I am having trouble on two machines on two completely different networks, both using squid -- for months now, a reasonably portion of the time, squid fails to get through to google.com.au for the first minute. A tcpdump revealed that it was failing when trying to contact the same 72.14.203.104 host. After a minute, squid would try the next host in the cached DNS result. Since both machines have 4 addresses in their cached result of google.com.au, and both included 72.14.203.104, one in 4 searches would take a minute to get a result. In the event that a hostname resolves to n>1 IPs, and one or more of them m<=n-1 are timing out (or connection refused and certain other error conditions), I think squid should cache this result for a configurable time (of the order of days or until a restart, or until DNS has refreshed its list of IPs for that host), and then not try that IP again until it has exhausted its supply of IPs corresponding to this name. Have I perhaps missed this setting, or am misunderstanding something that would make this not work? -- Tim Connors
