Error: No output from backend!

[tchandra]

Hi Team,

we are unable to see status of hosts & services in Nagios Xi , its showing all Zeros.
And when we checked the monitoring engine status its showing Error: No output from backend! under Monitoring Engine Event Queue.

PFA for reference.

Please suggest on this issue.

Regards,
Chandra Sekhar

[ssax]

You could be hitting a bug depending on what XI version you're running.

Please PM me a copy of your profile.zip, you can download it from Admin > System Profile by clicking the Download Profile button.

[tchandra]

Hi Ssax,

PM Sent.

[ssax]

You have crashed database tables:

Code: Select all

210317 14:48:31 [ERROR] mysqld: Table './nagios/nagios_logentries' is marked as crashed and last (automatic?) repair failed
210317 14:48:31 [ERROR] mysqld: Table './nagios/nagios_servicestatus' is marked as crashed and last (automatic?) repair failed
210317 14:48:31 [ERROR] mysqld: Table './nagios/nagios_hoststatus' is marked as crashed and last (automatic?) repair failed

Please repair them:

https://assets.nagios.com/downloads/nag ... tabase.pdf

Then apply configuration and validate.

[tchandra]

Hi Ssax ,

Thanks for your Suggestion, it's worked.

Issue got fixed after executed the command - /usr/local/nagiosxi/scripts/repair_databases.sh

Actually , i have upgraded the Nagios version from 5.7.4 to latest 5.8.2 as a part of troubleshooting, can i revert back to old one or keep the current one.

And one more issue is showing "Update check failed. " at the admin page even after Nagios version upgraded (it showed the same before Upgradation also , hence upgraded to latest one). Latest Version Upgradation is not showing in UPDATE HISTORY.

PFA for reference.


Regards,
Chandra

[ssax]

Can i revert back to old one or keep the current one?

I would stay on XI 5.8.2.

Did you upgrade through the web interface or from the command line?

What does this output from the CLI of the XI server?

Code: Select all

curl -k -L -v 'https://api.nagios.com/'

Do you need to set a proxy in Admin > Proxy Configuration?

[tchandra]

Hi Ssax,

Upgraded through CLI only.

curl -k -L -v 'https://api.nagios.com/' - PM Sent to you.

Do you need to set a proxy in Admin > Proxy Configuration? - - what it would be , if we set proxy in admin.


Regards,
Chandra

[ssax]

CLI upgrades do not show in the web interface.

I replied via PM to your PM. Please read.

[tchandra]

Hi Ssax ,

Much appreciate your support.

You can lock the thread.

Regards,
Chandra

[scottwilkerson]

Hi Ssax ,

Much appreciate your support.

You can lock the thread.

Regards,
Chandra

Locking thread