Jenkins is not starting up during the course of upgrade from version 2.471 to 2.489 due to failure of initialization of Scriptler plugin. Scriptler was upgraded from : 363.vd97ef616cb_f9 to 392.va_dce718b_3e40.

Below are the steps which was observed during the crash of the Jenkins.

1. INFO jenkins.InitReactorRunner$1#onAttained: Prepared all plugins
2. INFO    o.j.p.s.ScriptlerLoadingTasks#synchronizeConfig: initialize Scriptler
3. INFO    jenkins.InitReactorRunner$1#onAttained: Started all plugins
4. SEVERE    jenkins.InitReactorRunner$1#onTaskFailed: Failed ScriptlerLoadingTasks.synchronizeConfig
5. SEVERE    hudson.util.BootFailure#publish: Failed to initialize Jenkins
6. INFO    hudson.lifecycle.Lifecycle#onStatusUpdate: Stopping Jenkins

We disabled the Scriptler plugin by creating a file named scriptler.jpi.disabled under location: mnt/jenkins_home/plugins and pinned Scriptler to previous stable version of 363.vd97ef616cb_f9.

After disabling, Jenkins was able to start.