Nagios Support Forum

Posted: **Tue Mar 30, 2021 12:09 pm**

We are running 5.8.2 XI. While watching /usr/local/nagios/var/nagios.log, we are constantly seeing in the logs like someone keeps pressing the 'Apply Configuration' button. We see this:
[1617112105] NDO-3: Started acknowledgement thread
[1617112105] NDO-3: Started notification thread
[1617112105] NDO-3: Started service_status thread
[1617112105] NDO-3: Started statechange thread
[1617112105] NDO-3: Started downtime thread
[1617112105] Successfully launched command file worker with pid 652150
[1617112105] Successfully shutdown... (PID=651953)
[1617112105] NDO-3: Callbacks deregistered
[1617112105] NDO-3: NDO - Shutdown complete
[1617112105] Event broker module '/usr/local/nagios/bin/ndo.so' deinitialized successfully.

We also see this sometimes:
[1617112988] Caught SIGTERM, shutting down...
[1617112988] Caught SIGTERM, shutting down...
[1617112988] Caught SIGTERM, shutting down...
[1617112988] Successfully shutdown... (PID=658264)
[1617112988] NDO-3: Callbacks deregistered
[1617112988] NDO-3: NDO - Shutdown complete
[1617112988] Event broker module '/usr/local/nagios/bin/ndo.so' deinitialized successfully.
[1617112988] Nagios 4.4.6 starting... (PID=659313)
[1617112988] Local time is Tue Mar 30 09:03:08 CDT 2021
[1617112988] LOG VERSION: 2.0
[1617112988] qh: Socket '/usr/local/nagios/var/rw/nagios.qh' successfully initialized
[1617112988] qh: core query handler registered
[1617112988] qh: echo service query handler registered
[1617112988] qh: help for the query handler registered
[1617112988] wproc: Successfully registered manager as @wproc with query handler
[1617112988] wproc: Registry request: name=Core Worker 659317;pid=659317
[1617112988] wproc: Registry request: name=Core Worker 659318;pid=659318
[1617112988] wproc: Registry request: name=Core Worker 659319;pid=659319
[1617112988] wproc: Registry request: name=Core Worker 659321;pid=659321
[1617112988] wproc: Registry request: name=Core Worker 659324;pid=659324
[1617112988] wproc: Registry request: name=Core Worker 659323;pid=659323
[1617112988] wproc: Registry request: name=Core Worker 659325;pid=659325
[1617112988] wproc: Registry request: name=Core Worker 659331;pid=659331
[1617112988] wproc: Registry request: name=Core Worker 659332;pid=659332
[1617112988] wproc: Registry request: name=Core Worker 659327;pid=659327
[1617112988] wproc: Registry request: name=Core Worker 659330;pid=659330
[1617112988] wproc: Registry request: name=Core Worker 659328;pid=659328
[1617112988] NDO-3: NDO 3.0.6RC1 (c) Copyright 2009-2020 Nagios - Nagios Core Development Team
[1617112988] NDO-3: Callbacks registered
[1617112988] NDO-3: Callbacks registered

After so many times, the nagios service fails:

[root@nagios-new log]# systemctl status nagios
● nagios.service - Nagios Core 4.4.6
Loaded: loaded (/usr/lib/systemd/system/nagios.service; enabled; vendor preset: disabled)
Active: failed (Result: start-limit-hit) since Tue 2021-03-30 09:07:47 CDT; 2min 58s ago
Docs: https://www.nagios.org/documentation
Process: 671339 ExecStopPost=/usr/bin/rm -f /usr/local/nagios/var/rw/nagios.cmd (code=exited, status=0/SUCCESS)
Process: 671315 ExecStop=/usr/bin/kill -s TERM ${MAINPID} (code=exited, status=0/SUCCESS)
Process: 671133 ExecStart=/usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg (code=exited, status=0/SUCCESS)
Process: 671130 ExecStartPre=/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg (code=exited, status=0/SUCCESS)
Main PID: 671134 (code=exited, status=0/SUCCESS)
Mar 30 09:07:46 nagios-new.acentek.net nagios[671134]: Warning: Contact 'testing' has no service notification time period defined!
Mar 30 09:07:46 nagios-new.acentek.net nagios[671134]: Warning: Contact 'testing' has no host notification time period defined!
Mar 30 09:07:47 nagios-new.acentek.net nagios[671134]: Successfully launched command file worker with pid 671337
Mar 30 09:07:47 nagios-new.acentek.net nagios[671134]: Successfully shutdown... (PID=671134)
Mar 30 09:07:47 nagios-new.acentek.net nagios[671134]: Event broker module '/usr/local/nagios/bin/ndo.so' deinitialized successfully.
Mar 30 09:07:47 nagios-new.acentek.net systemd[1]: nagios.service: Succeeded.
Mar 30 09:07:47 nagios-new.acentek.net systemd[1]: Stopped Nagios Core 4.4.6.
Mar 30 09:07:47 nagios-new.acentek.net systemd[1]: nagios.service: Start request repeated too quickly.
Mar 30 09:07:47 nagios-new.acentek.net systemd[1]: nagios.service: Failed with result 'start-limit-hit'.
Mar 30 09:07:47 nagios-new.acentek.net systemd[1]: Failed to start Nagios Core 4.4.6.

Server OS:
Linux nagios-new.acentek.net 4.18.0-240.1.1.el8_3.x86_64 #1 SMP Thu Nov 19 17:20:08 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Posted: **Tue Mar 30, 2021 3:09 pm**

Hi,

It may be best to downgrade this system to the pervious version of NDO. However, please try to run the db repair script first.

Run as root from the CLI:

Code: Select all

/usr/local/nagiosxi/scripts/repair_databases.sh

Then follow the steps to increase the max connections on the database.

Nagios XI - MySQL/MariaDB - Max Connections

If you do not notice any improvement, please try to downgrade the database application. It's a simple procedure (it's also easy to upgrade again).

Take a full backup first.

### STANDARD DOWNGRADE OF NDO3 ( Local Database )

Code: Select all

systemctl stop nagios
cd /tmp
rm -rf /tmp/nagiosxi
wget https://assets.nagios.com/downloads/nagiosxi/5/xi-5.6.14.tar.gz
tar zxf xi-5.6.14.tar.gz
cd /tmp/nagiosxi/subcomponents/ndoutils
./install
systemctl enable ndo2db

Then edit your /usr/local/nagios/etc/nagios.cfg and make sure this line is uncommented:

Code: Select all

broker_module=/usr/local/nagios/bin/ndomod.o config_file=/usr/local/nagios/etc/ndomod.cfg

Make sure this line is commented:

Code: Select all

#broker_module=/usr/local/nagios/bin/ndo.so /usr/local/nagios/etc/ndo.cfg

Then start the nagios service:

Code: Select all

systemctl start nagios

Lastly, I just noticed you have ticket opened as well for this issue. Please follow up on the ticket and reference this thread, so we do not have duplicates opened.

Best Regards,
Benjamin

Nagios Support Forum

Issue..NDO3/Nagios

Issue..NDO3/Nagios

Re: Issue..NDO3/Nagios