NTP goes into maintenance mode: /sbin/sh: /lib/svc/method/xntp: not found

After live upgrading to Solaris Express Community Edition build 116, at the first reboot, I noticed that the NTP service had gone into maintenance mode:

# svcs -xv
svc:/network/ntp:default (Network Time Protocol (NTP) Version 4)
State: maintenance since June 20, 2009 12:44:33 AM CEST
Reason: Start method failed repeatedly, last exited with status 1.
See: http://sun.com/msg/SMF-8000-KS
See: man -M /usr/share/man -s 1M ntpq
See: man -M /usr/share/man -s 1M ntpd
See: man -M /usr/share/man -s 4 ntp.conf
See: /var/svc/log/network-ntp:default.log
Impact: This service is not running.

and the log file clearly showed me the problem:

# tail /var/svc/log/network-ntp\:default.log
[ Jun 20 00:44:32 Executing start method ("/lib/svc/method/xntp"). ]
/sbin/sh: /lib/svc/method/xntp: not found
[ Jun 20 00:44:33 Method "start" exited with status 1. ]
[ Jun 20 00:44:33 Executing start method ("/lib/svc/method/xntp"). ]
/sbin/sh: /lib/svc/method/xntp: not found
[ Jun 20 00:44:33 Method "start" exited with status 1. ]
[ Jun 20 00:44:33 Executing start method ("/lib/svc/method/xntp"). ]
/sbin/sh: /lib/svc/method/xntp: not found
[ Jun 20 00:44:33 Method "start" exited with status 1. ]
[ Jun 20 00:44:43 Rereading configuration. ]

I checked and xntp isn't there. This is related to Solaris switching to NTP version 4: if you just live upgraded to build 116 don't worry. That's indeed a glitch during the first reboot and SMF should have updated the ntp service's manifest during the boot: you won't see that message anymore.