I need some help. We are using Nagios 1.3 for quiet a while and everything works pretty well. There is only one problem that seems to be impossible to get fixed. From time to time Nagios returns “Info: CRITICAL - Socket timeout after 40 seconds” for a service, e.g. for a http check. Then I check the site in my browser and the site is there. Also the server is not overloaded, everything is normal. A few minutes later Nagios reports ok again.
This happens every now and then for all of the checked services, without any regularity. Also the servers are monitored with smokeping and smokeping does not show anything strange. If I increase the timeout with -t then I get something like “Info: (No Information Returned From Host Check)”