This looks interesting.
140612_102819.712,INF,LDAP Res,Search returned, context [-2] connection [016644E0] msgId  complete duration  result [53/DSA is unwilling to perform
] name [&] state 
Have you got a full text index on your LDAP?
You're using Domino. Can you use ldapsearch.exe to query LDAP? You can find some good resources on the internet on ldapsearch.exe but here is an example.
c:\Program Files (x86)\IBM\Notes>ldapsearch.exe -h ldap.acme.com -D bind-account -w passw0rd "cn=*user*"
If you get an error then the problem is LDAP related and not with the Community server.