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我正在一个大型应用程序中使用 Nhibernate 和 TransactionScope。该应用程序应该修改 3 个数据库并支持它们之间的分布式事务。这是我每次想在分布式事务中查询或执行数据库上的某些 sql 时调用的代码：

IDbConnection connection = new SqlConnection(connectionString);
connection.Open();
 ISession session = SessionFactory.OpenSession(connection);

这是执行必要操作后调用的代码

IDbConnection sqlConnection = session.Connection;
if (sqlConnection != null && sqlConnection.State == ConnectionState.Open)
   sqlConnection.Close();
session.Dispose();

当我执行 update-insert-delete 语句时，我还将代码包装在其中：

using (var transaction = session.BeginTransaction())
{  //code here

transaction.Commit();}

我认为这是非常标准的东西。现在......我在这个 using 块内执行这些操作：

using (TransactionScope scope = new TransactionScope())
{
//code here
scope.Complete();
}

我的问题是我的事务在启动后大约 6 秒偶尔被中止（Transaction.Current.TransactionInformation.Status 变为中止）。

这是来自我的分布式事务协调器的跟踪：

pid=6296       ;tid=13300      ;time=04/17/2012-19:34:29.430   ;seq=1          ;eventid=TRANSACTION_MANAGER_STARTED_2            ;;"TM Identifier='(null)                                            '" ;"MS DTC started with the following settings: Security Configuration (OFF = 0 and ON = 1): Network Administration of Transactions = 0, Network Clients = 1, Inbound Transactions = 1, Outbound Transactions = 1, Transaction Internet Protocol (TIP) = 0, XA Transactions = 0, MSDTC RPC Security = Mutual Authentication Required, Account = NT AUTHORITY\NetworkService, Firewall Exclusion = 0, Transaction Bridge Installed = 0, Filtering duplicate events = 1."
pid=6296       ;tid=13300      ;time=04/17/2012-19:34:29.430   ;seq=2          ;eventid=TRACE_SETTINGS                           ;;"TM Identifier='(null)                                            '" ;"Trace Configuration (OFF = 0 and ON = 1): Tracing Of DTC = 1, Tracing Of Transactions = 1, Tracing Of Aborted Transactions = 1, Tracing Of Long-Lived Transactions = 1, Tracing Of All Transactions = 0, Max Limit on Memory Buffers = 0."
pid=6296       ;tid=11372      ;time=04/17/2012-19:35:19.496   ;seq=3          ;eventid=CHECKPOINTING_STOPPED                    ;;"TM Identifier='(null)                                            '" ;"MSDTC is suspending the checkpointing of transactions due to lack of activity"
pid=6296       ;tid=11372      ;time=04/17/2012-19:35:19.496   ;seq=4          ;eventid=TRACING_STOPPED                          ;;"TM Identifier='(null)                                            '" ;"MSDTC is suspending the tracing of long - lived transactions due to lack of activity"
pid=6296       ;tid=10520      ;time=04/17/2012-19:36:31.191   ;seq=5          ;eventid=TRACING_STARTED                          ;;"TM Identifier='(null)                                            '" ;"MSDTC is resuming the tracing of long - lived transactions"
pid=6296       ;tid=10520      ;time=04/17/2012-19:36:31.212   ;seq=6          ;eventid=TRANSACTION_BEGUN                        ;tx_guid=5c61419a-eec2-49c1-aaa1-007645a72e32     ;"TM Identifier='(null)                                            '" ;"transaction has begun, description :'user_transaction'"
pid=6296       ;tid=10520      ;time=04/17/2012-19:36:31.212   ;seq=7          ;eventid=RM_ENLISTED_IN_TRANSACTION               ;tx_guid=5c61419a-eec2-49c1-aaa1-007645a72e32     ;"TM Identifier='(null)                                            '" ;"resource manager #1001 enlisted as transaction enlistment #1. RM guid = 'b9290b2d-9e1d-43ed-a5f3-e417f9b17906'"
pid=6296       ;tid=8016       ;time=04/17/2012-19:36:36.141   ;seq=8          ;eventid=RECEIVED_ABORT_REQUEST_FROM_BEGINNER     ;tx_guid=5c61419a-eec2-49c1-aaa1-007645a72e32     ;"TM Identifier='(null)                                            '" ;"received request to abort the transaction from beginner"
pid=6296       ;tid=8016       ;time=04/17/2012-19:36:36.141   ;seq=9          ;eventid=TRANSACTION_ABORTING                     ;tx_guid=5c61419a-eec2-49c1-aaa1-007645a72e32     ;"TM Identifier='(null)                                            '" ;"transaction is aborting"
pid=6296       ;tid=8016       ;time=04/17/2012-19:36:36.141   ;seq=10         ;eventid=RM_ISSUED_ABORT                          ;tx_guid=5c61419a-eec2-49c1-aaa1-007645a72e32     ;"TM Identifier='(null)                                            '" ;"abort request issued to resource manager #1001 for transaction enlistment #1"
pid=6296       ;tid=8016       ;time=04/17/2012-19:36:36.219   ;seq=11         ;eventid=RM_ACKNOWLEDGED_ABORT                    ;tx_guid=5c61419a-eec2-49c1-aaa1-007645a72e32     ;"TM Identifier='(null)                                            '" ;"received acknowledgement of abort request from the resource manager #1001 for transaction enlistment #1"
pid=6296       ;tid=8016       ;time=04/17/2012-19:36:36.219   ;seq=12         ;eventid=TRANSACTION_ABORTED                      ;tx_guid=5c61419a-eec2-49c1-aaa1-007645a72e32     ;"TM Identifier='(null)                                            '" ;"transaction has been aborted"

