NPE on saving out the world on shutdown of server.

[ProsperCraft]

https://gist.github.com/ProsperCraft/0caf60266456f2652b7a7a9ef5000cf1

forge-1.12.2-14.23.1.2598-universal.jar
ElecCore-1.12.2-1.8.434.jar

[Elec332]

Do you have the entire server log?

[ProsperCraft]

ProsperServerLogs.zip

[ProsperCraft]

This is still happening.

Console- https://gist.github.com/ProsperCraft/b9757a617523a3f3b20be957e091e025

2018-02-05-2.log.gz

[ayan4m1]

My environment:

CentOS 7 x64
Oracle JDK x64 1.8.0_181
Minecraft 1.12.2
FTB Revelation 2.3.0

The Revelation modpack is using ElecCore-1.12.2-1.8.434.jar

I have had the same problem. It is intermittent. When a player disconnects from a dedicated server instance, the server crashes with:

[02:00:01] [Server Shutdown Thread/ERROR] [FML]: Exception caught during firing event net.minecraftforge.fml.common.gameevent.PlayerEvent$PlayerLoggedOutEvent@2586c5ba:
java.lang.NullPointerException: null
        at elec332.core.server.ServerHelper$EventHandler.onPlayerDisconnected(ServerHelper.java:420) ~[ServerHelper$EventHandler.class:?]
        at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_992_EventHandler_onPlayerDisconnected_PlayerLoggedOutEvent.invoke(.dynamic) ~[?:?]
        at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) ~[ASMEventHandler.class:?]
        at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182) [EventBus.class:?]
        at net.minecraftforge.fml.common.FMLCommonHandler.firePlayerLoggedOut(FMLCommonHandler.java:579) [FMLCommonHandler.class:?]
        at net.minecraft.server.management.PlayerList.func_72367_e(PlayerList.java:387) [pl.class:?]
        at net.minecraft.network.NetHandlerPlayServer.func_147231_a(NetHandlerPlayServer.java:849) [pa.class:?]
        at net.minecraft.network.NetworkManager.func_179293_l(NetworkManager.java:453) [gw.class:?]
        at net.minecraft.network.NetHandlerPlayServer$2.run(NetHandlerPlayServer.java:291) [pa$2.class:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_181]
        at net.minecraft.server.MinecraftServer.func_175586_a(MinecraftServer.java:1383) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.func_152344_a(MinecraftServer.java:1395) [MinecraftServer.class:?]
        at net.minecraft.network.NetHandlerPlayServer.func_194028_b(NetHandlerPlayServer.java:287) [pa.class:?]
        at net.minecraft.server.management.PlayerList.func_72392_r(PlayerList.java:1083) [pl.class:?]
        at net.minecraft.server.MinecraftServer.func_71260_j(MinecraftServer.java:431) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer$4.run(MinecraftServer.java:1579) [MinecraftServer$4.class:?]

EDIT: In my case, this was a side-effect from auto-restarting the server.

Here is the full debug.log for you - debug-1.log