I am not very familiar with Jenkins myself and can´t find a solution. I updated my Jenkins and plugins normally and i got a problem (maybe with p4). p4 plugin version 1.7.4 works pretty well but sooner or later i want my Jenkins and plugins on a new version . I can´t test p4 plugin 1.7.5 - 1.7.9 myself. Just ask me when u want to know anything