Question

如果machine.config上没有“system.transactions”元素，那么maxTimeout的machine.config中的默认值（参见示例）是什么？

<system.transactions>
   <machineSettings maxTimeout="??:??:??" />
</system.transactions>

我问这个是因为代码因以下异常而崩溃，似乎它与超时超时的事务有关，它在SaveChanges方法期间崩溃，而我收到的异常是以下内容：

The transaction associated with the current connection has completed
but has not been disposed. The transaction must be disposed before
the connection can be used to execute SQL statements.

这是崩溃的代码：

using (TransactionScope transaction = TransactionHelper.CreateTransactionScope())
{
    using (EFContext efDBContext = new EFContext())
    {
        try
        {
            efDBContext.Connection.Open();  

            foreach (MyEntity currentEntity in myEntities)
            {
                //Insertion
            }

            transaction.Complete();
        }
        catch (Exception ex)
        {
            //Inspect current entity
            //Get Total Time of the run
            //Number of entities processed
        }
        finally
        {
            if (esfDBContext.Connection.State == ConnectionState.Open)
                esfDBContext.Connection.Close();
        }
    }
}

这就是我创建TransactionScope：

的方法

public static TransactionScope CreateTransactionScope(TransactionScopeOption option = TransactionScopeOption.Required, IsolationLevel isolationLevel = IsolationLevel.ReadCommitted)
{
    var transactionOptions = new TransactionOptions()
    {
        Timeout = TimeSpan.MaxValue,
        IsolationLevel = isolationLevel
    };

    return new TransactionScope(option, transactionOptions);
}

Answer 1

默认= 10分钟。最大= Infinity

Answer 2

没有服务器端超时是MS SQL。

客户端始终在设定的持续时间后抛出异常。

http://blogs.msdn.com/b/khen1234/archive/2005/10/20/483015.aspx

你真的想看看命令超时。

http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.commandtimeout.aspx

默认值为30秒。

在SQL中什么是默认的最大事务超时

2 个答案: