HTTP Error 500.19 0x800700b7 | Cannot add duplicate collection entry of type 'add'

Owned by Damian Kilkowski (Inactive) (Deactivated)
Last updated: Jun 10, 2022
1 min read

PROBLEM / ISSUE

The configuration website does not load and the user receives the following error message on-screen (instead of the login screen)

 

CAUSE OF THE PROBLEM

By default TFS4JIRA Synchronizer application will is created under the parent site named "Default Web Site". All children sites/applications inherit web.config setup from the parent website and the failing collection entry might be a duplicate as it is added within the parent’s web.config.

 

SOLUTION

  1. Check web.config in the parent site, TFS4JIRA web.config might be wrongly duplicated there.

  2. In child (TFS4JIRA) web.config add <remove name="DependencyScopeHttpModule" /> resulting in below

    <system.webServer> <validation validateIntegratedModeConfiguration="false" /> <modules runAllManagedModulesForAllRequests="true"> <remove name="DependencyScopeHttpModule" /> <add name="DependencyScopeHttpModule" type="SpartezSoftware.Synchronizer.IoC.ScopedDependencyHttpModule" /> </modules>

  3. Install TFS4JIRA as a separate, independent site. More information can be found here: https://appfire.atlassian.net/wiki/display/TFS4JIRA/Installing+TFS4JIRA+Synchronizer