I am running client 2.1.16 under Sierra 10.12.16 on a MacBook Pro.
I just noticed this in my system log.
Sep 27 13:45:27 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend[980]): Service exited with abnormal code: 30
Sep 27 13:45:27 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Sep 27 13:45:37 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend[983]): Service exited with abnormal code: 30
Sep 27 13:45:37 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Sep 27 13:45:47 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend[993]): Service exited with abnormal code: 30
Sep 27 13:45:47 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Sep 27 13:45:57 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend[999]): Service exited with abnormal code: 30
Sep 27 13:45:57 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Sep 27 13:46:00 Glenns-MacBook-Pro Console[929]: BUG in libdispatch client: kevent[EVFILT_MACHPORT] monitored resource vanished before the source cancel handler was invoked
Sep 27 13:46:07 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend[1005]): Service exited with abnormal code: 30
Sep 27 13:46:07 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Sep 27 13:46:17 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend[1015]): Service exited with abnormal code: 30
Sep 27 13:46:17 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Note. The backup is running fine and the GUI seems to function without issue.
Glenn
I updated to client 2.2.2 and it seems to have stopped with;
Sep 27 13:51:56 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.frontend.8128[472]): Service exited due to signal: Terminated: 15 sent by killall[1338]
Sep 27 13:51:57 Glenns-MacBook-Pro com.apple.xpc.launchd[1] (org.urbackup.client.backend): This service is defined to be constantly running and is inherently inefficient.