SP metadata re-generation after changing hostname

[Peter Schober]

* MA Lanxin <ma at ihep.ac.cn> [2021-10-19 09:28]:
> As some reason , I changed the SP hostname, and I changed
> ApplicationDefaults entityID to the new hostname.

Unless the old entityID was never used with anyone don't do that:

"The most important attribute an entityID needs to have is persistence."
https://shibboleth.atlassian.net/wiki/spaces/CONCEPT/pages/928645134/EntityNaming

> I re-generated the SP's metadata with the new hostname via the link
> https://doc.ihep.ac.cn/Shibboleth.sso/Metadata

That doesn't "regenerate" anything, it merely generates what is
currently configured on each request, based on the vhost accessed.

> I  also re-gererated the sp-signing and sp-encrypt.

Don't do that, either.

> But, the new metadata still contains the old hostname. i.e.

Cf. ServerName in your web server (assuming Apache httpd).

-peter