[Check_mk (english)] Incorrect Offset Warnings from System Time Service

Andreas Döhler andreas.doehler at gmail.com
Tue Feb 10 18:37:20 CET 2015

Hi Rob,

Check_MK compares the time stamp with his own time. Take a look at all your
systemtime checks at the same time with the quicksearch function.
If there are all windows times the same amount off then you have a problem
with timesync between your Unix and Windows infrastructure :)

Best regards

Dye, Rob <rdye at scires.com> schrieb am Tue Feb 10 2015 at 17:55:21:

>  I’m new to Check_MK and I’m trying to troubleshoot an issue with a false
> warning state.  Check_mk is reporting something similar to:  “WARN – Offset
> is -64 sec”.  It seems to only happen on windows clients (we have 8 windows
> systems and 30 linux systems) but it varies from day to day which
> machine(s) are showing this alert.  In reality, the timestamps only vary by
> a second or two across the windows machines, but check_mk reports up to 70
> seconds offset.  The check_mk/OMD server is about 20 seconds offset from
> the windows servers.
> If I ssh into the server and run a “nc <serverIP> 6556” I can see the
> <<<systemtime>>> output at the bottom.  The time it reports is correct, so
> I believe the issue is on the server rather than the client end.
> What is check_mk doing with this systemtime information to result in the
> warning that the time is 60-70 seconds offset and how can I fix it?
> Thanks for your help!
> *Rob D*
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