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A surprising crash

Posted December 14, 201410 yr

Crash Log

java.lang.ClassCastException: net.minecraft.client.entity.EntityClientPlayerMP cannot be cast to net.minecraft.entity.player.EntityPlayerMP
at zeldaswordskills.entity.ZSSPlayerInfo.loadProxyData(ZSSPlayerInfo.java:355)
at zeldaswordskills.handler.ZSSEntityEvents.onEntityJoinWorld(ZSSEntityEvents.java:178)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_187_ZSSEntityEvents_onEntityJoinWorld_EntityJoinWorldEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:138)
at net.minecraft.world.World.func_72838_d(World.java:1334)
at net.minecraft.client.multiplayer.WorldClient.func_72838_d(WorldClient.java:159)
at net.minecraft.client.Minecraft.func_71353_a(Minecraft.java:2220)
at net.minecraft.client.Minecraft.func_71403_a(Minecraft.java:2135)
at net.minecraft.client.network.NetHandlerPlayClient.func_147282_a(NetHandlerPlayClient.java:239)
at com.mumfrey.liteloader.client.PacketEventsClient.handlePacket(PacketEventsClient.java:106)
at com.mumfrey.liteloader.core.PacketEvents.handlePacketEvent(PacketEvents.java:179)
at com.mumfrey.liteloader.core.PacketEvents.handlePacket(PacketEvents.java:134)
at com.mumfrey.liteloader.core.PacketEvents.handlePacket(PacketEvents.java:129)
at com.mumfrey.liteloader.core.event.EventProxy.$event00032(EventProxy.java:261)
at net.minecraft.network.play.server.S01PacketJoinGame.func_148833_a(SourceFile)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:2050)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:962)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:887)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at zeldaswordskills.entity.ZSSPlayerInfo.loadProxyData(ZSSPlayerInfo.java:355)
at zeldaswordskills.handler.ZSSEntityEvents.onEntityJoinWorld(ZSSEntityEvents.java:178)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_187_ZSSEntityEvents_onEntityJoinWorld_EntityJoinWorldEvent.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:138)
at net.minecraft.world.World.func_72838_d(World.java:1334)
at net.minecraft.client.multiplayer.WorldClient.func_72838_d(WorldClient.java:159)
at net.minecraft.client.Minecraft.func_71353_a(Minecraft.java:2220)
at net.minecraft.client.Minecraft.func_71403_a(Minecraft.java:2135)
at net.minecraft.client.network.NetHandlerPlayClient.func_147282_a(NetHandlerPlayClient.java:239)
at com.mumfrey.liteloader.client.PacketEventsClient.handlePacket(PacketEventsClient.java:106)
at com.mumfrey.liteloader.core.PacketEvents.handlePacketEvent(PacketEvents.java:179)
at com.mumfrey.liteloader.core.PacketEvents.handlePacket(PacketEvents.java:134)
at com.mumfrey.liteloader.core.PacketEvents.handlePacket(PacketEvents.java:129)
at com.mumfrey.liteloader.core.event.EventProxy.$event00032(EventProxy.java:261)
at net.minecraft.network.play.server.S01PacketJoinGame.func_148833_a(SourceFile)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)

This is the old code involved in this particular crash.

// this has since been updated to use PlayerEvent.Clone instead of the clunky proxy method
public static final void loadProxyData(EntityPlayer player) {
ZSSPlayerInfo info = ZSSPlayerInfo.get(player);
NBTTagCompound tag = CommonProxy.getEntityData(getSaveKey(player));
if (tag != null) { info.loadNBTData(tag); }
info.playerSkills.validateSkills();

// This line crashing:
PacketDispatcher.sendTo(new SyncPlayerInfoPacket(info), (EntityPlayerMP) player);
}

// event handler
@SubscribeEvent
public void onEntityJoinWorld(EntityJoinWorldEvent event) {
if (!event.entity.worldObj.isRemote) {
if (event.entity instanceof EntityPlayer) {
ZSSPlayerInfo.loadProxyData((EntityPlayer) event.entity);
}
}
}

So of course it's obvious I can check for instanceof EntityPlayerMP before sending the packets, case closed, but the bit I don't understand is I have always worked under the impression that checking if world is not remote implies that EntityPlayer IS an instance of EntityPlayerMP, and that assumption has never before been challenged.

