对于繁重的应用程序,我的linq在PerCall实例化模式下由WCF服务访问.这个应用程序有几个调用服务的线程,并且有几个应用程序同时运行.

我经常发生一些EntityException：

System.Data.EntityException was caught
Message=An error occurred while starting a transaction on the provider connection. See the inner exception for details.
Source=System.Data.Entity
StackTrace:
at System.Data.EntityClient.EntityConnection.BeginDbTransaction(IsolationLevel isolationLevel)
at System.Data.EntityClient.EntityConnection.BeginTransaction()
at System.Data.Objects.ObjectContext.SaveChanges(SaveOptions options)
at Infoteam.GfK.TOMServer.DataServer.DataServer.SaveChanges() in D:\Workspace\XYZWASDF\DataServer\DataServer.cs:line 123
InnerException: System.Data.sqlClient.sqlException
Message=Une nouvelle transaction n’est pas autorisée parce que d’autres threads sont en cours d’exécution dans la session.
Source=.Net sqlClient Data Provider
ErrorCode=-2146232060
Class=16
LineNumber=1
Number=3988
Procedure=””
Server=ift-srv114
State=1
StackTrace:
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,IsolationLevel iso,sqlInternalTransaction internalTransaction,Boolean isDelegateControlRequest)
at System.Data.sqlClient.sqlInternalConnectionTds.ExecuteTransaction(TransactionRequest transactionRequest,String name,Boolean isDelegateControlRequest)
at System.Data.sqlClient.sqlInternalConnection.BeginsqlTransaction(IsolationLevel iso,String transactionName)
at System.Data.sqlClient.sqlInternalConnection.BeginTransaction(IsolationLevel iso)
at System.Data.sqlClient.sqlConnection.BeginDbTransaction(IsolationLevel isolationLevel)
at System.Data.Common.DbConnection.BeginTransaction(IsolationLevel isolationLevel)
at System.Data.EntityClient.EntityConnection.BeginDbTransaction(IsolationLevel isolationLevel)
InnerException:

(对不起,它不太可读). (内部异常的消息表示“由于会话中正在运行其他线程,因此不允许新事务.”

我已经检查过,我不是在一个循环中,当它出现这种异常时它是纯粹随机的,我不知道如何避免这种情况.

任何帮助将非常感激:)

谢谢！

编辑：这是我得到这个例外的例子有时候

//My DataServer method,which is a singleton

    [MethodImpl(MethodImplOptions.Synchronized)]
            public void SaveChanges()
            {
                lock (_lockObject)
                {
                    try
                    {
                        _context.SaveChanges(SaveOptions.AcceptAllChangesAfterSave);
                        _changeListener.ManageIDAfterInsert();                       
                    }
                    catch (Exception ex)
                    {
                        Logger.Instance.Error("[DataServer:SaveChanges] Got an error when trying to save an object",ex);
                        //HERE I've this error
                    }
                }
            }

//One example where I can have exception sometimes,this is called through a WCF service,so I have a method which attach the object and then save it
private OrderStatus AddOrderStatus(OrderStatus orderStatus)
        {
            DataServer.DataServer.Instance.InsertOrUpdateDetachedObject(orderStatus);

            return orderStatus;
        }