专注于web技术，但是不要沉湎于其中，开心就好！
　　
　　
　　
　　
　　
　　
　　
　　
　　
　　
　　
　　
　　前段时间公司为了减轻服务器压力，对网页做了集群，分布在多台服务器，通过DNS轮回解析到各台服务器，结果页面只要打开停留到DNS解析到下一个地址，就会出现出下错误信息。
　　Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that  configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. 
　　Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 
　　Exception Details: System.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that  configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
　　Source Error: 
　　The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:
　　1. Add a "Debug=true" directive at the top of the file that generated the error. Example:
　　
　　or:
　　2) Add the following section to the configuration file of your application:
　　
　　
　　
　　
　　
　　Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.
　　Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.  
　　Stack Trace: 
　　[HttpException (0x80004005): Unable to validate data.]
　　System.Web.Configuration.MachineKeySection.GetDeco dedData(Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength) +294
　　System.Web.UI.ObjectStateFormatter.Deserialize(Str ing inputString) +203
　　[ViewStateException: Invalid viewstate. 
　　Client IP: 218.28.26.86
　　Port: 45262
　　User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; FDM)
　　ViewState: /wEPDwUKLTQzMDM1NDM2MA9kFgRmDxYCHgRUZXh0BdEbdmFyIH NBcnIgPSBuZXcgQXJyYXkoKTtzQXJyWzE1XT1uZXcgQXJyYXkoK TtzQXJyWzE1XVswXT0xO3NBcnJbMTVdWzFdPWZhbHNlO3NBcnJb MTVdWzNdPTA7c0FyclsxNV1bMl09dHJ1ZTtzQXJyWzM4XT1uZXc gQXJyYXkoKTtzQXJyWzM4XVswXT0wO3NBcnJbMzhdWzFdPXRydW U7c0FyclszOF1bM109MTtzQXJyWzM4XVsyXT10cnVlO3NBcnJbN 109bmV3IEFycmF5KCk7c0Fycls3XVswXT0yO3NBcnJbN11bMV09 ZmFsc2U7c0Fycls3XVszXT0wO3NBcnJbN11bMl09dHJ1ZTtzQXJ yWzZdPW5ldyBBcnJheSgpO3NBcnJbNl1bMF09MDtzQXJyWzZdWz FdPWZhbHNlO3NBcnJbNl1bM109MTtzQXJyWzZdWzJdPXRydWU7c 0FyclszN109bmV3IEFycmF5KCk7c0FyclszN11bMF09MDtzQXJy WzM3XVsxXT10cnVlO3NBcnJbMzddWzNdPTE7c0FyclszN11bMl0 9dHJ1ZTtzQXJyWzEzXT1uZXcgQXJyYXkoKTtzQXJyWzEzXVswXT 00O3NBcnJbMTNdWzFdPWZhbHNlO3NBcnJbMTNdWzNdPTA7c0Fyc lsxM11bMl09dHJ1ZTtzQXJyWzMzXT1uZXcgQXJyYXkoKTtzQXJy WzMzXVswXT0wO3NBcnJbMzNdWzFdPWZhbHNlO3NBcnJbMzNdWzN dPTE7c0FyclszM11bMl09dHJ1ZTtzQXJyWzM0XT1uZXcgQXJyYX koKTtz...]
　　[HttpException (0x80004005): Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that  configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.]
　　System.Web.UI.ViewStateException.ThrowError(Except ion inner, String persistedState, String errorPageMessage, Boolean macValidationError) +267
　　System.Web.UI.ObjectStateFormatter.Deserialize(Str ing inputString) +282
　　System.Web.UI.ObjectStateFormatter.System.Web.UI.I StateFormatter.Deserialize(String serializedState) +4
　　System.Web.UI.Util.DeserializeWithAssert(IStateFor matter formatter, String serializedState) +37
　　System.Web.UI.HiddenFieldPageStatePersister.Load() +198
　　System.Web.UI.Page.LoadPageStateFromPersistenceMed ium() +83
　　System.Web.UI.Page.LoadAllState() +35
　　System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +7350
　　System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +213
　　System.Web.UI.Page.ProcessRequest() +86
　　System.Web.UI.Page.ProcessRequestWithNoAssert(Http Context context) +18
　　System.Web.UI.Page.ProcessRequest(HttpContext context) +49
　　ASP.admin_articleadd_aspx.ProcessRequest(HttpConte xt context) +4
　　System.Web.CallHandlerExecutionStep.System.Web.Htt pApplication.IExecutionStep.Execute() +358
　　System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean& completedSynchronously) +64
　　解决方法：
　　解决方案(1) 
　　处理页面增加 
　　 
　　解决方案(2)推荐