Currently FindBugs is simply disabled on the whole plugin. There are many violations:
[INFO] --- findbugs-maven-plugin:3.0.5:check (findbugs) @ ec2 --- [INFO] BugInstance size is 87 [INFO] Error size is 0 [INFO] Total bugs: 87
Those should likely be fixed. Even more if we use in the core list of plugins for Jenkins Essentials.
cc R. Tyler Croy FYI
In 1.44 there are no more findbugs/spotbugs violations