asp.net - 是什么导致 “The client disconnected” ASP.NET异常？

Question

我的.NET 3.5应用程序偶尔会抛出以下异常System.Web异常:

The client disconnected

为什么会发生这种异常？我的应用程序在负载平衡的Windows Server 2003 IIS 6.0服务器上运行。

Answer 1

vbdork.net域现在似乎已消失。在搜索此错误时，我找到了对本文的一些引用。所以我找到了它的google缓存版本，现在将其发布在这里以供引用。原始网址为:http://vbdork.net/post/2009/02/10/The-client-disconnected.aspx

You get the message The client Disconnected.

You're likely to sporadically get this error message if you're in a web farm and you have a page where the user can make multiple selections, it typically happens in this scenario:

The user selects a drop down list box that has an event on postback, but the user does this again before the request is sent back to the user, the user is now creating a second event that is being fired on the other webserver, the previous webserver tries to return the results of the old event to the user but the user is no longer there because the user is now on the other webserver.

The user will never see an error, but if you're catching the errors and emailing/logging them you'll see them like shown below and be totally frustrated. Don't worry about it, just ignore it it's not even an problem, as long as you're trapping this kind of error nothing will go wrong.

Type : System.Web.HttpException, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Message : The client disconnected.
Source : System.Web
Help link :
ErrorCode : -2147467259
Data : System.Collections.ListDictionaryInternal
TargetSite : Void ThrowError(System.Exception, System.String, System.String, Boolean)
Stack Trace :    at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError)
           at System.Web.UI.HiddenFieldPageStatePersister.Load()
           at System.Web.UI.Page.LoadPageStateFromPersistenceMedium()
           at System.Web.UI.Page.LoadAllState()
           at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
           at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
           at System.Web.UI.Page.ProcessRequest()
           at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
           at System.Web.UI.Page.ProcessRequest(HttpContext context)
           at ASP.src_rptprefs_chainhierarchy_aspx.ProcessRequest(HttpContext context)
           at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
           at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

        Inner Exception
        ---------------
        Type : System.Web.UI.ViewStateException, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
        Message : Invalid viewstate.

Client IP: 10.21.4.8
Port: 46784
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; InfoPath.1; .NET CLR 1.1.4322; MS-RTC LM 8)