I haven't followed this discussion closely, but I think we could/should drop Java 8 in Spark 4.0, which is up next after 3.5?
On Tue, Jun 6, 2023 at 2:44 PM David Li <lidav...@apache.org> wrote: > Hello Spark developers, > > I'm from the Apache Arrow project. We've discussed Java version support > [1], and crucially, whether to continue supporting Java 8 or not. As Spark > is a big user of Arrow in Java, I was curious what Spark's policy here was. > > If Spark intends to stay on Java 8, for instance, we may also want to stay > on Java 8 or otherwise provide some supported version of Arrow for Java 8. > > We've seen dependencies dropping or planning to drop support. gRPC may > drop Java 8 at any time [2], possibly this September [3], which may affect > Spark (due to Spark Connect). And today we saw that Arrow had issues > running tests with Mockito on Java 20, but we couldn't update Mockito since > it had dropped Java 8 support. (We pinned the JDK version in that CI > pipeline for now.) > > So at least, I am curious if Arrow could start the long process of > migrating Java versions without impacting Spark, or if we should continue > to cooperate. Arrow Java doesn't see quite so much activity these days, so > it's not quite critical, but it's possible that these dependency issues > will start to affect us more soon. And looking forward, Java is working on > APIs that should also allow us to ditch the --add-opens flag requirement > too. > > [1]: https://lists.apache.org/thread/phpgpydtt3yrgnncdyv4qdq1gf02s0yj > [2]: > https://github.com/grpc/proposal/blob/master/P5-jdk-version-support.md > [3]: https://github.com/grpc/grpc-java/issues/9386 >
