... should *reindex* ( not update ) On Thu, May 27, 2021 at 10:39 AM Michael Sokolov <msoko...@gmail.com> wrote: > > 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 > >
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