> > - As a low level library, users have to add specific flags to use > Java 9 and up with Arrow to resolve issues with java.nio. This has > been annoying for our customers constantly. If this is not resolved, > I would say we may see a lot of complaints in the future. > I filed issue 37739[1] to track this, but it sounds like this can't be changed until Java 21 or 24.
- It seems that the EOL of Java 8 from Oracle is Dec 2030 [2]. A lot > users will still stay on it for a long time. At least this is true for our > customers. So I am afraid we may not upgrade to newer versions > of Arrow if it no longer supports Java 8. > Java 8 does have a long Extended Support timeline, but a recent report shows Java 11 increasing in adoption vs Java 8. "More than 56% of applications are now using Java 11 in production (up from 48% in 2022 and 11% in 2020). Java 8 is a close second with nearly 33% of applications using it in production (down from 46% in 2022)."[2] I expect the Java ecosystem will find a way to move on from Java 8 much sooner than 2030, meaning many of Arrow's dependencies could drop support for Java 8 before then. At this point, Arrow may be forced to support a higher minimum Java version. That being said, it's hard to argue against real use cases. I'd be curious to hear what Java version other users of Arrow are using (and if there is a timeline to upgrade if on Java 8). [1]https://github.com/apache/arrow/issues/37739 [2] https://newrelic.com/sites/default/files/2023-04/new-relic-2023-state-of-the-java-ecosystem-2023-04-20.pdf -Dane On Thu, Sep 14, 2023 at 11:45 AM Gang Wu <ust...@gmail.com> wrote: > Thanks for bringing this up! > > I have two concerns of dropping Java 8 support: > - As a low level library, users have to add specific flags [1] to use > Java 9 and up with Arrow to resolve issues with java.nio. This has > been annoying for our customers constantly. If this is not resolved, > I would say we may see a lot of complaints in the future. > - It seems that the EOL of Java 8 from Oracle is Dec 2030 [2]. A lot > users will still stay on it for a long time. At least this is true for our > customers. So I am afraid we may not upgrade to newer versions > of Arrow if it no longer supports Java 8. > > [1] https://arrow.apache.org/docs/java/install.html#java-compatibility > [2] https://www.oracle.com/java/technologies/java-se-support-roadmap.html > > Best, > Gang > > > > On Thu, Sep 14, 2023 at 11:14 PM David Dali Susanibar Arce < > davi.sar...@gmail.com> wrote: > > > Hi Arrow Java developers, > > > > I would like to propose a timeline for dropping support for Java 8: > > - Propose to drop JDK8 in Arrow v15 (2 releases from now) > > - JDK 21 support will be added before removal of JDK8 > > > > Why? > > - Java 8 no longer receives Premier Support (1) > > - Some Arrow Java (test) dependencies have already started to drop > > Java 8 support, forcing us to pin to older packager versions > > > > Also note: > > - gRPC Java may drop support for a JDK version when that version is no > > longer receiving Premier Support from Oracle (2), more detail at Java > > 8 / Java 11 support timeline in gRPC here (3) > > - Spark plans to tentatively drop JDK 8 support in Spark 4.0 (4), > > which has a release timeline of approximately 2024-06 (5). Is it fine > > for us to drop JDK 8 support before spark? > > > > (1) > https://www.oracle.com/java/technologies/java-se-support-roadmap.html > > (2) > > > https://github.com/grpc/proposal/pull/283/files#:~:text=gRPC%20Java%20may,support%5D > > . > > (3) https://groups.google.com/g/grpc-io/c/-XK6Kd_19YQ/m/-4s07TzdAgAJ > > (4) https://issues.apache.org/jira/browse/SPARK-44112 > > (5) https://www.mail-archive.com/dev@spark.apache.org/msg30460.html > > > > Consider: > > - JDK8 deprecation is currently not mandatory. We simply want to > > devote more time to development of Java LTS versions 11, 17 and 21. > > - Java 11 is dropping Premier Support this month. > > > > Best regards, > > > > -- > > David Susanibar > > >
