Large Reports - Error: The Underlying Connection Was Closed: An Unexpected Error Occurred On A Receive.

First off I understand that it is a horrible idea to run extremely large/long running reports, but sometimes it ends up being the best possible solution due to external forces.




I've got a 25,000 page report that we recently converted from crystal reports to SSRS. The SSRS server is a 64bit 2003 server with 32 gigs of ram running SSRS 2005. When running the report through the report manager web application, it renders in the browser/viewer after about 12 minutes. Exporting to pdf through the browser/viewer in the report manager takes an additional 55 minutes. It does work and it produces a whopping 1.03gb pdf.




Unfortunately, I've run into a problem when trying to do this from a console application using the SSRS client API. After about 30-35 minutes I get an exception on the client with the following error:
Exception Message: The underlying connection was closed: An unexpected error occurred on a receive.
InnerException = Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.

Here is the api call:




Code Snippet

byte[] m_data = reportingService.Render(this.ReportPath, this.ExportFormat, null,
deviceInfo, selectedParameters, null, null, out encoding, out m_mimeType,

out usedParameters, out warnings, out streamIds);
Here are some things I've tried so far:


set the HttpRuntime ExecutionTimeout value to 3 hours on the report server
disabled http keep alives on the report server
increased the script timeout on the report server
set the report to never time out on the server
set the report timeout to several hours on the client call
Disabled antivirus on the client side, and verified there was no antivirus running on the reporting server.
Tried using default credentials in the ReportingService object as opposed to supplying credentailsAny ideas would be appreciated. I understand the best solution is to split the report up into smaller reports, which is the backup option, but being able to keep it as one report is the goal.