Upgrading our .Net applications from one environment to another is always painful. Even if its a upgrade from the Windows operating system version or the upgrade of .Net framework version. Basically it should be done in the development environment first and then in the QA environment. Also before performing upgrade in the development environment the developers should be having enough knowledge about the differences between existing plan form and new plat form. Also they need to cross verify what all features will be affected by the changes and should plan the mitigation.
Being said all those theories, its not practical always to do upgrade after all these analysis in tight scheduled projects. Recently I had to look into such a plan less upgrade of a .net application from Windows 7 to Windows 8 and below is the error which I got when browsing WCF services hosted in IIS8 . The upgrade was done first in QA environment ie they simply installed the MSIs in Windows 8 environment and the dev team is informed when error happened.
HTTP Error 500.19 - Internal Server Error
The requested page cannot be accessed because the
related configuration data for the page is invalid.
Detailed Error Information:
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:\Program Files
(x86)\...\web.config
|
Requested URL
|
http://localhost:80/.../dataservice.svc
|
Physical Path
|
C:\Program
Files (x86)\...\dataservice.svc
|
Logon Method
|
Not
yet determined
|
Logon User
|
Not
yet determined
|
Config Source:
835: <validation
validateIntegratedModeConfiguration="false" />
836: <handlers>
837: <add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
836: <handlers>
837: <add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
More Information:
This error occurs
when there is a problem reading the configuration file for the Web server or
Web application. In some cases, the event logs may contain more information
about what caused this error.
Normally this application is installed in pre configured OS images as it requires so many prerequisites. In this case the image for Windows 8 was not created which means all the prerequisites and settings needs to be done manually.
Resolution
This specific error routes to the locked HttpHandlers. To get more idea about locking features we should know about IIS feature delegation. We need to go IIS8 manager and point the sever node and select feature delegation.There we could see that the http handerls are locked. Allowing edit option will solve this issue.
It didn't actually solved our issue instead it showed subsequent issue. In that Win 8machine ASP.Net and WCF was not registered with IIS 8 :-(
No comments:
Post a Comment