net.minecraft.server.v1_6_R3.ExceptionWorldConflic t: Failed to check session lock, aborting
>14:45:37 [SEVERE] net.minecraft.server.v1_6_R3.ExceptionWorldConflic t: Failed to check session lock, aborting
>14:45:37 [SEVERE] net.minecraft.server.v1_6_R3.ExceptionWorldConflic t: Failed to check session lock, aborting