Nagios Support Forum

Since upgrading NLS to 2.0, all our service checks in Nagios xi that monitor Nagios Log Server queries are now broken. They all return 'Server returned invalid output'.

Hi @ngunderson,

You need to reactivate your Nagios Log Server license after performing an upgrade by going to Admin >> General >> License Information.

Example:
Please let me know if you have any questions.

I did that when I upgraded. The issue exists after upgrade and activation.

Also tried regenerating the API key that was being used, and recreating the checks from scratch via the Configuration Wizard. Nothing makes a difference and this is all still broken.

Are the queries in Log Server broken as well? Or does everything work in your Log Server?

Are there any problems with logstash & elasticsearch? Or are there any logs in the /var/log/logstash/logstash.log

The queries work fine on Log Server.

The services are running.

There are logs in /var/log/logstash/logstash.log, but they relate to a different issue (failed parsing date from field, from a totally unrelated log).

Thanks for letting me know.

What version of the Nagios Log Server queries wizard do you have?

xi home --> Admin --> under System Extensions (config wizards) --> find Nagios Log server wizard.

Are you on 1.0.5?