[closed] WAS LDAP cache

Having deployed RTC on WAS and configured WAS-LDAP and RTC-LDAP integrations, I noticed that the WAS-LDAP cache settings can cause some authentication problems.
When the cache was set to a non-null value, a user was not able to login, logout and re-login before the cache timeout had expired.
Jazz did not recognize the user as a member of any Jazz group, so the user had no associated roles and could do nothing.
This problem has suddenly disappeared since we have disabled the cache.
Does WAS cache any information (i.e. also the groups membership) or only the user credentials?
And what are the correct settings of WAS-LDAP cache?