Comment 12 for bug 1662813

I'm trying to run Jenkins installed from the official Jenkins repository.

SO far no Jenkins installation has worked out of the box and my mention that I can install a fresh system was an offering to you to replay the installation and make sure that no changes remain and I have the full installation trace.

Here is what I did on a fresh 18.04 system(copy from https://jenkins.io/doc/book/installing/#debian-ubuntu):

apt install openjdk-8-jre-headless
apt install libjna-java

wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -
sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'
sudo apt-get update
sudo apt-get install jenkins

After installation and initial configuration the url

http://xxx:8080/restart

will give the following message:
Jenkins cannot restart itself as currently configured.

If the following link is added, everything works:

/usr/lib/s390x-linux-gnu/libjnidispatch.so -> /usr/lib/s390x-linux-gnu/jni/libjnidispatch.system.so

It is important to note that some/most parts of jna can still work with jni being unavailable, it is only required for some of the functionality.

Similar issues (with a different program) have been discussed here: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=858876