Jenkins Upgrade from 1.651.3 to 2.7.4

Hi all, I'm going to upgrade my Jenkins server and having hard times to find a detailed upgrade guide. Especially I wonder when moving to Jenkins 2.x *how to make sure the jobs will remain intact, we have many complex jobs.* Any resource will be helpful. Thanks! -- You received this message bec

Launching build with parameters from CLI

When I trying to run build job from CLI with parameters to plugins I get the following error: c:\Jenkins>java -jar jenkins-cli.jar -s %JENKINS_URL% build "CCBL_Test" -p "PROJECTS=Test1,Test2" CLI parameter submission is not supported for the class com.cwctravel.hudson.plugins.extended_choice_parame