thanks for the response
>I feel doubt about the conclusion that "don't try to load a savepoint from a Java 8/11/17 build due to bumping to scala-2.12.18", since the snapshotted state (operator/keyed state-backend), and most key/value serializer snapshots are generated by pure-java code. >The only left part is that the developer uses scala UDF or scala types for key/value types. However, since all user-facing scala APIs have been deprecated, I don't think we have so many cases. Maybe we can give descriptions without such strong suggestions. That is the area where I feel I lack the knowledge to answer this precisely. My assumption was that statement about Java 21 regarding this should be similar to Java 17 which is almost same [1] Sorry for the inaccuracy Based on your statements I agree that the conclusion could be more relaxed. I'm curious whether there are some tests or anything which could clarify this? [1] https://lists.apache.org/thread/mz0m6wqjmqy8htob3w4469pjbg9305do On Wed, Nov 29, 2023 at 12:25 PM Yun Tang <myas...@live.com> wrote: > Thanks Sergey for the great work. > > I feel doubt about the conclusion that "don't try to load a savepoint from > a Java 8/11/17 build due to bummping to scala-2.12.18", since the > snapshotted state (operator/keyed state-backend), and most key/value > serializer snapshots are generated by pure-java code. The only left part is > that the developer uses scala UDF or scala types for key/value types. > However, since all user-facing scala APIs have been deprecated [1], I don't > think we have so many cases. Maybe we can give descriptions without such > strong suggestions. > > Please correct me if I am wrong. > > > [1] https://issues.apache.org/jira/browse/FLINK-29740 > > Best > Yun Tang > > ________________________________ > From: Rui Fan <1996fan...@gmail.com> > Sent: Wednesday, November 29, 2023 16:43 > To: dev@flink.apache.org <dev@flink.apache.org> > Subject: Re: [ANNOUNCE] Experimental Java 21 support now available on > master > > Thanks Sergey for the great work! > > Best, > Rui > > On Wed, Nov 29, 2023 at 4:42 PM Leonard Xu <xbjt...@gmail.com> wrote: > > > Cool ! > > > > Thanks Sergey for the great effort and all involved. > > > > > > Best, > > Leonard > > > > > 2023年11月29日 下午4:31，Swapnal Varma <swapnal...@gmail.com> 写道： > > > > > > Congratulations Sergey, and everyone involved! > > > > > > Excited to work with and on this! > > > > > > Best, > > > Swapnal > > > > > > > > > On Wed, 29 Nov 2023, 13:58 Sergey Nuyanzin, <snuyan...@gmail.com> > wrote: > > > > > >> The master branch now builds and runs with Java 21 out-of-the-box. > > >> > > >> Notes: > > >> - a nightly cron build was set up. > > >> - In Java 21 builds, Scala is being bumped to 2.12.18 > > >> which causes incompatibilities within Flink; > > >> i.e. don't try to load a savepoint from a Java 8/11/17 build > > >> - All the tests that are being skipped on Java 11/17 > > >> are also skipped on Java 21. > > >> > > >> Huge shout-out to everyone participating > > >> in review of my Java 21 related PRs > > >> > > >> If you run into any issues, please report it in FLINK-33163 > > >> <https://issues.apache.org/jira/browse/FLINK-33163> . > > >> > > >> -- > > >> Best regards, > > >> Sergey > > >> > > > > > -- Best regards, Sergey
