RE: catcdb.sql fails with ORA-12269: client uses weak encryption/crypto-checksumming version
Date: Wed, 5 Jan 2022 14:52:59 +0000
Message-ID: <120e104abb434c039f8f4568c0bea9d8_at_vontobel.com>
Hi Stefan,
The option -follow_execv traces children (I should have read help more thoroughly before asking).
There isn't a difference between "sys/manager" and "/" when everything goes well - the function ksulbem gets called in both cases.
But in the case of ORA-12269, kserecl0 gets called by ksulbem.
We're now running pin debugtrace in a loop and will examine the trace upon error:
pin -follow_execv -t source/tools/DebugTrace/obj-intel64/debugtrace.so -- sqlplus sys/manager as sysdba
Best regards,
Nenad
-----Original Message-----
From: Stefan Koehler <contact_at_soocs.de>
Sent: Mittwoch, 5. Januar 2022 15:34
To: Noveljic Nenad <nenad.noveljic_at_vontobel.com>; ORACLE-L <oracle-l_at_freelists.org>
Subject: RE: catcdb.sql fails with ORA-12269: client uses weak encryption/crypto-checksumming version
- E-Mail from outside Vontobel: Do not click on links or open attachments unless you know the content is safe. ***
Hi Nenad,
I never tested it but I don't think so - at least the pin documentation just mentions execv() and not fork().
-----8<-----
[root_at_OEL85 pin-3.21-98484-ge7cd811fd-gcc-linux]# ./pin -help
Pin: pin-3.21-98484-e7cd811fd
Copyright 2002-2020 Intel Corporation.
Usage: pin [OPTION] [-t <tool> [<toolargs>]] -- <command line> Use -help for a description of options
General switches
...
-follow_execv [default 0]
Execute with Pin all processes spawned by execv class system calls ...
-----8<-----
Anyway you can use a combination of eBPF (or SystemTap) to intercept the fork() and then attach with pin.
Best Regards
Stefan Koehler
Independent Oracle performance consultant and researcher
Website: http://www.soocs.de
Twitter: _at_OracleSK
Please consider the environment before printing this e-mail. Bitte denken Sie an die Umwelt, bevor Sie dieses E-Mail drucken.
Important Notice
This message is intended only for the individual named. It may contain confidential or privileged information. If you are not the named addressee you should in particular not disseminate, distribute, modify or copy this e-mail. Please notify the sender immediately by e-mail, if you have received this message by mistake and delete it from your system.
Without prejudice to any contractual agreements between you and us which shall prevail in any case, we take it as your authorization to correspond with you by e-mail if you send us messages by e-mail. However, we reserve the right not to execute orders and instructions transmitted by e-mail at any time and without further explanation.
E-mail transmission may not be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete. Also processing of incoming e-mails cannot be guaranteed. All liability of Vontobel Holding Ltd. and any of its affiliates (hereinafter collectively referred to as "Vontobel Group") for any damages resulting from e-mail use is excluded. You are advised that urgent and time sensitive messages should not be sent by e-mail and if verification is required please request a printed version.
Please note that all e-mail communications to and from the Vontobel Group are subject to electronic storage and review by Vontobel Group. Unless stated to the contrary and without prejudice to any contractual agreements between you and Vontobel Group which shall prevail in any case, e-mail-communication is for informational purposes only and is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction.
The legal basis for the processing of your personal data is the legitimate interest to develop a commercial relationship with you, as well as your consent to forward you commercial communications. You can exercise, at any time and under the terms established under current regulation, your rights. If you prefer not to receive any further communications, please contact your client relationship manager if you are a client of Vontobel Group or notify the sender. Please note for an exact reference to the affected group entity the corporate e-mail signature. For further information about data privacy at Vontobel Group please consult www.vontobel.com <https://www.vontobel.com>.
--
http://www.freelists.org/webpage/oracle-l
Received on Wed Jan 05 2022 - 15:52:59 CET