jvm

We use sbt-dynver to set the version for the Play project based on git tags.
E.g. when you run sbt in the Play project folder you will see:

// If you haven't you need to get the Play framework source code
git clone git@github.com:playframework/playframework.git
cd ./playframework

// You are in the master branch now, from which we want to rele

Trying to get my Selenium WebDriver testcontainer up, I get the following error when I try to get the host's port using getTestHostIpAddress():

Caused by: java.lang.UnsupportedOperationException: getTestHostIpAddress() is only implemented for docker-machine right now

I am running this on Ubuntu 20.04

Any ideas?

Motivation

Current, if we try to run a more recent Java class in an old JVM, we get the following error message:

Error: LinkageError occurred while loading main class some.Class
	java.lang.UnsupportedClassVersionError: JVMCFRE003 bad major version; class=some/Class, offset=6

However, it is not so easily to detect that the class was compiled with a version above the supported by the JVM.Hotspot