I am using the Telerik Reporting with HTML 5 Viewer Q2 2015. With specific report it needs high processing i increased the timeout of the sql data source command to 600 seconds (10 minutes).
When rendering the report in the HTML 5 Viewer i receive the following error :
Internal Server Error
Timeout expired. The timeout period elapsed
prior to completion of the operation or the server is not responding.
This failure occurred while attempting to connect to the routing
destination. The duration spent while attempting to connect to the
original server was - [Pre-Login] initialization=112; handshake=27;
[Login] initialization=0; authentication=0; [Post-Login] complete=1;
The wait operation timed out
This error occurs just 40 seconds after pressing the preview button
On the FREB log i see that the timeout occurs on the ReportController GetDocumentInfo method.