IIS WAS 错误，eventId 为 5172，导致 AppPool 不稳定

Question

我遇到了一个间歇性问题，即 IIS 站点每月离线几次。事件日志显示以下错误：

Source :  WAS  
EventID:  5053  
Message:  The Windows Process Activation Service received a change
          notification, but was unable to process it correctly.  

Source :  WAS  
EventID: 5172  
Message: The Windows Process Activation Service encounter an error 
         trying to read the configuration data from file 
         \\?\UNC\domain\dfs\iis-config-folder\applicationHost.config

随后出现错误

Source : IIS-APPHOSTSVC  
EventID: 9012 (invalid applicationHost.config),
         9006 (processing config errors), and often 
         9000 (SID mapping)

SID 解析的需求是否会触发这些事件？该站点配置为仅使用匿名身份验证，因此我不确定为什么需要 SID 映射。

我已尝试但无法找到有关配置 WAS 的良好信息。

在 Win2012R2 上运行 IIS 8.5。