I'm not amused by #openjdk these days.
maven won't deploy with java-11 because
> javadoc: error - The code being documented uses modules but the packages defined in http://docs.oracle.com/javase/7/docs/api/ are in the unnamed module.
and it won't deploy with java-8, because
> Execution default-test of goal XXX failed: The forked VM terminated without saying properly goodbye. VM crash or System.exit called ?
java-7 can't be installed because of dependency issues
and that's again when the hacking starts... 🤦
@martin To me, this looks like a hint that you should upgrade your dependencies, e.g. Java SE too.
I'm upgrading our project to Java 11 too atm and at least I can build & run it again by now. 🙈
@Aarkon well java 11 is the current version, isn't it? but my issue is actually a bug in openjdk 11+ https://bugs.openjdk.java.net/browse/JDK-8212233
Their workaround is to pollute the pom to use java-8 for javadoc (and java-11 for the rest). But... no. 
My workaround is to replace the javadoc binary in java-11 with a link to the binary in java-8:
/usr/lib/jvm/java-11-openjdk-amd64/bin/javadoc -> /usr/lib/jvm/java-8-openjdk-amd64/bin/javado
and wait until their official fix drips down to my setup...
@martin Oh, too bad! But your "fix" looks looks nice, and a lot cleaner than mixing project configuration with treatment of issues in external binaries!