Newbie question on caching Ldap-Group

[Alexander Harm]

Hello,

I have a probably stupid question regarding the caching of Ldap-Group. I've read rather confusing information on the net (like v3 caches Ldap-Group per default, it doesn't work for me) etc.

Contrary to most examples I want the cache to be the failover for LDAP. So if my LDAP server is down, group membership should be retrieved from cache.

sites-enabled/...

	authorize {
		# read group membership from LDAP or cache
		update control {
			Cache-Status-Only = yes
		}
		redundant {
			ldap
			cache
		}
		update control {
			Cache-Status-Only := no
		}
		cache

mods-enabled/cache

	update {
		# Cache LDAP group membership
		&control:Ldap-Group += &control:Ldap-Group
	}

While the fallback works, I'm a bit surprised to see the group information multiply in the cache:

(0) ldap: Waiting for search result...
(0) ldap: Adding cacheable group object memberships
(0) ldap:   &control:LDAP-Group += "AAD DC Administrators"
(0) ldap:   &control:LDAP-Group += "ka.hq.all"
(0) ldap:   &control:LDAP-Group += "ka.hq.portal"
(0) ldap: Processing user attributes
(0) ldap: WARNING: No "known good" password added. Ensure the admin user has permission to read the password attribute
(0) ldap: WARNING: PAP authentication will *NOT* work with Active Directory (if that is what you were trying to configure)
rlm_ldap (ldap): Released connection (0)
(0)       [ldap] = ok
(0)     } # redundant = ok
(0)     update control {
(0)       Cache-Status-Only := no
(0)     } # update control = noop
(0) cache: EXPAND %{User-Name}
(0) cache:    --> John.Doe
(0) cache: No cache entry found for "John.Doe"
(0) cache: Creating new cache entry
(0) cache: EXPAND Cache last updated at %t
(0) cache:    --> Cache last updated at Tue Apr  9 01:32:38 2019
(0) cache:   &reply:Reply-Message += Cache last updated at Tue Apr  9 01:32:38 2019
(0) cache: EXPAND %{randstr:ssssssssssssssssssssssssssssssss}
(0) cache:    --> v9I9w/YhZ9zjjYCDwku8M1o2yY1EZtHj
(0) cache:   &reply:Class := 0x76394939772f59685a397a6a6a594344776b75384d316f32795931455a74486a
(0) cache:   control:Ldap-Group += &control:Ldap-Group[*] -> 'ka.hq.portal'
(0) cache:   control:Ldap-Group += &control:Ldap-Group[*] -> 'ka.hq.all'
(0) cache:   control:Ldap-Group += &control:Ldap-Group[*] -> 'AAD DC Administrators'
(0) cache:   control:Ldap-Group += &control:Ldap-Group[*] -> 'AAD DC Administrators'
(0) cache:   control:Ldap-Group += &control:Ldap-Group[*] -> 'ka.hq.all'
(0) cache:   control:Ldap-Group += &control:Ldap-Group[*] -> 'ka.hq.portal'
(0) cache: Merging cache entry into request
(0) cache:   &reply:Reply-Message += "Cache last updated at Tue Apr  9 01:32:38 2019"
(0) cache:   &reply:Class := 0x76394939772f59685a397a6a6a594344776b75384d316f32795931455a74486a
(0) cache:   &control:LDAP-Group += "ka.hq.portal"
(0) cache:   &control:LDAP-Group += "ka.hq.all"
(0) cache:   &control:LDAP-Group += "AAD DC Administrators"
(0) cache:   &control:LDAP-Group += "AAD DC Administrators"
(0) cache:   &control:LDAP-Group += "ka.hq.all"
(0) cache:   &control:LDAP-Group += "ka.hq.portal"
(0) cache: Committed entry, TTL 86400 seconds

Can I ignore this or did I setup something wrong?

Thanks for your input,

Alexander