NPE may happen if somebody tries to drop the e-mail JenkinsLocationConfiguration:setAdminAddress()
Build History badges don't wrap
Deadlock between Queue.maintain and Executor.interrupt
Jenkins queue self-locking without apparent reason?
Deadlock in hudson.model.Executor
UnlabeledLoad.computeQueueLength() includes labeled jobs
Job loading can be broken by a NPE in a build trigger
post-build action statuses handling