JAXB & java.mail Java 11: Module problems - jaxb

Question

When I converted an application, that uses jaxb & java.mail, from java 8 to java 11 I had lots of module problems that seemed intractable.
My build.gradle included:
compile group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.1'
compile group: 'javax.mail', name: 'mail', version: '1.4.7'
The module errors I got included:
the unnamed module reads package javax.activation from both java.activation and activation
I tried this but it didn't work with the same error:
compile (group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.1') {
exclude group: 'javax.activation', module: 'activation'
}
compile group: 'javax.mail', name: 'mail', version: '1.4.7'
And I tried this which also failed:
compile group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.1'
compile (group: 'javax.mail', name: 'mail', version: '1.4.7') {
exclude group: 'javax.activation', module: 'activation'
}
The error was:
java.lang.ClassNotFoundException: com.sun.xml.internal.bind.v2.ContextFactory
Also tried using in gradle with various exclude statements that all failed one way or another:
compile (group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.1')
compile (group: 'com.sun.xml.bind', name: 'jaxb-core', version: '2.3.0.1')
compile (group: 'com.sun.xml.bind', name: 'jaxb-impl', version: '2.3.0.1')
Also got runtime error:
class not found com.sun.activation.registries.LogSupport

Answer 1

Solution
In the end I found that using glassfish.jaxb and jakarta.mail worked.
My build.gradle included:
compile(group: 'org.glassfish.jaxb', name: 'jaxb-runtime', version: '2.3.2') {
exclude group: 'jakarta.activation', module: 'jakarta.activation-api'
}
compile group: 'com.sun.mail', name: 'jakarta.mail', version: '1.6.5'
My module-info.java included:
requires java.xml.bind;
requires jakarta.mail;
requires com.sun.xml.bind; // needed this for jlink
Hope this helps.