c# - 使用 TransactionScope : System. Transactions.TransactionAbortedException:事务已中止

Question

我们正在尝试使用下面的代码、.NET 3.5 和 SQL Server 2005 进行间接嵌套事务。

MSDN 表示，在使用 TransactionScope 时，只要应用程序在事务中打开第二个连接(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();
    }
  }

偶尔，交易失败，没有提升到 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？

Answer 1

如果您使用 TransactionScope 并且您:

• 打开一个以上的数据库连接
• 正在连接到 SQL Server 2005 服务器

事务将升级到 DTC。检查其他 SO 问题:TransactionScope automatically escalating to MSDTC on some machines?

解决方案是:

• 使用 SQL Server 2008 或

• 使用 SqlTransaction 而不是 TransactionScope，就像前面的答案所建议的那样:

  using (var conn = new SqlConnection(connectionString))
  {  
      using (var tx = conn.BeginTransaction())
      {
          FirstMethod(conn);
          SecondMethod(conn);
          tx.Commit();
      }
  }