Problem:
Sysvol-Replikation is not working anymore.
With the update to 5.2 in some edge cases, the sysvol replication is not working anymore.
Solution:
This is because of a schoolserver was set or has set himself as owner of /var/lock/sysvol-sync-dir on the primary.
root@master:~# ls -lah /var/lock/sysvol-sync-dir
-rw-rw-r-- 1 SchulSl1$ DC Slave Hosts 0 21. Okt 11:05 /var/lock/sysvol-sync-dir # → Problematisch
root@master:~# chown root:'DC Slave Hosts' /var/lock/sysvol-sync-dir # → Lösung
root@master:~# ls -lah /var/lock/sysvol-sync-dir
-rw-rw-r-- 1 root DC Slave Hosts 0 21. Okt 11:05 /var/lock/sysvol-sync-dir
See also Bug 58784