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Error: No output from backend!
Posted: Tue Mar 16, 2021 4:01 am
by 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
Re: Error: No output from backend!
Posted: Tue Mar 16, 2021 7:01 pm
by 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.
Re: Error: No output from backend!
Posted: Wed Mar 17, 2021 8:35 pm
by tchandra
Hi Ssax,
PM Sent.
Re: Error: No output from backend!
Posted: Thu Mar 18, 2021 3:52 pm
by 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.
Re: Error: No output from backend!
Posted: Fri Mar 19, 2021 1:51 am
by 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
Re: Error: No output from backend!
Posted: Fri Mar 19, 2021 3:07 pm
by 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?
Re: Error: No output from backend!
Posted: Sun Mar 21, 2021 9:21 pm
by 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
Re: Error: No output from backend!
Posted: Mon Mar 22, 2021 5:15 pm
by ssax
CLI upgrades do not show in the web interface.
I replied via PM to your PM. Please read.
Re: Error: No output from backend!
Posted: Mon Mar 22, 2021 9:20 pm
by tchandra
Hi Ssax ,
Much appreciate your support.
You can lock the thread.
Regards,
Chandra
Re: Error: No output from backend!
Posted: Tue Mar 23, 2021 7:06 am
by scottwilkerson
tchandra wrote:Hi Ssax ,
Much appreciate your support.
You can lock the thread.
Regards,
Chandra
Locking thread