offline jenkins slaves

Hi, can you please check why these slaves are offline and get them up and running? http://jenkins.ovirt.org/computer/fedora19-host01-rackspace/ http://jenkins.ovirt.org/computer/jenkins-slave-host03.ovirt.org/ http://jenkins.ovirt.org/computer/jenkins-slave-host06.ovirt.org/ http://jenkins.ovirt.org/computer/os1-rhel6-vm01/ We have 38 jobs in queue on jenkins. thanks, -- Sandro Bonazzola Better technology. Faster innovation. Powered by community collaboration. See how it works at redhat.com