Saga 完成导致分布式事务完成错误

Question

处理顺序：

• Saga 消息处理程序接收包含数据项的第一条消息。
• 消息处理程序使用具有自己的数据库事务的业务对象。
• 如果项目更新正常，则数据库事务提交并且 saga 完成。
• Saga 消息处理程序接收包含数据项的第二条消息。
• 消息处理程序在尝试打开新的数据库事务时抛出异常，如上所述。

错误消息：

System.Data.SqlClient.SqlException (0x80131904): Distributed transaction completed. Either enlist this session in a new transaction or the NULL transaction.

堆栈跟踪：

2012-01-27 14:07:47,407 [Worker.9] ERROR 

LawCover.LISServices.LISBankAgent.SagaMessageHandler [(null)] - Exception details
System.Data.SqlClient.SqlException (0x80131904): Distributed transaction completed. Either enlist this session in a new transaction or the NULL transaction.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParser.TdsExecuteTransactionManagerRequest(Byte[] buffer, TransactionManagerRequestType request, String transactionName, TransactionManagerIsolationLevel isoLevel, Int32 timeout, SqlInternalTransaction transaction, TdsParserStateObject stateObj, Boolean isDelegateControlRequest)
   at System.Data.SqlClient.SqlInternalConnectionTds.ExecuteTransactionYukon(TransactionRequest transactionRequest, String transactionName, IsolationLevel iso, SqlInternalTransaction internalTransaction, Boolean isDelegateControlRequest)
   at System.Data.SqlClient.SqlInternalConnectionTds.ExecuteTransaction(TransactionRequest transactionRequest, String name, IsolationLevel iso, SqlInternalTransaction internalTransaction, Boolean isDelegateControlRequest)
   at System.Data.SqlClient.SqlInternalConnection.BeginSqlTransaction(IsolationLevel iso, String transactionName)
   at System.Data.SqlClient.SqlConnection.BeginTransaction(IsolationLevel iso, String transactionName)
   at System.Data.SqlClient.SqlConnection.BeginTransaction()
   at LawCover.LIS.DataAccess.ConnectionManager.BeginTransaction()
   at LawCover.LISServices.LISBankAgent.LISMethods.AddCreditCardPaymentSettlementScheduleItemsAndReceiptsIntoLISForCurrentMessages(BankResponseFileProcessed message) in C:\Projects\LIS Improvements\LIS\Source\LISServices\LISBankAgent\LISMethods.cs:line 53
   at LawCover.LISServices.LISBankAgent.SagaMessageHandler.Handle(BankResponseFileProcessed message) in C:\Projects\LIS Improvements\LIS\Source\LISServices\LISBankAgent\SagaMessageHandler.cs:line 177

有相当多的代码涵盖了上述流程，但我很高兴发布有用的代码。

Answer 1

我剥离了事务，发现 saga 处理程序正在打开另一个数据库连接，并且默认情况下，该连接已登记在 DTC 中。我在连接字符串中添加了“Enlist=false”，因为需要捕获数据库抛出的异常并进行相应处理，而不是破坏分布式事务。现在它的行为符合预期。

感谢您的意见，我将重新审视代码并采纳您的意见。