我们正在尝试使用下面的代码进行间接嵌套事务,.NET 3.5 和 SQL Server 2005。
MSDN 说,当使用 TransactionScope 时,只要应用程序在 Transaction 中打开第二个连接(甚至是同一个数据库),事务就会升级。
void RootMethod()
{
using(TransactionScope scope = new TransactionScope())
{
/* Perform transactional work here */
FirstMethod();
SecondMethod();
scope.Complete();
}
}
void FirstMethod()
{
using(TransactionScope scope = new TransactionScope(TransactionScopeOption.Required))
{
using (SqlConnection conn1 = new SqlConnection("Data Source=(local);Initial Catalog=Northwind;Integrated Security=SSPI"))
{
string insertString = @"
insert into Categories
(CategoryName, Description)
values ('Laptop1', 'Model001')";
conn1.Open();
SqlCommand cmd = new SqlCommand(insertString, conn1);
cmd.ExecuteNonQuery();
}
scope.Complete();
}
}
void SecondMethod()
{
using(TransactionScope scope = new TransactionScope(TransactionScopeOption.Required))
{
using (SqlConnection conn2 = new SqlConnection("Data Source=(local);Initial Catalog=Northwind;Integrated Security=SSPI"))
{
string insertString = @"
insert into Categories
(CategoryName, Description)
values ('Laptop2', 'Model002')";
conn2.Open(); //Looks like transactionabortedException is happening here
SqlCommand cmd = new SqlCommand(insertString, conn2);
cmd.ExecuteNonQuery();
}
scope.Complete();
}
}
有时,事务失败,没有升级到 DTC,我们得到以下作为内部堆栈跟踪,
System.Transactions.TransactionAbortedException: The transaction has aborted. --->
System.Transactions.TransactionPromotionException: Failure while attempting to promote transaction. --->
System.InvalidOperationException: The requested operation cannot be completed because the connection has been broken.
at System.Data.SqlClient.SqlInternalConnectionTds.ExecuteTransaction(TransactionRequest transactionRequest, String name, IsolationLevel iso, SqlInternalTransaction internalTransaction, Boolean isDelegateControlRequest)
at System.Data.SqlClient.SqlDelegatedTransaction.Promote() --- End of inner exception stack trace ---
at System.Data.SqlClient.SqlDelegatedTransaction.Promote()
at System.Transactions.TransactionStatePSPEOperation.PSPEPromote(InternalTransaction tx)
at System.Transactions.TransactionStateDelegatedBase.EnterState(InternalTransaction tx)
--- End of inner exception stack trace ---
at System.Transactions.TransactionStateAborted.CreateAbortingClone(InternalTransaction tx)
at System.Transactions.DependentTransaction..ctor(IsolationLevel isoLevel, InternalTransaction internalTransaction, Boolean blocking)
at System.Transactions.Transaction.DependentClone(DependentCloneOption cloneOption)
at System.Transactions.TransactionScope.SetCurrent(Transaction newCurrent)
at System.Transactions.TransactionScope.PushScope()
at System.Transactions.TransactionScope..ctor(TransactionScopeOption scopeOption)
谁能帮我找出失败的原因?