This happened to me this winter at the peak of the winter run, and I was bummed, I was ready to toss the rod. The tip snapped right off two inches from the end. Fortunately, I did what Osmosis said to do above, I carefuly cut back the broken remnants to make it smooth, and used the original tip with the glue stuff and a lighter. My rod's now a "custom" 8'4" instead of 8'6" but it works, and it wasn't a total loss like I thought. I was concerned about the strength, but I hooked into a couple steelhead and a 'nook so it's solid.
quick cheap fix. 2 bucks for the glue.