当我编辑 web.config 时会发生什么？

我需要在一个活动的 Sharepoint 环境中编辑 web.config 文件，但是我不确定如果我这样做会发生什么(我想输出自定义错误)。

这会导致 IIS6工人过程的回收吗？

活动用户会因此丢失会话状态吗？

或者我可以安全地编辑文件吗？

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最佳答案

The application pool will restart and session state will be lost. Imagine each ASP.NET application (as defined in IIS) is a program on the desktop. Saving web.config will do something similar to closing the program and reopening it.

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  1. Yes. It will be recycled.
  2. Yes. They will lose their session.
  3. Yes. You can safely edit the file. I suggest you to read this MSDN article : Working with web.config Files in Windows SharePoint Services
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As already mentioned by some people: the application pool of the site in IIS will restart (this typically takes a couple of seconds). As a result the next page request(s) will be slower (since nothing will be cached anymore). Also the session state of the users will be lost; BUT in WSS session state is not used by default, in MOSS it is used by InfoPath Form Services. So it could be that you don't have big issues related to losing session state.

On the other side; to overcome those issues: what is typically done is to create a SharePoint Solution (WSP) that deploys and starts a Timer Job to make the changes to the web.config from code (using the SPWebConfigModification class of the Object Model). The nice thing is that you can schedule the execution of the change, so your users won't notice it.

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Also if Session state is configured as out-of-process (database or service) then recycling the app pool won't lose any session state. This is as true for Sharepoint as it is for vanilla ASP.Net.

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When you edit the web.config, It will restart the AppDomain (NOT AppPool) of that web application and clears the all occupied resources and memory. So other web applications running under that App Pool will not be affected. Also it will clear the sessions (in-proc) and memory cache.


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