2013-11-19
Interesting DNS problem:
hout0101@monit ...
Interesting DNS problem:hout0101@monitoring:~$ getent hosts fg.geo.uu.nl 131.211.64.24 fg.geo.uu.nl hout0101@monitoring:~$ telnet fg.geo.uu.nl 80 telnet: fg.geo.uu.nl: Name or service not known fg.geo.uu.nl: Unknown hostFound out after serious searching that this was caused by the /etc/resolv.conf line:options rotateOf the 3 available nameservers, numbers 2 and 3 decided to negatively cache fg.geo.uu.nl for good reasons earlier. Options rotate counts per program which means the impact isn't that big for short-lived programs. I guess telnet does a query before querying the nameserver for the needed address to connect to.