We have 3 netware 6.5 servers - one is master, second one read write and the third one is read only replica. We recently are having time sync issue. On the master one we are syncing with an external server. However after loading XNTPD it crashes after a few minutes. On the other two servers XNTPD is always running which are supposed to sync time from the master server. Any idea?

Recently the third server was recently migrated from one ESX to Another ESX and the problem pretty much started from that time - we had a similar issue a few weeks ago any time which was solved by manually settings the time on the third server. The other 2 server are physical servers. But this does not explain why on the physical master XNTPD crashes.
Any idea?