On Sat, Jun 29, 2013 at 04:01:55PM +0200, Holger Weiß wrote: > JFTR: > * Marc Haber <mh+nagios-us...@zugschlus.de> [2013-06-26 21:22]: > > I have a system running Debian oldstable with Nagios-Plugins 1.4.15. A > > few weeks ago, my check_ntp_peer checks have started acting up: > > > > $ /usr/lib/nagios/plugins/check_ntp_peer --hostname=2001:1b18:f:4::2 > > --warning 3 --critical 5 --jwarn 10 --jcrit 20 --twarn 2: --tcrit 3: > > --swarn 2 --scrit 2 -v > > 3 candidate peers available > > synchronization source found > > Getting offset, jitter and stratum for peer e20a > > parsing offset from peer e20a: error: unable to read server offset response. > > parsing jitter from peer e20a: error: unable to read server > > jitter/dispersion response. > > parsing stratum from peer e20a: error: unable to read server stratum > > response. > > NTP CRITICAL: Offset unknown, jitter=-1,000000, stratum=-1, truechimers=6| > > jitter=-1,000000;10,000000;20,000000;0,000000 stratum=-1;2;2;0;16 > > truechimers=6;0;0;0 > > This is probably caused by a bug in Force10 switches mentioned here: > > http://news.ntppool.org/2013/06/ipv6-monitoring-problems-for-g.html > > Due to that bug, the check_ntp_peer requests got duplicated on their way > to the server, and the server therefore sent multiple responses per > request. check_ntp_peer then stumbled over those duplicated responses. > That's a bug, I'll fix it later today. > > Thanks to Marc for providing tcpdump output and for his help with > tracking the issue down.
This was really fun to investigate. Thanks for help ans inspiration. Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 31958061 Nordisch by Nature | How to make an American Quilt | Fax: *49 621 31958062 ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
