Mike Volodarsky's blog

Formerly the core server PM for IIS 7.0 and ASP.NET, now I run LeanSentry.
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Remove zombie websites from your IIS server

Zombie websites get created whenever the root application of a website is removed, orphaning the rest of the application content in your website.

Because IIS requires the root of the website to be an application, this effectively renders the website inaccessible:

  • It cannot serve requests
  • It does not show up in InetMgr
  • It will likely break many administrative or configuration actions
Just for reference, here is what this looks like in your applicationHost.config:


     <application path="/child1"> <!-- Where is the root app?


(Note: if you remove a parent application that is NOT the root of the site, things will still work fine - even though the child apps may be considered orphaned, they are actually not.  The only change that happens is that content at the parent application's level becomes part of the root application)

Surprisingly, this is actually easy to end up with - just delete the root application of a website instead of deleting the website itself - e.g. by running appcmd delete app "Default Web Site/". Then try to browse to localhost :) .

There is a good article describing how to find these here: Hunting zombies: how to remove orphaned IIS web applications. However, the article does not actually tell you how to remove them, and since you cannot easily remove them from InetMgr, many users seem to be out of luck.

After trying to help a user on the IIS forums here to remove a zombie app, I decided to write a quick tool to do it.

So, here you go:

Download the tool: http://mvolo.com/wp-content/uploads/2012/11/RemoveOrphanedSites.zip.

To run it:

> RemoveOrphanedSites.exe /site:all      <-- Shows all orphaned sites ONLY, does not remove

> RemoveOrphanedSites.exe /site:all /remove     <-- Removes all orphaned sites

> RemoveOrphanedSites.exe "/site:Default Web Site"     <-- Checks if the specific site is orphaned

> RemoveOrphanedSites.exe   <-- Displays help, how to connect to remote servers, etc

Hope this helps everyone who has this problem.



Blogging again!

After a long pause in writing on this blog, I am excited to be back.

Its been a very crazy time at LeanServer, where we've been working on a number of high-scalability projects for the Windows web platform with some big companies including vevo.com, the orchard, Microsoft, and so on.

However, perhaps the biggest thing that has been consuming my time has been LeanSentry - a new startup we started over a year ago to build the best application monitoring and performance tuning service for Windows server applications.  Read More...