We are introducing a change in JDK/JRE packages of our distro. This istriggered from the way a JRE is build in modern versions of Java (>9). We areintroducing this change in Java 21.

To sum it up instead of having JDK and JRE packages coexist in the same systemwe will be making them conflict. The JDK variant package includes the runtimeenvironment to execute Java applications so if one needs compilation andruntime of Java they need only the JDK package in the future. If, on the otherhand, they need just runtime of Java then JRE (or jre-headless) will work.

This will (potentially) require a manual user action during upgrade:

• If you have both JDK and JRE installed you can manually install the JDKwith pacman -Sy jdk-openjdk && pacman -Su and this removes the JRE related packages.
• If you have both JRE and JRE-headless you will need to choose one ofthem and install it manually since they would conflict each other now.
• If you only have one of the JDK/JRE/JRE-headless pacman should resolvedependencies normally and no action is needed.

At the moment this is only valid for the upcoming JDK 21 release, with other versions to follow.