On Mon, 27 Feb 2012, William Herrin wrote:
In some cases this is because of carelessness: The application does a gethostbyname once when it starts, grabs the first IP address in the list and retains it indefinitely. The gethostbyname function doesn't even pass the TTL to the application. Ntpd is/used to be one of the notable offenders, continuing to poll the dead address for years after the server moved.
While yes it often is carelessness - it's been reported by hardcore development sorts that I trust that there is no standardized API to obtain the TTL... What needs to get fixed is get[hostbyname,addrinfo,etc] so programmers have better tools. -- david raistrick http://www.netmeister.org/news/learn2quote.html drais@icantclick.org http://www.expita.com/nomime.html