Orphan Processes

[Xavier LEVRAT]

Hi list, 
 
We arecurrently monitoring 220 Host and 3000 services with NAGIOS 2.5 on Solaris 8.The web server and the CGIs are chrooted, but Nagios core is out of the jail.We use symlinks to ensure the communication between the CORE and the CGIs.
We notice
that some hosts and services suddenly disappear on the web interface. According
to the FAQ, this is due to multiple main nagios process in memory.

 
We are surethat Nagios init script is run just once and then watch nagios processes 
Here is theresult:
-bash-3.1#ps -eaf|grep -i nagios.cfg|grep -v grep;echo;echo;echo
  nagios 
8188     1  0 15:15:24 ?        0:00 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg
  nagios 10334     1 
3   Feb 19 ?       138:44 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg
  nagios 
8200 10334  0 15:15:24?        0:00 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg
  nagios 
8197     1  0 15:15:24 ?        0:00 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg
 
 
 
-bash-3.1#ps -eaf|grep -i nagios.cfg|grep -v grep;echo;echo;echo
  nagios 
8188     1  0 15:15:24 ?        0:00 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg
  nagios 10334     1 
3   Feb 19 ?       138:44 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg
  nagios 
8200 10334  1 15:15:24?        0:00 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg
  nagios 
8204  8200  0 15:15:24 ?        0:00 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg
 
 
 
-bash-3.1#ps -eaf|grep -i nagios.cfg|grep -v grep;echo;echo;echo
  nagios 
8188     1  0 15:15:24 ?        0:00 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg
  nagios 10334     1 
3   Feb 19 ?       138:44 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg
  nagios 
8204     1  0 15:15:24 ?        0:00 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg
  nagios 
8210 10334  1 15:15:24 ?        0:00 /usr/local/bin/nagios -d/usr/local/etc/nagios.cfg




Mainprocess id is 10334, and we see it forking frequently. Some childs fork inturn, then die, letting orphan processes …
What aboutthose orphan processes staying in memory ? Is it Nagios’ normal behaviour ? Doservices and host disappear suddenly because of this ?
Thanks foryour advices !


Regards

Xavier


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