[INFO] Done (2.685s)! For help, type "help" or "?"
u: Ticking tile entity
        at net.minecraft.server.MinecraftServer.t(SourceFile:474)
        at io.t(SourceFile:262)
        at net.minecraft.server.MinecraftServer.s(SourceFile:405)
        at net.minecraft.server.MinecraftServer.run(SourceFile:339)
        at he.run(SourceFile:582)
Caused by: java.lang.NullPointerException
        at arp.l(SourceFile:106)
        at arp.h(SourceFile:63)
        at abq.h(SourceFile:1268)
        at jo.h(SourceFile:364)
        at net.minecraft.server.MinecraftServer.t(SourceFile:470)
        ... 4 more
2013-06-27 21:38:15 [SEVERE] Encountered an unexpected exception u
u: Ticking tile entity
        at net.minecraft.server.MinecraftServer.t(SourceFile:474)
        at io.t(SourceFile:262)
        at net.minecraft.server.MinecraftServer.s(SourceFile:405)
        at net.minecraft.server.MinecraftServer.run(SourceFile:339)
        at he.run(SourceFile:582)
Caused by: java.lang.NullPointerException
        at arp.l(SourceFile:106)
        at arp.h(SourceFile:63)
        at abq.h(SourceFile:1268)
        at jo.h(SourceFile:364)
        at net.minecraft.server.MinecraftServer.t(SourceFile:470)
        ... 4 more