Oh, this is on Bitcoin. I was looking on my Litecoin node. I see the error now.

Taking a brief glance at the code (node.py:53 and p2p.py:71), it looks like the "in handle_share_hashes: ... twisted.internet.defer.TimeoutError"  error happens when a peer takes longer than 15 seconds to reply to a request for a share and its parents. This will happen e.g. when one of your peers is saturating its CPU at 100% on one core. It does not mean there's a problem on your node. It just means that someone else has a problem.