Nagios Support Forum

Yes I can, but after a certificate warning.
I have the same warning on ESX wich are ok...
It's just weird...

Definitely weird. From what I'm reading the self-signed certificate is viewed as a fatal error by some perl modules, but what makes this really weird is that it's working on some of your servers and not others. I came across this thread with the same error message.
http://www.steveshipway.org/forum/viewt ... =28&t=4332

Another forum also mentioned adding this environment variable to the check script right after the first line:
But that had mixed results. You could also try reinstalling the vmware sdk and see if that makes any difference.

Also came across this on Vmware's release notes:
http://www.vmware.com/support/developer ... notes.html

When you run a vicfg- vCLI command, an error like the following might result.
Server version unavailable at 'https://<server>/sdk/vimService.wsdl' at /usr/lib/perl5/5.8.8/VMware/VICommon.pm line 545

Workaround: Follow these steps to resolve the issue:

Make sure the version of the LWP::UserAgent Perl module is above 6.0.4.
Turn off host name verification by running the following command:
export PERL_LWP_SSL_VERIFY_HOSTNAME=0

I sorry, for the delay.
Here is one another weird thing about this problem.
When i take a look in my state history report i have the following : The service is flapping but with this error Host IO or CPU unknown...

This could be caused by you losing connectivity to the ESX server during this timeframe or the servers API not responding in a timely manner.

By adding at the top of my check_esx3.pl script I fixed the error