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[GldRush98]

Since updating to 2012R2.0 I have been getting this error any time I click schedule immediate check, or delete a comment, or anything that pops up the "Submitting command..." window.
I'm not sure what is causing this as our backup XI box does not do this... but our production does. Production forces SSL so I wonder if that has something to do with it?
Pre-2.0 release everything worked perfectly when clicking schedule immediate check or other commands.
It seems that the command is still ran (a check is forced, or a comment is deleted, etc...), but it always kicks this error (and no, the server is not busy):

Image2.png

[lmiltchev]

Go to: Admin->System Information->Monitoring Engine Status, and send us a screenshot of this page.

Also, run the following commands, and post the output:

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df -h
grep check_external /usr/local/nagios/etc/nagios.cfg
ll /usr/local/nagios/var/rw/nagios.cmd

[GldRush98]

Ah, this is no good. More issues on the monitoring engine status page:

Image3.png

"error: No output from backend!"

Result of the commands:

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[root@nagios ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                       74G  3.6G   67G   6% /
/dev/xvda1             99M   22M   72M  24% /boot
tmpfs                 1.0G     0  1.0G   0% /dev/shm
tmpfs                  50M  1.9M   49M   4% /var/nagiosramdisk

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[root@nagios ~]# grep check_external /usr/local/nagios/etc/nagios.cfg
check_external_commands=1

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[root@nagios ~]# ll /usr/local/nagios/var/rw/nagios.cmd
prw-rw---- 1 nagios nagcmd 0 May 28 10:37 /usr/local/nagios/var/rw/nagios.cmd

[slansing]

Can you run the following from the command line and return the output here?:

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service crond status

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ps -aux | grep cron

And please send us your profile.zip, it is downloadable from:

Admin > System Profile > Download

Please verify that you do not have any sensitive information within the zipped file and attach it here, we recommend that you remove the config snapshot as it will house your configuration information.

[GldRush98]

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[root@nagios ~]# service crond status
crond (pid  2000) is running...
[root@nagios ~]# ps aux | grep crond
root      2000  0.0  0.0  74828  1168 ?        Ss   Jan25   5:35 crond
nagios    7982  0.0  0.0 102032  1572 ?        S    13:58   0:00 crond
nagios    7983  0.0  0.0 102032  1572 ?        S    13:58   0:00 crond
nagios    7984  0.0  0.0 102032  1572 ?        S    13:58   0:00 crond
nagios    7985  0.0  0.0 102032  1572 ?        S    13:58   0:00 crond
nagios    7986  0.0  0.0 102032  1572 ?        S    13:58   0:00 crond
root      8193  0.0  0.0  61188   768 pts/0    S+   13:58   0:00 grep crond
[root@nagios ~]#

I've attached the profile minus the snapshot.
Can I ask that once you have downloaded it that you delete the attachment?
Thank you for your help so far.

[abrist]

Lets try stopping/killing/restarting nagios, ndo2db, and mysqld:

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service nagios stop
service ndo2db stop
service mysqld stop

killall nagios
killall ndo2db
killall mysqld

service mysqld start
service ndo2db start
service nagios start

[GldRush98]

Didn't help. Something else that's related, I've only got 3 green checks in the top right corner instead of 6 green checks. I'm guessing that's because something isn't quite right with the backend monitoring.
Would it be worth it to try a reboot, or not?

[abrist]

If a reboot is an option, do it.

[GldRush98]

Rebooted, no change.

[lmiltchev]

Run the following command and show the output:

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tail -n 50 /var/log/cron