When running maven commands (mvn), Java will download lots of stuff and the download progress messages are printed to stdout.  This is fine in a Terminal but on Jenkins, this progress is printed out across hundreds and hundreds of separate lines.  This makes parsing the console output very difficult. 

As such, please add the --no-transfer-progress flag to all mvn commands.

https://maven.apache.org/ref/3.6.1/maven-embedder/cli.html

This includes the salgenerator and running the Java units in the Jenkinsfile.  There may be other instances, but I don't know for sure.