SharePoint BlobCache 报 Access Denied

今天突然发现微软Knowledge Base Article的ID号升级了, 从原来的六位变成七位了, 呵呵. 微软出KB文档还是挺快, 挺多的.

错误信息

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Access to the path 'DRIVE:\blobCache\#########2\' is denied.

Call Stack

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System.UnauthorizedAccessException: Access to the path 'DRIVE:\blobCache\#########2\' is denied.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, DirectorySecurity dirSecurity)
at System.IO.Directory.CreateDirectory(String path, DirectorySecurity directorySecurity)
at Microsoft.SharePoint.Publishing.BlobCache.CreateDirectory(String directoryName)
at Microsoft.SharePoint.Publishing.BlobCache.WriteIndex(Boolean tokensOnly)
at Microsoft.SharePoint.Publishing.BlobCache.WriteIndex()
at Microsoft.SharePoint.Publishing.BlobCache.<>c__DisplayClass14.<>c__DisplayClass17.<FetchItemFromWss>b__11()
at Microsoft.Office.Server.Diagnostics.FirstChanceHandler.ExceptionFilter(Boolean fRethrowException, TryBlock tryBlock, FilterBlock filter, CatchBlock catchBlock, FinallyBlock finallyBlock)

An error occured in the blob cache. The exception message was 'Access to the path 'DRIVE:\blobCache\#########2\' is denied.'.

解决方案

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1. Use a different root blobcache folder for each application.

To work around this issue you can specify a different folder when configuring blob caching for each web application in the web.config.
<BlobCache location="DRIVE:\blobCache" path="\.(gif|jpg|png|css|js)$" maxSize="10" max-age="86400" enabled="True"/>
If you set the BlobCache locations to the following you should avoid this problem:
         Web Application Location
         First   DRIVE:\blobCache
         Second   DRIVE:\blobCachetwo
         Third   DRIVE:\blobCachethree

2. Manually give <LOCALMACHINE>\WSS_WPG full control to DRIVE:\BlobCache.

3. Use the same app pool account for any applications you plan to enable blobcaching on.

来源:

Error: "Access to the path 'DRIVE:\blobCache\##########\' is denied." when using SharePoint webapps with different application pool identities

http://support.microsoft.com/kb/2015895