Used LDAP adapter to resolve the alias
Attempting to contact (DESCRIPTION=(ADDRESS_LIST=(LOAD_BALANCE=OFF)(FAILOVER=ON)
(ADDRESS=(PROTOCOL=TCP)(HOST=tst-db1.myco.com)(PORT=1604))
(ADDRESS=(PROTOCOL=TCP)(HOST=tst-db2.myco.com)(PORT=1604)))(CONNECT_DATA=
SERVICE_NAME=mydb1.myco.com)(SERVER=DEDICATED)))
OK (80 msec)

jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(LOAD_BALANCE=OFF)(FAILOVER=ON)
(ADDRESS=(PROTOCOL=TCP)(HOST=tst-db1.myco.com)(PORT=1604))
(ADDRESS=(PROTOCOL=TCP)(HOST=tst-db2.myco.com)(PORT=1604)))
(CONNECT_DATA=SERVICE_NAME=mydb1.myco.com)(SERVER=DEDICATED)))

* More fine-grained control over all aspects of the application design.
* High degree of control over program execution.
* Use of familiar 3GL programming techniques and application development tools such as browsers and debuggers.
* Support of dynamic SQL,method 4.
* Availability on the broadest range of platforms of all the Oracle programmatic interfaces.
* Dynamic bind and define using callbacks.
* Describe functionality to expose layers of server metadata.
* Asynchronous event notification for registered client applications.
* Enhanced array data manipulation language (DML) capability for array INSERTs, UPDATEs, and DELETEs.
* Ability to associate a commit request with an execute to reduce round-trips.
* Optimization for queries using transparent prefetch buffers to reduce round-trips.
* Thread safety so you do not have to use mutual exclusive locks (mutex) on OCI handles.
* The server connection in nonblocking mode means that control returns to the OCI code when a call is still executing or could not complete.

testi=(DESCRIPTION =
(ADDRESS_LIST=
 (ADDRESS= (PROTOCOL = TCP)(HOST = scan-ip-or-name)(PORT = 1521))
 (FAILOVER = on)
 (LOAD_BALANCE = on)
)
(CONNECT_DATA=
 (SERVICE_NAME = testi)
) )