For several hours yesterday, visitors trying to sign into the application using the Sign in with Yahoo! link were receiving the following error message:

Sorry, the OpenID server couldn’t be found

After some trial and error on my part, it appeared Yahoo! stopped responding to OpenID server requests at one domain but was still responding on another. I updated the domain name in the application, and it seems to be working properly now.

One of the features I’ve been developing will allow accounts to be associated with more than one OpenID. The feature was intended for spouses who want to sign into their accounts with their own identities. However, when the feature is released, an individual account owner could link more than one OpenID from different providers, preventing a lockout if one server goes offline.