Shibboleth handler invoked at an unconfigured location

[Peter Schober]

* reda sabir <sabiretude at gmail.com> [2016-05-19 12:05]:
> - I retook the same use case : One SP and two IdP where each IdP
> will be used when the user access a specific URL. So, I have two
> hostname pointing at the same website: wso2.shibboleth.example.com
> and openam.shibboleth.example.com.

You already agreed that there was no need for Overrides, yet your
configuration features ApplicationOverrides?!

> - The httpd config look like this :
> #wso2
> <VirtualHost *:80>
>     ServerName wso2.shibboleth.example.com
> 
>     DocumentRoot "/var/www/html/"
>     <Location /secure>
>               AuthType shibboleth
>               ShibRequestSetting requireSession 1
>               ShibRequestSetting applicationId default
>               require shib-session
>      </Location>

"applicationId default" is a noop, AFAIU ("default" is default).
Instead of the override what you want here is
  ShibRequestSetting entityID https://entityid-of-one-such-idp.example.org

>               ShibRequestSetting applicationId openam-id

Same thing: Drop the override, add an entityID parameter.

>     <MetadataProvider type="XML" validate="true"
> file="/etc/shibboleth/wso2_metadata.xml"/>

Here add metadata for all IDPs, not just one.

>     <ApplicationOverride id="openam-id">

Lose the whole ApplicationOverride and child elements.

I've not yet looked at your DEBUG log since none of what you do
matches what you said you wanted.
-peter