Error-Code: ora-4020 Deadlock error, while updating a record

Hello!
Is it possible to get a deadlock error when two or more users try to update the same record simultaneously? And what would be the best solution to circumvent this?
Thanks
Your help is appreciated.

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by ( vidya):
Hello Vidhya,
Issue either Commit or Rollback without much delay once the statement(s) is/are executed.
vmkrish
[email protected]
Is it possible to get a deadlock error when two or more users try to update the same record simultaneously? And what would be the best solution to circumvent this?
Thanks
Your help is appreciated.<HR></BLOCKQUOTE>
null

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Raf Serrano wrote:
Hi,
I am a new member of this forum. I am working with a problem we got a few weeks ago. It is from a Pro C batch executable running on 10 threads dealing with >800 data accessed from multiple tables. The error as reported came from a package.function call.
This is the error I encountered:
process_item~G****, D***~-60~ORA-00060: deadlock detected while waiting for resource~PACKAGE ERROR = CLOSE cursor C_***** in package R***.I*** 7641
The cursor is a simple SELECT cursor without Table or Record locking.
My questions are:
*Upon the occurrence of this error, is the execution already at the CLOSE cursor line or did the error occurred between the OPEN cursor and the CLOSE cursor? There are several lines of code in between OPEN and CLOSE:
- one that calls for a package.function that simply stores parameter values to a variable
- another one which fetches the cursor. The group that holds the cursor values is only used by a single function in the package
*Is it possible for this CLOSE cursor to cause a deadlock? What could have caused this?
*From what I know, Oracle deals with deadlocks by aborting the deadlocking process while others continue, but this deadlock caused our program to hang. How is this possible? Could the root cause of the deadlock be from our threading program? This is a rare occurrence and happened only twice this year.
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RafSELECT (without FOR UPDATE) statements are never involved in ORA-00060.
only DML statements throw ORA-00060 error

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The error is coming from an application. Please check the alert log file of the database and further there will be a trace file mentioned in the alert log file in which you will have information of the object which is causing deadlock.
Regards

Error-Code: ora-4020 Deadlock error, while updating a record

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