Confluence saml single sign on internal error

Our confluence server use below saml plugin for federated authentication with ADFS.

https://github.com/bitium/confluence-saml-plugin

After our administration change the confluence server host name, we had trouble to do federate authentication. The ADFS no exception. Confluence throw "Smal internal error"


The issue was:

The new confluence server internal mark as use explicit address like:

https://confluence.domain.com:443/

So: the smal endpoint in configuration page is : https://confluence.domain.com:443/plugins/servlet/saml/auth

And the config page there is no relying party identifier, we get it from the ADFS exception "https://confluence.domain.com/confluenceSaml"


But in saml-plugin it expected is acceptance issuer is "https://confluence.domain.com:443/confluenceSaml".


So here is the trick :

The ADFS for replying party trust if identifier is url format.

The ADFS look the address   "https://confluence.domain.com:443/confluenceSaml".
and "https://confluence.domain.com/confluenceSaml"

is Same, But in saml plugin, these two is not same!