Getting RavenDB working on IIS – 500.19

While trying to get RavenDB working in IIS I ran into a problem. I got the following error from IIS

HTTP Error 500.19 – Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

Module IIS Web Core
Notification BeginRequest
Handler Not yet determined
Error Code 0x80070021
Config Error This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false".
Config File \\?\C:\inetpub\ravendb\web.config

Config Source

    6: 	<system.webServer>
    7: 		<handlers>
    8: 			<add name="All" path="*" verb="*" type="Raven.Web.ForwardToRavenRespondersFactory, Raven.Web"/>

I’ve ignored some of the less interesting parts of the error message.

This can be fixed in IIS itself.

  • Open up IIS, click on the top node of the tree on the left side (the one labelled with the machine name)
  • Then double-click on the item in the centre pane marked “Feature Delegation”

  • Then find the entry marked “Handler Mappings” and set the delegation to “Read/Write” using the action links on the right side of the dialog.

When this is done the error moves on to the next part of the web.config

Config Source

    9: 		</handlers>
   10: 		<modules runAllManagedModulesForAllRequests="true">
   11: 			<remove name="WebDAVModule" />

At this point you have to also set the “Modules” to “Read/Write” also

Once that was set, I was good to go.

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