Nagios Support Forum

We have a problem applying changes to the configuration after upgrade. We are getting
An error occurred while attempting to apply your configuration to Nagios Core. Monitoring engine configuration files have been rolled back to their last known good checkpoint.

The snapshot is not showing any error we can trace for today
When I tried tool-write config files- write monitoring data/check config i dont see any error
Can you help to troubleshoot?

Did you try rebooting the Nagios server after the upgrade?
Normally, you don't have to reboot it, but if you experience any "weird" behavior, we recommend that you reboot the server first.

http://assets.nagios.com/downloads/nagi ... ctions.pdf

Hope this helps!

reboot fixed the issue
Thanks

Great! Thanks for the feedback!