UM site had IPv6 issues after the hardware maintenance from Merit, we had to put the UM condor cluster offline to prevent failing more jobs. The issue was resolved the next day by Merit. 

We found out a  condor ce sub directory  ownership issue on the condor-ce which had been causing 20% SAM test jobs fail(Site has only75% Reliability and Availabilty in May). That ownership issue was introduced in late April when we were trying to fix the ownership for the gratia directories.