ORA-17628, ORA-19505 during RMAN DUPLICATE FROM ACTIVE Metalink : [ID 1331986.1]

When I tried to use Oracle 11g`s create active standby feature weeks ago I faced below error, but after research it on Metalink I found solution.

[oracle@db-server dbs]$ rman target / auxiliary sys/oracle@testdb_stby;

Recovery Manager: Release 11.2.0.1.0 - Production on Sun Oct 28 17:11:39 2012

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

connected to target database: TESTDB (DBID=2580410479)

connected to auxiliary database: TESTDB (not mounted)

RMAN> DUPLICATE TARGET DATABASE FOR STANDBY FROM ACTIVE DATABASE

NOFILENAMECHECK

DORECOVER SPFILE

SET DB_UNIQUE_NAME="TESTDB_STBY"

SET LOG_ARCHIVE_DEST_2="service=TESTDB_LIVE LGWR SYNC REGISTER VALID_FOR=(online_logfile,primary_role)"

SET CONTROL_FILES='/oracle/product/11.2.0/oradata/testdb/control01.ctl';

Starting Duplicate Db at 28-OCT-12

using target database control file instead of recovery catalog

allocated channel: ORA_AUX_DISK_1

channel ORA_AUX_DISK_1: SID=18 device type=DISK

contents of Memory Script:

{

   backup as copy reuse

   targetfile  '/oracle/product/11.2.0/db_1/dbs/orapwtestdb' auxiliary format

 '/oracle/product/11.2.0/db_1/dbs/orapwtestdb'   targetfile

 '/oracle/product/11.2.0/db_1/dbs/spfiletestdb.ora' auxiliary format

 '/oracle/product/11.2.0/db_1/dbs/spfiletestdb.ora'   ;

   sql clone "alter system set spfile= ''/oracle/product/11.2.0/db_1/dbs/spfiletestdb.ora''";

}

executing Memory Script

Starting backup at 28-OCT-12

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=40 device type=DISK

Finished backup at 28-OCT-12

sql statement: alter system set spfile= ''/oracle/product/11.2.0/db_1/dbs/spfiletestdb.ora''

contents of Memory Script:

{

   sql clone "alter system set  db_unique_name =

 ''TESTDB_STBY'' comment=

 '''' scope=spfile";

   sql clone "alter system set  LOG_ARCHIVE_DEST_2 =

 ''service=TESTDB_LIVE LGWR SYNC REGISTER VALID_FOR=(online_logfile,primary_role)'' comment=

 '''' scope=spfile";

   sql clone "alter system set  CONTROL_FILES =

 ''/oracle/product/11.2.0/oradata/testdb/control01.ctl'' comment=

 '''' scope=spfile";

   shutdown clone immediate;

   startup clone nomount;

}

executing Memory Script

sql statement: alter system set  db_unique_name =  ''TESTDB_STBY'' comment= '''' scope=spfile

sql statement: alter system set  LOG_ARCHIVE_DEST_2 =  ''service=TESTDB_LIVE LGWR SYNC REGISTER VALID_FOR=(online_logfile,primary_role)'' comment= '''' scope=spfile

sql statement: alter system set  CONTROL_FILES =  ''/oracle/product/11.2.0/oradata/testdb/control01.ctl'' comment= '''' scope=spfile

Oracle instance shut down

connected to auxiliary database (not started)

RMAN-00571: ===========================================================

RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============

RMAN-00571: ===========================================================

RMAN-03002: failure of Duplicate Db command at 10/28/2012 17:12:32

RMAN-03015: error occurred in stored script Memory Script

RMAN-04014: startup failed: ORA-16184: DB_UNIQUE_NAME testdb hashes to the same value as DB_UNIQUE_NAME testdb

RMAN-04017: startup error description: ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance

Deatil of solution provided by Metalink guide :  Metalink : [ID 1331986.1]

References

BUG:12609412 - ORA-17628 ORA-19505 DURING DUPLICATE FROM ACTIVE