IdP startup issues

[Joel Goguen]

> Yes, turn failFastInitialization off.
> 
> https://wiki.shibboleth.net/confluence/display/SHIB2/IdPMetadataProvider
> 
> But you should understand that in doing that, your IdP will start up fine
> and then services will just fail to work randomly. Either way you're going
> to get called, so a complete solution is probably to look into fixing
> whatever's causing problems with metadata sources.

Would that still apply if the metadata backingFile is present and still valid according to its validUntil rules? For our internal services, we've never had problems; it's entirely external services where we can't manage the SP at all that have caused us problems.