This happens in multiplayer,when i try to tame a horse,the server will crash and the server console will say nullpointerexeption and when you restart the server and you join it it will say nullpointerexeption (but no crash on client) and will only work it you set in the server properties file spawn_animals:false.
Duplicate of MC-13628, please use the search function to see if your bug has already been submitted. Currently over 55% of tickets are being closed as duplicate.