Problem
Several issues when accessing shares and additional warnings about DNS Updates through kerberos. Your users might not be able to connect to shares or access them while on other shares the permissions seems to be ignored.
Additionally you see a warning in UMC similar to the one from this article.
Solution
Make sure your root- filesystem is not run out of disk space:
root@ucs:/etc/ssh# df -h
Dateisystem Größe Benutzt Verf. Verw% Eingehängt auf
udev 10M 0 10M 0% /dev
tmpfs 401M 22M 380M 6% /run
/dev/mapper/vg_ucs-root 29G 28G 0 100% /
tmpfs 1003M 0 1003M 0% /dev/shm
tmpfs 5,0M 0 5,0M 0% /run/lock
tmpfs 1003M 0 1003M 0% /sys/fs/cgroup
/dev/sda1 472M 64M 385M 15% /boot
Move data to a different location to free up space for “/” and create a separate disk for your data so / will not get filled up when data is written.