The TSSW Jenkins agent went offline sometime overnight when the 50GB disk space alert triggered.
Disk space is too low. Only 51.141GB left on /j.
CLONE - TSSW Jenkins executor is offline
TSSW jenkins impliement automatic job workspace purging
I brought the agent back online, in order to continue testing, but the disk space issue still exists.
The workspaces on the el7-1 agent have been cleaned up and this node is back online.