Hot answers tagged fast-search
As you have seen, the limit for the Query is actually 2048 characters. So any more than that will throw this exception. http://stackoverflow.com/questions/8061330/how-to-overcome-fast-search-char-limitation-2048 is a possible duplicate of your question, but sadly it never recieved any attention. Also this from Technet ...
Only top voted, non community-wiki answers of a minimum length are eligible