runtime jdk requirement of java client (via mvnd.sh) should be aligned to JDK8

[gzm55]

Now java client (via mvnd.sh) requires JDK11, different with native mvnd and the embedded maven 3.8.5. This makes the user surprising in some production environments.

• Native mvnd: requires JDK8
• maven 3.8.5: requires JDK8
• mvnd.sh: requires JDK11 ?

[ppalaga]

• Native mvnd: requires JDK8

Well, strictly speaking, mvnd is a native executable not requiring any JRE to run. A VM (called Substrate) is embedded. The daemon started by that executable is fine with Java 8.

• maven 3.8.5: requires JDK8
• mvnd.sh: requires JDK11 ?

Yes, this is by design. The client requires some features not available in Java 8.

If you are on Mac M1 and you want to overcome this limitation, you may want to compile mvnd yourself following @orpiske 's script https://www.orpiske.net/2022/07/try-apache-maven-daemon/

We actually had a similar question before. Here is a dirty hack I recommended at that time: #547 (comment)

[ppalaga]

Maybe we should document the limitation in README.

[gnodet]

I think this issue can now be closed with the merge of #717 and #722.