I was shopping some MP3 players online when I got this servlet exception.
The ".do" at the end of the url tells us the mighty online shopping site of American giant retailer runs on "struts" framework.
further the words "tiles" tells us it uses "Tiles framework" in struts.
This is the exception in detail:
[ServletException in:/include/dynamic/tiles/modules/item/shippingAvailabilityInformation.jsp] An error occurred while evaluating custom action attribute "value" with value "_1_": _2_ (_3_)'