When deployment is configured to be secured with DIGEST, but http-authentication-factory does not list DIGEST mechanism, user is not informed about misconfiguration. Even when TRACE logging is turned on. When user tries to access app 403 http code is returned and Forbidden is shown in browser. I would expect browser dialog to appear to allow user provide credentials (401 http status code).

  <login-config>
      <auth-method>DIGEST</auth-method>
      <realm-name>ApplicaitonRealm</realm-name>
  </login-config>

<http-authentication-factory name="application-http-authentication" http-server-mechanism-factory="global" security-domain="ApplicationDomain">
    <mechanism-configuration>
        <mechanism mechanism-name="BASIC">
            <mechanism-realm realm-name="Application Realm"/>
        </mechanism>
        <mechanism mechanism-name="FORM"/>
    </mechanism-configuration>
</http-authentication-factory>

This applies globally to all authentication mechanisms, not only DIGEST.

Could elytron handle misconfiguration:

• either fail during deploying application as deployment requirement can't be satisfy
• or provide reasonable elytron defaults of missing mechanism configuration.