I just noticed that our ns2 (mirror of ns1) has not sync'ed with ns1 in a over a week. When I do manual sync from ISPconfig tools I can see it on the Monitor queue list and it seems to run successfully but nothing ends up in the cluster "master" sys_datalog. Both ns1 and ns2 sys_datalog is empty. If I update any ttl value on ns1 it will not sync to ns2. Any ideas how to start debuging this?