attribute value changes to null (Yasser Afifi)

[Peter Schober]

* Yasser Afifi <yasser at 3dissue.com> [2016-01-25 16:47]:
> Thanks a lot Peter for your reply, this is part of shibd.log  file of the
> SP. can you please tell me if the attribute i am sending is received or
> not, if not, then what is wrong?!

Wrong log file. The documentation for that is not easily findable, though:
https://wiki.shibboleth.net/confluence/display/SHIB2/NativeSPLogging
You'll need to look at your transaction.log:

  "Each session that's created or removed is logged here along with a
  variety of general information, including the set of attributes
  obtained (but not their values)"

Just look at the end of that log after a login attempt and you'll see
a complete list of mapped attributes, between curly bracket { }.
Anything sent by the IDP but not mapped will be logged with "skipping
unmapped" ... lines there as well.
-peter