NTP jitter (not parsed) breaks check_ntp?

[John Christian]

It seems this problem was related to the nagios or
perl files on the monitoring server itself and not
NTP. Maybe they were corrupted as a result of the
power outage.

I can't say I found a solution to the problem, but I
was able to make the problem go away. With patience
getting short, I changed 3 things at once while
troubleshooting. As a result, I don't know excatly
which change eliminated my problem. I upgraded to the
latest perl distribution and recompiled nagios without
using the embedded perl option.

Now everything works like normal again.

-John



Original message:
 Hello,
 
 My, ummm, friend's data center lost power this
 weekend. All servers came back up, but now it seems
 that check_ntp is not working properly. The NTP
 service detail for some hosts is fine (green) but
most
 NTP services are state pending (grey). They have
 remained state pending for 3+ days.
 
 Running check_ntp manually reveals:
 
 foo:/usr/local/nagios/libexec # ./check_ntp -H
 hostgreen NTP OK: Offset -0.000513 secs, jitter 1.74
 msec, peer is stratum 3|offset=-0.000513,
 jitter=0.00174,peer_stratum=3
 
 foo:/usr/local/nagios/libexec # ./check_ntp -H
 hostgrey
 Argument "(not parsed)" isn't numeric in abs at
 ./check_ntp line 401.
 NTP OK: Offset -0.000141 secs, jitter (not parsed)
 msec, peer is stratum 2|offset=-0.000141,
 jitter=0,peer_stratum=2
 
 check_ntp (nagios-plugins 1.4.1) 1.29
 Nagios 2.0b4
 Solaris 9
 
 The NTP daemons are running on all hosts and are in
 sync. I suspect the problem is related to the
 check_ntp script not handling the "jitter (not
 parsed)" feedback properly.
 
 I've tried restarting the ntp daemons and restarting
 nagios, but it didn't help.
 
 BTW: For the NTP services that are in the grey
pending
 state, it appears they become ignored because the
next
 scheduled service check never changes. I can force a
 manual check -which updates the next scheduled check-
 but it stays grey and no additional checks are
 auto-scheduled.
 
 How do I get my NTP clients to parse some jitter? Or,
 how else should I fix this problem? TIA!
 -John
 

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