Nagios Support Forum

After having updated Nagios from 5.6.14 to 5.7.4, all was looking fine until I realized the alarms of hosts and services are not updated any more in xi GUI. I am presented by the last status before the update forever. In Nagios core, all is presented correctly. In addition, the notifications are sent out correct. However, xi GUI is outdated, what is quite dangerous.
After a long day of troubleshooting, I was able to find out, some more details:

• The problem does not start directly after the upgrade. It starts after rebooting the whole server OS (CentOS 7) after the Nagios update.

• After each server reboot I find this entries in the nagios.log:

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  [1605109792] NDO-3: NDO 3.0.4 (c) Copyright 2009-2020 Nagios - Nagios Core Development Team
  [1605109792] NDO-3: Unable to connect to mysql. Check your configuration
  [1605109792] NDO-3: NDO was not able to initialize the database (main context) and will not start.

• When performing just a

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  /etc/init.d/nagios restart

  after the server reboot, all is working fine again and in the log I can see NDO-3 is able to connect to the mysql DB without a problem

• I have checked the startup of the MariaDB and compared the timestamps. The timestamp when MariaDB is reporting Started MariaDB database server. is always about 2 seconds later than NDO-3 is trying to connect.

I have already opened a support case for that, and asked, if I should do the downgrade of NDO as described by ssax in this forum topic https://support.nagios.com/forum/viewto ... do#p319171. But I do not get really a confirmation of an known issue from the support guy. He is just telling me, I can give it a try. I am wondering if I am the only one with this issue or if xi really has serious troubles with NDO-3. If I am the only one with this issue of NDO-3 is trying to early to MariaDB, I have to find out why this is the case and not just downgrade to an older version in a manner of "try and error".

Would be nice to hear your experiences with NDO-3 in the new Nagios version.

Thank you very much.

There have been a number of customers running into issues with the changes to NDO in the 5.7 release. Dev is currently aware of the issues and working to have them fixed in an upcoming release. If you'd like to try a patch that we have available, please update your ticket referencing this forum post and we can provide next steps on that.