Nagios not receiving passive checks

[sitaonair]

Hi, I have an alarm which monitors is Nagios is receiving passive checks as attached.

There is a cron running every 5 mins sending the below to Nagios which when working properly will have the alarm in OK status:

(bash -c "/bin/echo \"-Services Tools;Nagios passive checks processing;0;Ok\" | /usr/local/nagios/libexec/send_nsca -H ops-nagxi-01 -d \";\" -c /usr/local/nagios/etc/send_nsca.cfg" > /dev/null 2>&1

However the alarm status is always in CRITICAL, how can I check if passive checks are being processed?

[scottwilkerson]

Can you show the "Check Settings" Tab for this service?

If this is setup correctly, Active checks show be off, and Freshness checks should be on.

[sitaonair]

Hi, as attached, noticed many of the nsca processes stuck on the server as well:

nagios 8766 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 8930 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 9904 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 9997 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 10006 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 10007 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 10016 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 10143 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 11170 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 12731 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 12773 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 12866 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 12983 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 12985 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 13240 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 13727 1 0 03:30 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 13877 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 14016 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 14017 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 14244 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 14247 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 14431 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 14655 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd
nagios 14704 1 0 Aug07 ? 00:00:00 nsca -c /usr/local/nagios/etc/nsca.cfg --inetd

[scottwilkerson]

You should set the Check Freshness to On

I would also kill off all those nsca processes, something is clearly wrong there

Code: Select all

killall -9 nsca

[sitaonair]

We had 80 Zombie processes and increasing, coupled with the nsca stuck processes, the nagios server was rebooted.

The "Check Freshness" was also changed to "On", will be monitoring the alarm.

[scottwilkerson]

The "Check Freshness" was also changed to "On", will be monitoring the alarm.

Sounds good