We found that bind password was wrong in our configuration and changed it.
Now, on pooling time, cache refresh triggered and users from source LDAP has been added to our gluu LDAP.
But it throws below error in **oxtrust_cache_refresh.log**
2015-06-19 04:54:42,144 ERROR [gluu.oxtrust.ldap.cache.service.CacheRefreshTimer] (pool-5-thread-9) Failed to 'add' person '@!36A3.B263.FC4E.2FD7!0001!DE34.B808!0000!CA94.BEDB'
org.gluu.site.ldap.persistence.exception.EntryPersistenceException: Failed to persist entry: inum=@!36A3.B263.FC4E.2FD7!0001!DE34.B808!0000!CA94.BEDB,ou=people,o=@!36A3.B263.FC4E.2FD7!0001!DE34.B808,o=gluu
at org.gluu.site.ldap.persistence.LdapEntryManager.persist(LdapEntryManager.java:94)
**Cause**
Caused by: Connection exception (LDAP config error: schema violation contact LDAP admin.: Entry inum=@!36A3.B263.FC4E.2FD7!0001!DE34.B808!0000!CA94.BEDB,ou=people,o=@!36A3.B263.FC4E.2FD7!0001!DE34.B808,o=gluu violates the Directory Server schema configuration because it is missing attribute cn which is required by objectclass person)
at org.gluu.site.ldap.OperationsFacade.addEntry(OperationsFacade.java:305)
Also, in **Manage People** menu option in oxTrust GUI, we don't find any users on search.