I upgraded a production server from Ubuntu 15.04 to a fresh install of 16.04 LTS. running luminous It is a brand new OS. I installed it I think almost identical to numerous other test OSDs servers that are running. This one system is spitting out an error "Unhandled exception in thread started by" and then there is no other output after. The only other change I made different is remove systemd from one of them due to ceph complaints. I get this error when executing ceph-deploy admin. right after the "write cluster configuration to /etc/ceph{cluster}.conf" output I'm not sure how to trace it further. Googling shows it generally has been a bug with some python code. it seems to say it is a bug but Bug#8509 and #9248 are slightly different. -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html