Feed importer issue

I have a feed url that I'm trying to import from but it always fail and the green import status bar would be stuck at the initial position. When I tried to inspect the request, the response seems to come back with the number '5'.

When I dived into the code and traced through the calls the code seems to stop at line 143 of /helpers/connectors.php. It seems the code is setting a hard stop when $cur_loops == 5 and echoing out '5' and then exits. When I commented out this if loop the feed would import the articles successfully.

My question is, is this number '5' an arbitrary number and why was it set? The feed url I'm using is this: http://feeds.feedburner.com/abajournal/dailynews?format=xml

Thanks