Which JDK recommended for WildFly 12?

[mylos78]

Hi all!

I have seen the release notes of WildFly 12 specify "Java 9 compatibilty has been improved". I wonder if Java 9 should be the preferred way to run the application server or it's recommended to use Java 8 still ?

Thanks

Mylos

[ctomc]

Both should run fine.

But keep in mind, that even if you are running on JDK9, you wont be able to use jigsaw modularity in your deployed application.

JDK 9 / 10 support in WildFly is currently limited to running in classpath mode.

But in any case I would go for JDK9 as it bring so many new features and performance enhancements.

If you find any issues  running on JDK 9/10 please let us know, but as of now, don't know of any big ones.

[marcial.atienzar]

It has a problem when using JDK9. You can see this post:

Re: Problem migration from WF10 to WF12: NPE on EJB injection on Servlet

And this issue:

[WFLY-9961] [JDK9+] @WebListener and Spring WebApplicationInitializer not working (JDK8 OK!) - JBoss Issue Tracker