Hi Rajat,
When you are ready to re-deploy the upgrade, keep an eye on the BCM_Reporting_Services_Component_Install.txt file and the "ReportServerService__*.log" file found at "MSRS10_50.XXX\Reporting Services\LogFiles". Where XXX is your engine directory.
Check for errors in see if you get any hits on where the installation could be halting.
In the "ReportServerService__*.log" check for errors like :
"ui!ReportManager_0-6!2bb4!09/04/2015-20:12:58:: Unhandled exception: Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerHttpRuntimeClientDisconnectionException: A client has disconnected from the Report Server Web service application domain ReportManager_ACME_0-6-130858669636135785. No corrective action is required. An error code has been submitted to ASP.NET to release the connection. The error code is 800708CA. ---> System.Runtime.InteropServices.COMException: This network connection does not exist. (Exception from HRESULT: 0x800708CA)"
If you see entries like:
"appdomainmanager!ReportServer_0-8!2bb4!09/04/2015-20:11:23:: i INFO: RS authentication mode is 4; effective ASP.NET authentication mode is Windows. vdir=/ReportServer_ACME."
-> this means you are getting pass the authentication to the reporting services...
And..
"library!ReportServer_0-8!33c4!09/04/2015-20:12:33:: Call to GetPropertiesAction(/ContactCenter Reporting/Outbound/AgentCalls 1 - Annual, PathBased)." -> Means the actual volumes are being installed...
- Lloyd