调试时的Windows Azure缓存 - 请求超时

时间:2013-02-20 19:23:24

标签: azure azure-caching

使用模拟器的Windows Azure缓存时遇到问题(即在本地,而不是云端)。

我的系统配置是:

  • Windows 8
  • Visual Studio 2012 Update 1
  • Azure SDK和Emulator 1.8
  • Windows Azure Caching 1.8.1
  • Web API
  • .NET 4.5

问题是:我们的服务器利用(角色)Windows Azure缓存进行会话管理等。一旦服务器收到来自客户端的请求,它就开始与Windows Azure缓存进行通信以放置/获取一些对象(例如,会话对象) )。然后发生“超时”异常(Microsoft.ApplicationServer.Caching.DataCacheException),服务器无响应,在Visual Studio的输出日志中显示以下消息。

...
iisexpress.exe Error: 0 : ERROR: <DistributedCache.RoutingClient> 25cb6980-94c5-4e72-  adee-cd58defff7fe:SendMsgAndWait: Request TimedOut, msgId = 77

A first chance exception of type 'Microsoft.ApplicationServer.Caching.DataCacheException' occurred in Microsoft.ApplicationServer.Caching.Client.dll

'iisexpress.exe' (Managed (v4.0.30319)): Loaded 'C:\windows\assembly\GAC_MSIL\Microsoft.VisualStudio.Debugger.Runtime\11.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.Debugger.Runtime.dll'
iisexpress.exe Error: 0 : The thread '<No Name>' (0x16d0) has exited with code 0 (0x0).

The thread '<No Name>' (0x1a00) has exited with code 0 (0x0).
The thread '<No Name>' (0x2298) has exited with code 0 (0x0).

ERROR: <DistributedCache.RoutingClient> e91ff46b-870c-4d83-8eef-6bdb718baab9:SendMsgAndWait: Request TimedOut, msgId = 78

iisexpress.exe Warning: 0 : Microsoft.WindowsAzure.ServiceRuntime Verbose: 500 : Role instance status check starting

Microsoft.WindowsAzure.ServiceRuntime Verbose: 502 : Role instance status check succeeded: Ready

WARNING: <SimpleSendReceiveModule> DeadServerCallback Called, Server URI: [net.tcp://127.255.0.0:20004], Underlying exception - 

A first chance exception of type 'Microsoft.ApplicationServer.Caching.DataCacheException' occurred in Microsoft.ApplicationServer.Caching.Client.dll

iisexpress.exe Warning: 0 : WARNING: <SimpleSendReceiveModule> DeadServerCallback Called, Server URI: [net.tcp://127.255.0.0:20004], Underlying exception - 

iisexpress.exe Warning: 0 : WARNING: <SimpleSendReceiveModule> DeadServerCallback: Matches My Server, Cleaning Pending Requests

iisexpress.exe Warning: 0 : WARNING: <SimpleSendReceiveModule> 48c1dd7f-f54d-40a8-9990-25af48b91eb1:Request - 79, result - Status=SendFailed[System.Net.Sockets.SocketException (0x80004005): An existing connection was forcibly closed by the remote host

   at System.Net.Sockets.Socket.Send(IList`1 buffers)

   at Microsoft.ApplicationServer.Caching.TcpSocketChannel.Send(IList`1 buffers, TimeSpan timeout)]

iisexpress.exe Warning: 0 : WARNING: <SimpleSendReceiveModule> DeadServerCallback: Matches My Server, Cleaning Pending Requests

A first chance exception of type 'Microsoft.ApplicationServer.Caching.DataCacheException' occurred in Microsoft.ApplicationServer.Caching.Client.dll

iisexpress.exe Warning: 0 : WARNING: <DistributedCache.SocketClientChannel.1> Request 81 to host net.tcp://127.255.0.0:20004/ failed Status=ChannelOpening

iisexpress.exe Warning: 0 : WARNING: <DistributedCache.SocketClientChannel.1> Request 80 to host net.tcp://127.255.0.0:20004/ failed Status=ChannelOpening

iisexpress.exe Warning: 0 : WARNING: <SimpleSendReceiveModule> 8ec8ff74-1f04-49da-8ff5-529d0697542f:Request - 81, result - Status=ChannelOpening

iisexpress.exe Warning: 0 : A first chance exception of type 'Microsoft.ApplicationServer.Caching.DataCacheException' occurred in Microsoft.ApplicationServer.Caching.Client.dll

当这种情况开始时,服务器刚刚关闭(即正在运行,但没有响应)。

知道为什么会这样吗?它与Windows 8有关吗?

谢谢,

2 个答案:

答案 0 :(得分:1)

我也遇到了这个问题,并将其追溯到一台机器上的Hyper-V虚拟以太网适配器。禁用我安装的两个适配器修复了Azure缓存中的超时错误。在这台机器上,我可以继续保持与网络/互联网的连接。

在另一台机器上没有安装Hyper-V,并且禁用以太网适配器(断开与互联网的连接)“修复”了这个问题。因此,要运行我的应用程序,我必须首先断开与网络的连接。

在这两台计算机上,开发Azure缓存在执行缓存服务器的IP查找(例如127.255.0.0,127.255.0.1,127.255.0.2等)时似乎有问题,它适用于少数请求,然后开始超时。当与网络断开连接时,它始终有效。

在我开始遇到问题之前,这两台Windows 8计算机上的这个工作正常。

更新

刷新DNS缓存为我修复此问题,现在它在连接到网络时可以正常工作。 ipconfig /flushdns

答案 1 :(得分:0)

我还没有完全确认这一点,但问题似乎与天蓝色缓存dll中的遗留协议有关。

我能够通过在默认缓存上运行此配置来解决此问题:

<dataCacheClient name="default" isCompressionEnabled="false" maxConnectionsToServer="4" useLegacyProtocol="false" >

希望这有帮助