Now that Java 15 is the latest release and Java 16-ea is available, we should upgrade that on our Jenkins server (I see somebody reduced the number of versions, we shouldn't do that!)
However, as long as we don't have our builds stable, we can't be sure if the Java upgrade has a negative effect on these builds.
I thought I'd checked it a week ago and it really looks like we have new failing projects.
Please keep checking Jenkins when committing or merging to master.
AFAIK maven-source-plugin is running too fast, exposing a bug in Linux+Java8, fix is ready in plexus-archiver.
Wagon was failing on Windows due to long paths, now it is failing on Linux!?