1

我有一个用 c# 编写的 IIS 托管 Web 应用程序。在服务调用中，它会创建一个新的 AppDomain 并在加载后执行一个 dll。当执行时间超过 10 分钟时，我收到以下远程处理异常：

System.Runtime.Remoting.RemotingException：对象“/a3178091_1732_4272_b0bd_dae31e328450/lwntwiaw53jg1rd9gbvsigbe_25.rem”已断开连接或在服务器上不存在。

服务器堆栈跟踪：

在 System.Runtime.Remoting.Channels.ChannelServices.CheckDisconnectedOrCreateWellKnownObject（IMessage 消息）

在 System.Runtime.Remoting.Channels.ChannelServices.SyncDispatchMessage（IMessage 消息）

在 [0] 处重新抛出异常：

在 System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage（IMessage reqMsg，IMessage retMsg）

在 System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke（MessageData& msgData，Int32 类型）

在 System.IO.Stream.set_Position（Int64 值）

我创建应用程序域的方式如下

    private AppDomain CreateDomainForTaskExecution(string baseDirectory)
    {
        AppDomainSetup domainSetup = new AppDomainSetup();
        domainSetup.ApplicationBase = baseDirectory;
        domainSetup.PrivateBinPath = baseDirectory;
        return AppDomain.CreateDomain("Domain for task execution", null, domainSetup);
    }

然后我在服务调用中调用远程对象。

   newDomain = CreateDomainForTaskExecution(domainBaseDir);


            IExecutableTaskFactory taskLocator = (IExecutableTaskFactory)newDomain.CreateInstanceFromAndUnwrap(taskAssemblyFile.FullName, this.ExecutableTaskFactoryFullName);
            IExecutableTask executableTask = taskLocator.Create();
    IList<uint> ouputArguments = executableTask.OutputArgumentNames;

        IDictionary<uint, Stream> taskOutput = new Dictionary<uint, Stream>();
        foreach (uint argument in ouputArguments)
        {
            MarshalByRefObject stream = new MemoryStream();
            taskOutput[argument] = stream as Stream;
            ILease lease = (ILease)stream.InitializeLifetimeService();
            if (lease.CurrentState == LeaseState.Initial)
            {
                lease.InitialLeaseTime = TimeSpan.Zero;
                //lease.SponsorshipTimeout = TimeSpan.FromMinutes(30);
                //lease.RenewOnCallTime = TimeSpan.FromMinutes(30);
            }
            lease.Register(this);
        }

        // Register as a sponsor.
        foreach (Stream stream in inputArguments.Values)
        {
            ILease lease = (ILease)stream.InitializeLifetimeService();
            if (lease.CurrentState == LeaseState.Initial)
            {
                lease.InitialLeaseTime = TimeSpan.Zero;
                //lease.SponsorshipTimeout = TimeSpan.FromMinutes(30);
                //lease.RenewOnCallTime = TimeSpan.FromMinutes(30);
            }
            lease.Register(this);
        }

        executableTask.Execute(inputArguments, taskOutput);
        return taskOutput;

taskLocator 是 MarshalByRefObject 并覆盖 InitializeLifetimeService() 函数，如下所示：

    public override object InitializeLifetimeService()
    {
        ILease lease = (ILease)base.InitializeLifetimeService();
        if (lease.CurrentState == LeaseState.Initial)
        {
            lease.InitialLeaseTime = TimeSpan.Zero;
            //lease.SponsorshipTimeout = TimeSpan.FromMinutes(30);
            //lease.RenewOnCallTime = TimeSpan.FromMinutes(30);
        }
        return lease;
    }

executableTask 也是 MarshalByRefObject 并且类似地尝试获得无限制的租约，如上所述。

我也试图让我的服务对象成为一个 ISponsor 并且在 Renew 我做

    public TimeSpan Renewal(ILease lease)
    {
        return TimeSpan.FromMinutes(5);
    }

但是从不调用 Renewal。我已经在 Google 上查找了所有链接和堆栈溢出，但找不到解决方案。可能是什么问题？

4

0 回答 0