Internal 500 error after installing RS Add-in on multiple WFE Sharepoint environment

Question

I'm trying to install SSRS SQL Server 2012 SP1 with
SharePoint integrated mode on a SharePoint 2013farm with 4 WFE and a dedicated
app server. I have cloned our production system and have been able to make
everything run twice but after multiple installs. I have tried to note down the
errors and after checking them off my (mostly permissions, one content DB was
read-only), I am able to run the installers (Reporting Services - SharePoint on
the app server and Reporting Services Add-in on the web frontends) without
errors.
Unfortunately, although there are no errors on the logs and even
if I can access Central Administration on the app server and configure the
Reporting Services service, the RS Add-in messes up the web.config file of our
web application and I get an internal 500 error on the client browser. When
logging IIS, the error is 500.19 which looks to be an invalid web.config file.
So to test this, I try replacing the web.config file before the install (with no
references to Reporting Services) and the site loads. Uninstalling the RS Add-in
also fixes the site but even after trying to reinstall it (either with the SQL
Server 2012 SP1 installer media or the rsSharepoint.msi file), the site won't
work again.
Any ideas on how to fix this? Thank you in advance.

Answer 1

Hi,
Use “Get-SPServiceApplicationPool | Select Id,Name” to find the GUID of the SQL Server Reporting Services Service Application pool.
Then, check service application settings in IIS. Click on GUID created for RS and check the physical path C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\WebServices\Reporting. Make sure that you are able to find the path in your
file system.
If not, the Shared Feature(Reporting Service- SharePoint) may not install properly. Try reinstalling shared feature (reporting service – SharePoint) and reporting services add in.
Also, check RS Logs in the Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\WebServices\LogFiles and ULS Logs in the Program Files\Common Files\Microsoft Shared\web server extensions\15\LOGS.
Thanks.
Tracy Cai
TechNet Community Support