Re: [Evolution] 3.16.3: Failed to refresh folder "INBOX",

[Adam Tauno Williams <awilliam whitemice org>]

On Wed, 2015-06-24 at 10:38 +0100, Pete Biggs wrote:
> On Tue, 2015-06-23 at 17:53 -0600, Zan Lynx wrote:
> > On 06/23/2015 02:24 AM, Pete Biggs wrote:
> > If it does not, that would be a bug.
> Not necessarily.  The DNS entry has a lifetime, it is not at all
> unreasonable for the client to assume that the name<->IP mapping is
> valid for the entirety of the "lifetime".  That's the whole point of 
> it
> - i.e. to reduce the number of DNS queries necessary by caching the
> results.

If it is a bug then it is a bug in MANY libraries and applications used
on a wide variety of platforms [not just GNOME/LINUX].  It likely means
nginx and squid are categorically broken.

The DNS lifetime determines how long it is cached by another DNS server
or a resolver. Clients do not much care about TTL.  

It is very common - if not expected - for clients to *assume* that DNS
look-up results are essentially static.

-- 
Adam Tauno Williams <mailto:awilliam whitemice org> GPG D95ED383
Systems Administrator, Python Developer, LPI / NCLA