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NRPE: Call to popen() failed
Posted: Tue Sep 09, 2014 3:00 am
by ashok
For a Unix server ,
Im getting this output for Swap and CPU Usages frequently.. and automatically it gets rectified,
NRPE: Call to popen() failed
Can someone please enlighten me what does the above ouptput mean
Re: NRPE: Call to popen() failed
Posted: Tue Sep 09, 2014 9:29 am
by tmcdonald
- Is this the service status output you are seeing?
- What version of NRPE are you using?
- What OS and version are each of the servers?
- What Nagios version is this?
Re: NRPE: Call to popen() failed
Posted: Wed Sep 10, 2014 2:06 am
by ashok
Is this the service status output you are seeing?
Yes.. Status Information
What version of NRPE are you using?
nrpe-2.12, nagios-plugins-1.4.15
What OS and version are each of the servers?
Hpunix V11.3i
What Nagios version is this?
Version 3.2.3
Re: NRPE: Call to popen() failed
Posted: Wed Sep 10, 2014 5:12 pm
by abrist
From the NRPE source:
Code: Select all
/* report an error if we couldn't run the command */
if(fp==NULL){
strncpy(buffer,"NRPE: Call to popen() failed\n",sizeof(buffer)-1);
What are the permissions on the problematic plugins? Can you run them as the user "nagios"?
Code: Select all
ls -la <path/to/plugin>
su - nagios -c <check_command and args>
Re: NRPE: Call to popen() failed
Posted: Wed Sep 10, 2014 5:12 pm
by tmcdonald
This may be related to an older bug in NRPE:
http://tracker.nagios.org/view.php?id=330
Specifically, can you try the following post from the bug report as a potential fix?
Theoretically, this problem applies only when running under a non-root account (which is recommended).
As a workaround, you can increase the soft limit of "nofile" in /etc/security/limits.conf for the user account under which nrpe runs. You need to restart the process for the change to become effective.