Created attachment 1369007 [details]
logs

Description of problem:
I tried to query for a user for a VM permissions, the operation failed with the following exception:

2017-12-17 14:15:36,179+02 ERROR [org.ovirt.engine.core.bll.SearchQuery] (default task-6) [] Exception: java.lang.ClassCastException: java.util.Collections$EmptyMap cannot be cast to java.u
til.HashMap
        at org.ovirt.engine.core.bll.SearchQuery.initQueryData(SearchQuery.java:506) [bll.jar:]
        at org.ovirt.engine.core.bll.SearchQuery.searchDirectoryUsers(SearchQuery.java:269) [bll.jar:]
        at org.ovirt.engine.core.bll.SearchQuery.executeQueryCommand(SearchQuery.java:177) [bll.jar:]
        at org.ovirt.engine.core.bll.QueriesCommandBase.executeCommand(QueriesCommandBase.java:106) [bll.jar:]
        at org.ovirt.engine.core.dal.VdcCommandBase.execute(VdcCommandBase.java:33) [dal.jar:]
        at org.ovirt.engine.core.bll.executor.DefaultBackendQueryExecutor.execute(DefaultBackendQueryExecutor.java:14) [bll.jar:]
        at org.ovirt.engine.core.bll.Backend.runQueryImpl(Backend.java:579) [bll.jar:]


Version-Release number of selected component (if applicable):
rhvm-4.2.0.2-0.1.el7.noarch

How reproducible:
Not always

Steps to Reproduce:
Have an additional user, creation:
# ovirt-aaa-jdbc-tool user add elad
# ovirt-aaa-jdbc-tool user password-reset elad interactive

1. Webadmin: Search for the new user under VM's permission -> add  

Actual results:
Query for the new user failed with the mentioned exception

Expected results:
Query for users should succeed.

Additional info:


engine=# select * from users;
               user_id                | name  | surname |     domain     | username | department | email | note | last_admin_check_status |             external_id              |         _c
reate_date          |         _update_date          | namespace 
--------------------------------------+-------+---------+----------------+----------+------------+-------+------+-------------------------+--------------------------------------+-----------
--------------------+-------------------------------+-----------
 5a1ac77e-0256-01ce-01ce-000000000310 | admin |         | internal-authz | admin    |            |       |      | t                       | 1f7b991d-7630-45d7-90fc-1b83eb8d8f2a | 2017-11-26
 15:53:41.669393+02 | 2017-11-27 11:49:00.372089+02 | *
 4581cabb-ac36-4fc7-bb56-ccd0235ac4e9 |       |         | internal-authz | elad     |            |       |      | f                       | 913e0cb4-05ca-4608-a01c-b653cd6721a6 | 2017-12-03
 17:22:31.459956+02 |                               | *
(2 rows)