner: > > using lucene-backward-codecs-9.0.0-SNAPSHOT.jar makes it work :-) > > > > Thank you very much! > > > > But IIUC it is recommended to reindex when upgrading, right? I guess > > similar to what Solr is recommending > > > > https://solr.apache.org/guide/8_0/reindexing.html > > > > > > Am 26.05.21 um 21:26 schrieb Michael Sokolov: > >> I think you need backward-codecs-9.0.0-SNAPSHOT there. It enables 9.0 > >> to read 8.x indexes. > >> > >> On Wed, May 26, 2021 at 9:27 AM Michael Wechner > >> <michael.wech...@wyona.com> wrote: > >>> Hi > >>> > >>> I am using Lucene 8.8.2 in production and I am currently doing some > >>> tests using 9.0.0-SNAPSHOT, whereas I have included > >>> lucene-backward-codecs, because in the log files it was asking me > >>> whether I have forgotten to include lucene-backward-codecs.jar > >>> > >>> <dependency> > >>> <groupId>org.apache.lucene</groupId> > >>> <artifactId>lucene-core</artifactId> > >>> <version>9.0.0-SNAPSHOT</version> > >>> </dependency> > >>> <dependency> > >>> <groupId>org.apache.lucene</groupId> > >>> <artifactId>lucene-queryparser</artifactId> > >>> <version>9.0.0-SNAPSHOT</version> > >>> </dependency> > >>> <dependency> > >>> <groupId>org.apache.lucene</groupId> > >>> <artifactId>lucene-backward-codecs</artifactId> > >>> <version>8.8.2</version> > >>> </dependency> > >>> > >>> But when querying index directories created with Lucene 8.8.2, then I > >>> receive the following error > >>> > >>> java.lang.NoClassDefFoundError: Could not initialize class > >>> org.apache.lucene.codecs.Codec$Holder > >>> > >>> I am not sure whether I understand the backwards compatibility page > >>> correctly > >>> > >>> https://cwiki.apache.org/confluence/display/LUCENE/BackwardsCompatibility > >>> > >>> > >>> but I guess version 9 will not be backwards compatible to version 8? Or > >>> should I do something different? > >>> > >>> Thanks > >>> > >>> Michael > >>> > >>> --------------------------------------------------------------------- > >>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > >>> For additional commands, e-mail: java-user-h...@lucene.apache.org > >>> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > >> For additional commands, e-mail: java-user-h...@lucene.apache.org > >> > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > > For additional commands, e-mail: java-user-h...@lucene.apache.org > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
