Hot answers tagged fast-search
1
Fast Search (2010) will index javascript sites.
SharePoint Search (2013) will not index javascript.
References: http://social.msdn.microsoft.com/Forums/de-DE/sharepointsearch/thread/b2456e71-9308-43f8-8351-b013b5070cc5
http://blogs.technet.com/b/vedant/archive/2010/08/24/fast-search-server-2010-for-sharepoint-specific-indexing-connectors.aspx
1
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 ...
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