RE: Reading resource busy error system trace

From: Noveljic Nenad <nenad.noveljic_at_vontobel.com>
Date: Sun, 12 Jun 2022 08:38:08 +0000
Message-ID: <c743809996614256821b183c56a177b2_at_vontobel.com>



This file isn’t the beginning of the system dump – it continues from another trace file: (TRACE CONTINUED FROM FILE)

The information of the root blocker is at the beginning of the system dump. It’s straight forward - look for the string “Final Blocker” for your Powercenter session.

Best regards,

Nenad

From: oracle-l-bounce_at_freelists.org <oracle-l-bounce_at_freelists.org> On Behalf Of Pap Sent: Samstag, 11. Juni 2022 15:20
To: Oracle L <oracle-l_at_freelists.org> Subject: Reading resource busy error system trace

I had posted this one in the past here. But now having the trace collected , finding it hard to understand the trace. Appreciate guidance here.

Background:-

We were encountering intermittent Ora-0054 error on specific time towards the end of the month for a job and from the line number noted in the error log it's pointing to the alter statement which enables reference constraints after a direct path data load and commit.

But we tried monitoring it a few times during the error period/run time but were not seeing any lock on the base table but still the job failed and it succeeded after a couple of rerun attempts. We tried enabling the system trace as below and did capture the trace.

I am unable to understand the culprit of this error out of this system trace. I posted the trace in the below location with a few masked obj names. It has a lot of information(~50K+ lines) but I think I am supposed to look into a certain section of it, but I am not able to find that out. Could you please guide me here?

alter system set events "00054 trace name systemstate level 266, lifetime 1";

https://gist.github.com/oracle9999/10e33916ad43748b7802719812b4ddc2

*****Below statements failing

ALTER TABLE SCHEMA1.MAIN_TAB ENABLE NOVALIDATE CONSTRAINT MAIN_TAB_R01; ALTER TABLE SCHEMA1.MAIN_TAB ENABLE NOVALIDATE CONSTRAINT MAIN_TAB_R03; ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired



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Received on Sun Jun 12 2022 - 10:38:08 CEST

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