有谁知道我做错了什么以及如何防止我的交易被中止？先感谢您。

更新 1： 如果我在实例化 transactionscope 对象后立即打开 2 个会话和 2 个数据库，那么我会收到上述错误。如果我只是打开一个数据库的会话，然后我打开一个会话对其他数据库之一，我会收到以下错误：

The PROMOTE TRANSACTION request failed because there is no local transaction active.

当达到 connection.Open() 并且正在向第二个数据库打开连接时，就会发生这种情况。

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1 回答 1

1

不知道这是否有助于跨多个数据库我没有在那种情况下测试过这段代码。这是我如何处理事务的示例。

 public interface ISessionManager : IDisposable
{
    ISession Session { get; set; }
    ISession GetSession();
}

public class SessionManager : ISessionManager
{
    private readonly ISessionFactory _sessionFactory;
    private TransactionScope _scope;
    public SessionManager(ISessionFactory sessionFactory)
    {
        _sessionFactory = sessionFactory;
    }

    #region ISessionManager Members

    public ISession Session { get; set; }

    public ISession GetSession()
    {
        if (Session == null)
        {
            Session = _sessionFactory.OpenSession();
            if (!CurrentSessionContext.HasBind(_sessionFactory))
            {
                _scope = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions {IsolationLevel = System.Transactions.IsolationLevel.ReadCommitted});
                Session.BeginTransaction(IsolationLevel.ReadCommitted);
                CurrentSessionContext.Bind(Session);
            }
        }

        Session = _sessionFactory.GetCurrentSession();
        Session.FlushMode = FlushMode.Never;
        return Session;
    }


    public void Dispose()
    {
        if (CurrentSessionContext.HasBind(_sessionFactory))
        {
            CurrentSessionContext.Unbind(_sessionFactory);
        }
        try
        {
            Session.Transaction.Commit();
            _scope.Complete();
            _scope.Dispose();
            Session.Flush();
        }
        catch (Exception)
        {
            Session.Transaction.Rollback();
            throw;
        }
        finally
        {
            Session.Close();
            Session.Dispose();
        }
    }

    #endregion
}
于 2012-04-19T17:31:05.170 回答