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Why do I get a concurrency error message?
The concurrency error message was occurring in my application when the user entered data into the form, then saved the change, and subsequently modified that same record, and then saved it again. Obviously, if the same user makes a change to a record that they just saved, they want to save the updated record and there is no concurrency issue.
Why do I get error ” could not lock the record “?
Recently came across a typical scenario where I needed to cancel a long running concurrent request and while doing the same from the front end, I kept getting error “ Could not lock the record “. Later on I thought to mark it as terminated by running below “update” statement from the database.
Is there an error obtaining concurrency lock in Hana?
If you are on BPC on HANA, you may see the error “Database returned the SQL code 131. Error text: transaction rolled back by lock wait timeout: Lock timeout occurs while waiting RECORD_LOCK of mode EXCLUSIVE (TRANSACTION_ID=70,UPDATE_TRANSACTION_ID=325118715)”
When does a concurrency violation occur in a project?
The concurrency violation occurs when I run the project, add a record and save it, make a change to the same record and then save it. The full error message reads: Concurrency violation: the UpdateCommand affected 0 of the expected 1 records. Include logic in your application to handle concurrency violations.
How to deal with concurrency conflicts in SQL?
Use DbUpdateConcurrencyException.Entries to prepare a new set of changes for the affected entities. Refresh the original values of the concurrency token to reflect the current values in the database. Retry the process until no conflicts occur.
What does it mean to use concurrency in JavaScript?
Concurrency means doing multiple things at one time but does not specifically refer to the use of multiple threads. JavaScript uses an event loop to implement concurrency using a single thread. In the context of.NET applications, concurrency is almost always associated with execution on simultaneous threads. That’s probably not intentional.
How does concurrency control work in a database?
You can view this article’s sample on GitHub. Database concurrency refers to situations in which multiple processes or users access or change the same data in a database at the same time. Concurrency control refers to specific mechanisms used to ensure data consistency in presence of concurrent changes.