Running Redhat 6.0/6.1 with xntp3-5.93-13 (rpm version) and out of the blue it just dies. If you run a status, it says its dead but the subsystem is locked.
The ntp.conf file is extremely simple simply listing the time server and leaving the default info alone.
When it dies like this, the only way I have found to get it to run again in to remove it, and reinstall it. Nothing else seems to fix it. Even then, only for a short time....and it dies again.
I have amix of 6.0 and 6.1 systems, it seems to have doen this on each one at one given time, randomly and then stopped for most.. but continues on a few.