mysql TransactionRollbackException

MySQL TransactionRollbackException is an exception that is thrown when a transaction is rolled back due to an error or an explicit rollback command. This exception is usually caused by a problem with the SQL query, such as a syntax error or a constraint violation.

To resolve this issue, you can try the following steps:

1. Check the MySQL error log for any error messages related to the transaction rollback.
2. Review the SQL statements that were executed in the transaction to identify any issues with the queries.
3. Ensure that the transaction is properly structured and that all statements are executed within the same transaction context.
4. Check the database constraints to ensure that they are not being violated during the transaction.
5. If the issue persists, consider rolling back the transaction and starting over with a new transaction.

It is important to note that TransactionRollbackException is a runtime exception, so it may not be caught by the application code. It is recommended to handle this exception in a try-catch block to gracefully handle the error and prevent any unwanted behavior.