Thank You Joseph Joseph_Lutz
I started a thread on Oracle Communities. Found no one in Oracle Fraternity support running this, rather was criticized heavily for executing this.
So now I formally engaged CA Support to review the content. Snippet from the Support Case.
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STEPS TO REPRODUCE.
1. Take a fresh W2K8 R2 machine from LOD.
2. Install 64bit JDK7 update 75.
3. Install Oracle 11g R2 Enterprise Edition. While installing I select [Production, Standalone, Typical] Install mode.
4. After the install is complete. Open Enterprise Manager UI, WORKS!
5. Open SQLPlus Client.
6. Login as "SYS as SYSDBA".
7. SHUTDOWN DB.
8. START DB.
9. Open Enterprise Manager UI, WORKS!
10. Now execute the command as mentioned in the Guide.
Update sys.props$ set value$='UTF8' where name='NLS_NCHAR_CHARACTERSET' Or name = 'NLS_CHARACTERSET';
11. SHUTDOWN DB.
12. START DB.
13. Open Enterprise Manager UI, FAILS to LOAD.
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VERSION USED.
Server : Windows 2008 R2 64bit.
Java : JDK 7 Update 75 64bit.
DB : Oracle 11g R2 64bit.
SQL*Plus: Release 11.2.0.1.0 Production on Thu Feb 26 14:56:23 2015 Copyright (c) 1982, 2010, Oracle. All rights reserved. Enter user-name: SYS as SYSDBA Enter password: Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options
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BUSINESS IMPACT. Our commands on External Vendor Products should align with best practises widely adopted and safe deployment methodologies.
The current step defeats both purpose i.e. Firstly, as seen in the blog, this Query has received wide criticism (including being framed as an unsupported action).
Secondly, it states to Login as SYS and execute this on entire DB level rather than on a user level OR tablespace level.
Consider a usecase where the DB is already pre-populated and AA is introduced. This step risks all existing data within the DB. Ideally it should only apply to the new arcotDB or ArcotUser being created as it is AA requirement. Hence if such a setting needs to be applied it needs to be applied locally rather than Globally.
As we see in the Steps to Reproduce my DB was a brand new install. There was nothing in it, apart the default tables that is shipped on fresh install. Yet the command corrupted the Enterprise Management UI.
Regards
Hubert.