http://blogs.msdn.com/webtopics/archive/2009/06/19/intermittently-system-web-httpexceptions-a-field-or-property-with-the-name-columnname-was-not-found-on-the-selected-data-source-is-thrown-when-the-application-is-under-heavy-load.aspxWorking on another interesting case where we were occasionally failing with HttpException and after hitting refresh on the browser we were back in business.Next stop was to look at event viewer where bunch of unhandled exceptions like below were reported:en-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/webtopics/archive/2009/06/19/intermittently-system-web-httpexceptions-a-field-or-property-with-the-name-columnname-was-not-found-on-the-selected-data-source-is-thrown-when-the-application-is-under-heavy-load.aspx#9863445Mon, 10 Aug 2009 21:41:39 GMT91d46819-8472-40ad-a661-2c78acb4018c:9863445TrackBackhttp://blogs.msdn.com/webtopics/archive/2009/06/19/intermittently-system-web-httpexceptions-a-field-or-property-with-the-name-columnname-was-not-found-on-the-selected-data-source-is-thrown-when-the-application-is-under-heavy-load.aspx#9867309Thu, 13 Aug 2009 01:43:11 GMT91d46819-8472-40ad-a661-2c78acb4018c:9867309TrackBack