I’ve recently been battling long running reports and how to make certain they do not timeout on the SharePoint servers.
There are several levels in SharePoint 2010 that a report can time out. I will discuss the top three that I have encountered and what I had to do to fix them.
The first one, and the easiest to fix, is within the SSRS report that is housed on your SharePoint site. This fixed about 75% of my problem with time-out issues.
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