Bug

Is this client or server modded?

Please force crash report when in server by holding f3 + c 10 seconds.
Also, you have 32-bit computer and java, it can cause issues.

Either duplicate of MC-17684 (if using a texture pack), otherwise duplicate of MC-18752.
Either way: Please use the search function to see if your bug has already been submitted. Currently over 58% of tickets are being closed as duplicate.