change IdP IP address and unknown artifact

Dave Perry Dave.Perry at
Mon Nov 24 10:43:55 EST 2014

If it's DNS, doesn't that take up to 24hours to propagate (worldwide) fully anyway?
So maybe leave them both on and just sit it out (with a notice to users, if you feel like, saying things might be a bit rocky for a day)?


Dave Perry
eLearning Technologist, Hull College Group

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-----Original Message-----
From: users-bounces at [mailto:users-bounces at] On Behalf Of Cantor, Scott
Sent: 24 November 2014 15:38
To: Shib Users
Subject: Re: change IdP IP address and unknown artifact

On 11/24/14, 3:30 PM, "Athanasios Douitsis" <aduitsis at> wrote:
>The host system is a FreeBSD 9 jail, and I simply copied the jail to 
>another machine and changed its IP address.
>After stopping the initial jail, I changed the IdP A record to point to 
>the new IP, I started the second jail with the new  IP and started 
>seeing these messages for a couple of minutes. I reverted back to the 
>original jail as I hadn't expected to run into this kind of trouble.

If the messages were on the old IP, the cause is DNS caching bugs. If they're on the new IP, then the only explanation is that clients are getting artifacts from the old one.

-- Scott

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