Devart Forums

Hi there!

The following code fragment demonstrates the issue:

using (var connection = new MySqlConnection("host=localhost;port=3306;pooling=true;user=user;pwd=pwd"))
{
connection.Open();
connection.BeginTransaction();
}

System.NullReferenceException Object reference not set to an instance of an object.
at Devart.Data.MySql.au.a(ref Int32 A_0, ref ArrayList A_1, ref ac A_2, ref String A_3)
at Devart.Data.MySql.k.e()
at Devart.Data.MySql.MySqlCommand.InternalExecute(CommandBehavior behavior, IDisposable stmt, Int32 startRecord, Int32 maxRecords)
at Devart.Common.DbCommandBase.ExecuteDbDataReader(CommandBehavior behavior, Boolean nonQuery)
at Devart.Common.DbCommandBase.ExecuteNonQuery()
at Devart.Data.MySql.MySqlConnection.Rollback()
at Devart.Data.MySql.MySqlTransaction.Dispose(Boolean disposing)
at Devart.Data.MySql.j.k()
at Devart.Common.DbConnectionBase.Close()
at Devart.Data.MySql.MySqlConnection.Close()
at Devart.Data.MySql.MySqlConnection.Dispose(Boolean disposing)
at System.ComponentModel.Component.Dispose()

This does not happen if the transaction is rolled back explicitly.

Version: dotConnect.Express.for.MySQL.8.4.602

We have reproduced the issue. We will investigate it and post here about the results as soon as possible.

Great, thanks!

We have fixed the bug with throwing NRE when a transaction associated with a connection is not closed, and the connection is implicitly closed. We will post here when the corresponding build of dotConnect for MySQL is available for download.

New build of dotConnect for MySQL 8.5.658 is available for download now!
It can be downloaded from http://www.devart.com/dotconnect/mysql/download.html (trial version) or from Registered Users' Area (for users with valid subscription only).
For more information, please refer to viewtopic.php?t=33729