Ignore exception only during rollback. Fixes #1317

Author: bgrainger

src/MySqlConnector/Core/XaEnlistedTransaction.cs

@@ -35,24 +35,24 @@ protected override void OnCommit(Enlistment enlistment)
 
 	protected override void OnRollback(Enlistment enlistment)
 	{
-		ExecuteXaCommand("END");
-		ExecuteXaCommand("ROLLBACK");
-	}
-
-	private void ExecuteXaCommand(string statement)
-	{
-		using var cmd = Connection.CreateCommand();
-		cmd.CommandText = "XA " + statement + " " + m_xid;
 		try
 		{
-			cmd.ExecuteNonQuery();
+			ExecuteXaCommand("END");
+			ExecuteXaCommand("ROLLBACK");
 		}
 		catch (MySqlException ex) when (ex.ErrorCode is MySqlErrorCode.XARBDeadlock)
 		{
 			// ignore deadlock when rolling back
 		}
 	}
 
+	private void ExecuteXaCommand(string statement)
+	{
+		using var cmd = Connection.CreateCommand();
+		cmd.CommandText = "XA " + statement + " " + m_xid;
+		cmd.ExecuteNonQuery();
+	}
+
 	private static int s_currentId;
 
 	private string? m_xid;