ranger empty groups sync

[#1]

Hello,

i have a problem when try to sync AD groups with Ranger, empty groups not appear in list of groups.

My "Group Search Filter" (|(cn=RBAC-DataLake-DevOps-Test)(cn=RBAC-DataLake-Jupyter User-Test)(cn=RBAC-DataLake-Add Cards Info-Prod)) in config

In log-file all three groups sync fine:

22 Aug 2018 13:52:41  INFO LdapDeltaUserGroupBuilder [UnixUserSyncThread] - No members available for RBAC-DataLake-Add Cards Info-Prod                                                                                                      │
22 Aug 2018 13:52:41  INFO LdapDeltaUserGroupBuilder [UnixUserSyncThread] - LdapDeltaUserGroupBuilder.getGroups() completed with group count: 3     

But appear only those which contain users.

Platform: HDP 2.6.4.0 on RHEL 7 with Ambari 2.6.1.0

[#2]

I have workaround with adding users to group before sync it