Nagios Support Forum

Thanks for the update and acknowledgement. After the fact, we did end up finding the check_for_updates config option and that seems to be the easiest work around.

Today we had several Nagios daemons segfault randomly (all running RHEL8.10 and Nagios Core 4.4.13). We tried restarting them immediately, but they all continued to segfault. Looking in /var/log/messages, we found the following... Oct 24 10:45:58 tucnag02 kernel: nagios[1345618]: segfault Oct 24 10:...

Nagios segfaulted on us today and it produced a core file. I started looking at it a little bit, but I'm not sure exactly what to look for. A few basic commands gave me this... (gdb) where #0 0x00007ffff75504ad in vfprintf () from /lib64/libc.so.6 #1 0x00007ffff755b287 in vfwprintf () from /lib64/li...

Thanks for the tips and info. I now have my Nagios servers all configured for debug and I capped my log file size accordingly. I'm hoping I have everything in place if/when this happens again.

npolovenko, thanks for responding. We have various servers running at our sites, but the two most recent crashes happened running with 656/12161 hosts/services and 1591/29822 hosts/services respectively. We are not using mod gearman, however we are using the livestatus portion of check_mk. I don't r...

Over the years I've experienced some random segfaults with Nagios Core and I've struggled to figure out the best way to troubleshoot. Recently, I've had two incidents within 3 days on two separate servers, but in the past it was once every 6 months or so on just one of my servers. What I'm really lo...

Thanks @npolovenko. I thought that was probably the case. I appreciate the explanation.

Here is the service definition along with it's templates. define service{ hostgroup NETWORK_SWITCHES service_description SNMP:Trap contact_groups email-network-team action_url /pnp4nagios/info/graph?host=$HOSTNAME$&srv=$SERVICEDESC$ use snmptrap_service } define service{ name snmptrap_service us...

I have a recently ran into a scenario that had me somewhat perplexed as to what is going on. I have a SNMP Trap service configured that is passive only and is also set to volatile. Downtime was scheduled for this service and during the downtime window six traps came in and the service went to a crit...

I'm occasionally seeing Nagios 4.1.1 segfault on RHEL6.4. I've been seeing these happen every few months. I've checked the nagios.log and the messages log and the only thing I can find is the following in the messages log... Jul 30 19:37:12 btvnag01 kernel: nagios[6550]: segfault at 3030302e90 ip 00...