SPLongOperation throws error "Thread was being aborted"

Question

Recently we have migrated our SharePoint application from 2010 to 2013, we have upgraded our solution from VS 2012 to VS 2013 and deployed it successfully in newly installed SharePoint 2013 prior to content DB migrate and all.
In our solution, we had requirement to implement lengthy operation which create site from site template, copying documents from one library to another, creating user groups and so on. To achieve these, we have used
SPLongOperation which is taking care for not to abort thread and complete operation without and time constraint, which is working fine 2010 environment. 
After upgrading to 2013, we started facing problem with "Thread was being aborted", which seems SPLongOperation is not working.
Have I missed any configuration?
Help appreciated.
Arpan Shah MSFT Mark as Answer if it solves your problem. Vote As Helpful if the post is helpful for you.

Answer 1

Hi,
 According to your description, I suggest you debug your code in the test
environment and check if the method of SPLongOperation.End throw the exception.
The code snippet below for your reference:
//Long Operation Code
using (SPLongOperation longOperation = new SPLongOperation(this.Page))
//Start the long operation
longOperation.Begin();
//Your Long Operation Code Goes Here...
//End the long operation
longOperation.End("http://localhost/_layouts/success.aspx", Microsoft.SharePoint.Utilities.SPRedirectFlags.DoNotEndResponse, HttpContext.Current, "");
More information:
http://snahta.blogspot.com/2009/10/splongoperation-class.html
Thanks,
Dennis Guo
TechNet Community Support
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Dennis Guo
TechNet Community Support