[lyo-dev] Apache Jena is migrating to JDK 11

[Andrii Berezovskyi <andriib@xxxxxx>]

Hi,

Jena has migrated to Java 11 in the latest SNAPSHOT, I believe the main cause is that the new JSON-LD 1.1 library is JDK11+ (full thread: https://markmail.org/message/plhgjoci4txzyowf). We should ask them to reconsider, or ask them to backport security fixes to old versions (unlikely w/o financial support). Aside of that, we shall start considering a move of Lyo to JDK 11 ourselves. 

If anyone is ready to step up and offer financial support to Jena to keep the security fixes applied to an older version of Jena, please speak up. Otherwise I recommend you add a test matrix like this one to your builds: https://github.com/oslc-op/refimpl/blob/master/.github/workflows/maven.yml#L20  I think it's fairly safe to say Lyo 5.x will be JDK 11+ compatible because we are not planning to fork and maintain our dependencies that are moving to JDK 11 (we already build RefImpl on JDK 8, 11, 15, 16ea, 17ea without problems https://github.com/oslc-op/refimpl/actions/runs/476842056).

--
Cheers,
Andrew

Begin forwarded message:

From: Andy Seaborne <andy@xxxxxxxxxx>

Subject: Re: Java 8 or 11?

Date: 8 January 2021 at 23:45:12 CET

To: "users@xxxxxxxxxxxxxxx" <users@xxxxxxxxxxxxxxx>

Reply-To: <users@xxxxxxxxxxxxxxx>

The Jena build has been switched to produce Java11 bytecode.

Nothing else in the codebase has been changed so this is easily reversible at the moment.

Using SNAPSHOT artifacts will get you Java11 bytecode.

There is currently some problems producing javadoc

One problem is [1] on early Java11 releases (11.0.1, 11.0.2, but not the GA release 11.0.0). Update-to-date Java11 is now 11.0.9 and works

Another is overlapping packages across modules using automatic module naming.

These do not affect the running of Jena.

   Andy

[1] https://bugs.openjdk.java.net/browse/JDK-8212233