RE: 11GR2 role separation causes dba_views to fail

From: John Hallas <John.Hallas_at_morrisonsplc.co.uk>
Date: Sun, 6 May 2012 10:57:30 +0100
Message-ID: <EC65ECF8123FEE4D8FC5B212637C3040012D99C10F07_at_EXCH1.morrisonsplc.co.uk>

I have now blogged the full test case - it is quite an interesting one - HPUX only as far as I am aware (definitely OK on Linux) http://jhdba.wordpress.com/2012/05/06/test-case-for-11gr2-role-separation-issue-on-hp-ux/

John

-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of John Hallas Sent: 03 May 2012 14:32
To: Oracle-L Group
Subject: 11GR2 role separation causes dba_views to fail

If anybody is interested in helping me with run a test case that indicates that access to V$views is random depending on what is in the buffer cache no matter what user privileges are provided then can they drop me a mail please and I will send a test case. It does not appear to fail on linux but it does on HPUX (11:31) 11GR2 - all versions Some teasers are below

Select username from dba_users;                 - success
Select tablespace_name from dba_tablespaces     - success
Select file_name from dba_data_files            - success

The select from the dba views is successful, as the data has been cached.

Flush the shared pool

SQL> alter system flush shared_pool;

System altered.

SQL> SQL> select username from dba_users;
select username from dba_users

                     *

ERROR at line 1:

ORA-00604: error occurred at recursive SQL level 2
ORA-01115: IO error reading block from file  (block # )
ORA-01110: data file 1: '+DATA/dbatest/datafile/system.269.781706107'
ORA-15081: failed to submit an I/O operation to a disk

Thanks

John

DBA Team Leader
Wm Morrison Supermarkets PLC
Tel 0845 611 4589 Mob: 07876 790540
E-mail: john.hallas_at_morrisonsplc.co.uk

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Wm Morrison Supermarkets Plc is registered in England with number 358949. The registered office of the company is situated at Gain Lane, Bradford, West Yorkshire BD3 7DL. This email and any attachments are intended for the addressee(s) only and may be confidential. 

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Received on Sun May 06 2012 - 04:57:30 CDT