Upgrading to 1.580.2.1 does not start.
Caused by: java.lang.NoClassDefFoundError: Lorg/eclipse/jgit/http/server/GitServlet;
As of 1.580.x.y, CloudBees Jenkins Enterprise is packaged with the Workflow Plugin (Pipeline Plugin). The Workflow Plugin (Pipeline Plugin) has a dependency on the following plugins:
Please make sure that these plugins are enabled by going to $JENKINS_HOME/plugins and making sure the *.hpi.disabled have been removed for the plugins listed above.
If they are not there, you can get them from the link below: https://jenkins-updates.cloudbees.com/download/plugins/.
If the plugins are installed and enabled, then delete the git plugins folder:
As the plugins could contain corrupt data from extracting the files.