采用负载均衡,部署了两个ASP.NET 2.0的站点服务器碰到的问题
采用负载均衡服务器的情况下部署两台站点服务器，碰到几个问题及他们的解决办法。
1. 当将发布好的站点文件copy到IIS目录下，配制好IIS对Framework的支持，访问网站，始终出现Service Unavailable两个大字，郁闷....搜索一番，发现了解决办法：
打开IIS的websites文件夹的属性，然后到Service选项卡，钩选Run WWW service in IIS 5.0 isolation mode.
如下图：
这样设置后，我们的站点在本机终于可以打开了。
2. 配置第二台Web Server时，按照第一台的步骤部署配置完成，打开网页，出现下面的错误：
This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem. (Exception from HRESULT: 0x800736B1)
FileLoadException: Could not load file or assembly 'acPDFCreatorLib.Net, Version=3.0.2735.26202, Culture=neutral, PublicKeyToken=8aedc7a81d17941d' or one of its dependencies. This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem. (Exception from HRESULT: 0x800736B1)]
System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +0
System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +211
System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +141
System.Reflection.Assembly.Load(String assemblyString) +25
System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +32
这里引用了一个第三方的程序集做PDF->XPS的转换。奇怪，第一台服务器没有任何问题，部署配置是一样的，包括文件都是同一个拷贝，而第二台服务器出现这个错误。最后发现是缺少Visual C++ 2005 Redistributable Package，下载安装后，问题解决了。
3. 两台Web Server配置完成了，在本地都可以运行了，下面就访问事先做好的域名（指向均衡负载服务器），首页打开了，输入帐号密码登陆，又出现问题了！大黄页：
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
经过搜索找到了解决办法，经如此简单，web.config做如下修改：
<system.web>
<pages enableViewStateMac="false" />
</system.web>
终于好了，一切正常了！
1. 当将发布好的站点文件copy到IIS目录下，配制好IIS对Framework的支持，访问网站，始终出现Service Unavailable两个大字，郁闷....搜索一番，发现了解决办法：
打开IIS的websites文件夹的属性，然后到Service选项卡，钩选Run WWW service in IIS 5.0 isolation mode.
如下图：
这样设置后，我们的站点在本机终于可以打开了。
2. 配置第二台Web Server时，按照第一台的步骤部署配置完成，打开网页，出现下面的错误：
This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem. (Exception from HRESULT: 0x800736B1)FileLoadException: Could not load file or assembly 'acPDFCreatorLib.Net, Version=3.0.2735.26202, Culture=neutral, PublicKeyToken=8aedc7a81d17941d' or one of its dependencies. This application has failed to start because the application configuration is incorrect. Reinstalling the application may fix this problem. (Exception from HRESULT: 0x800736B1)] System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) +0 System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +211 System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +141 System.Reflection.Assembly.Load(String assemblyString) +25 System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +32这里引用了一个第三方的程序集做PDF->XPS的转换。奇怪，第一台服务器没有任何问题，部署配置是一样的，包括文件都是同一个拷贝，而第二台服务器出现这个错误。最后发现是缺少Visual C++ 2005 Redistributable Package，下载安装后，问题解决了。
3. 两台Web Server配置完成了，在本地都可以运行了，下面就访问事先做好的域名（指向均衡负载服务器），首页打开了，输入帐号密码登陆，又出现问题了！大黄页：
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.经过搜索找到了解决办法，经如此简单，web.config做如下修改：
<system.web> <pages enableViewStateMac="false" /> </system.web>终于好了，一切正常了！
