This null pointer exception resulted in a sporadic server crash.
Environment
Minecraft Version: 1.8.1
Operating System: Linux (amd64) version 3.2.0-4-amd64
Java Version: 1.7.0_65, Oracle Corporation
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 2792247216 bytes (2662 MB) / 4277534720 bytes (4079 MB) up to 4277534720 bytes (4079 MB)
Dupe of MC-73866 / MC-74963