Nagios Support Forum

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[root@nagiosxivm tmp]# vi check6ve7op
### Active Check Result File ###
file_time=1343197496

### Nagios Service Check Result ###
# Time: Wed Jul 25 06:24:56 2012
host_name=xxxxx
service_description=xxxxxxxxxx
check_type=0
check_options=4
scheduled_check=1
reschedule_check=1
latency=1.200000
start_time=1343197496.200880

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rm -f /tmp/check*

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 rm -f /tmp/check* 

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  killall -9 nagios 

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heck Services Being Orphaned
Some users have encountered large numbers of warning messages that accumulate quickly that read as follows:

Warning: The check of service <Your Service> on host <Your Host> looks like it was orphaned (results never came back). I'm scheduling an immediate check of the service..

This is most likely caused by multiple instances of Nagios running. To fix this kill all instances of Nagios and then restart the process.

 killall -9 nagios
Then restart Nagios from the Admin menu of the web interface.

Related forum post can be read here.


If the issue continues to persist after reboots and restarts of the Nagios service, then the issue is most likely caused by either a memory leak in embedded perl, or system ulimit restrictions. Symptoms can include the /tmp directory filling up quickly with check* files, and the following errors in the nagios log.

 [1331905537] Warning: The check of service 'SERVICE' on host 'NAMESERVER' looks like it WAS 
 orphaned (results never Came back). I'm scheduling an immediate check of the service ...
 [1331755699] Warning: The check of service 'SWAP' on host 'nameserver' not could be due to Performed 
 to fork () error 'Resource temporarily unavailable'. The check will be rescheduled. 
Try the following solutions:

Edit /etc/security/limits.conf

 * hard memlock 128     #locked memory
 * soft memlock 128
 * soft nofile 4096      #open files
 * hard nofile 4096
 * hard nproc 4096     #max user processes
 * soft nproc 4096
 * hard stack 20480     #stack size
 * soft stack 20480
and restart the server. Run

 ulimit -a 
to verify that the new settings are in place.


And also update the settings in your nagios.cfg file to match the following:

 enable_embedded_perl=0
 use_embedded_perl_implicitly=0

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 Monitoring Performance
Service Check Execution Time:	0.00 / 12.72 / 1.457 sec
Service Check Latency:	0.00 / 9036.63 / 3097.635 sec
Host Check Execution Time:	0.00 / 12.39 / 1.553 sec
Host Check Latency:	0.00 / 9035.63 / 3370.838 sec
#[b] Active Host / Service Checks:	2867 / 5613[/b]
# Passive Host / Service Checks:	0 / 1