Interesting point number two, this crash evidently only happens when Treecapitator is loading alongside, and judging by the various 'com.mumfrey.liteloader' lines in the crashlog, it seems reasonable to me that perhaps mumfrey's liteloader is partly or wholly responsible - either that, or I have completely misunderstood a lot more than I imagined (always a possibility ).

My question, then, is how could I possibly have an instance of EntityClientPlayerMP when the world is not remote?

http://i.imgur.com/NdrFdld.png[/img]

Quote

December 16, 201410 yr

try to change your import for the EntityPlayerMP from net.minecraft.entity.player.EntityPlayerMP to net.minecraft.client.entity.EntityClientPlayerMP

Quote

December 16, 201410 yr

try to change your import for the EntityPlayerMP from net.minecraft.entity.player.EntityPlayerMP to net.minecraft.client.entity.EntityClientPlayerMP

what?

@coolAlias

I can't explain this behavior either. Did you try to reproduce this crash with only LiteLoader?

Either way, I doubt it's a Forge issue, unless you can reproduce this with only Forge.

But when casting something to a subclass, always assume the class is something different, so always check if it's the class you want to cast to before the actual casting.

Don't ask for support per PM! They'll get ignored! | If a post helped you, click the "Thank You" button at the top right corner of said post! |

mah twitter

This thread makes me sad because people just post copy-paste-ready code when it's obvious that the OP has little to no programming experience. This is not how learning works.

Quote

December 16, 201410 yr

Author

@SanAndreasP Yes, that's what I've done. I suspect that liteloader is doing something fishy, but I haven't downloaded it yet to try it myself. My mod has had almost an entire year with that particular code in place and this is the first crash report I've received that has just totally perplexed me as to the cause, since it seems to be completely unrelated to what my mod is doing (though it must be, I suppose).

Anyway, I've solved the immediate issue by changing my instanceof checks to EntityPlayerMP instead of just EntityPlayer, though I am still curious as to how that became necessary in this case.

http://i.imgur.com/NdrFdld.png[/img]

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By TileEntity · Posted 17 minutes ago17 min
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That fixed it! it's still being weird and not actually printing anything to CMD but the logs look fine and eventually the gui generated looking normal. Thanks for your help I've done that on linux before but windows servers have always just worked with one click for some reason for me

By Linksapprentice · 3 hours ago3 hr
Trying to boot MC Eternal 2 Server, works on linux not on Windows 11: Jvm args error

Make sure you are using Java 17 JDK

In the start script, replace the word "java" with the java 17 path (javaw.exe) and put it into quotation marks

By TileEntity · 6 hours ago6 hr
NEED HELP ASAP - Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla

There are client-side-only mods in your server - start with removing justenoughbreeding

By TileEntity · 6 hours ago6 hr
NEED HELP ASAP - Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla

Hey there, I have a big modpack I'm trying to run that I've put together with two other rather large communities- we have a grand opening scheduled for next week so it's really important that this gets solved ASAP.

The game runs fine in singleplayer, but when trying to run as a server using a hosting website, I've run into quite a massive error log. I've whittled it down to this point- I'm currently not sure what to do, as I believe the main error is relating to the datapack message, but I don't know for sure. Removing the datapack folder doesn't change the message either.

https://mclo.gs/2aTdXII

If the fix is something very simple, I apologize. I'm not too experienced with hosting websites and running large modpacks like this on a server.
I'm also not completely sure of which mods are client-only- a large handful of which are already disabled but I could be missing some. I just don't know which ones they would be, if that's causing the issue.

By nyxxiea · Posted 11 hours ago11 hr

TileEntity

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A surprising crash

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Trying to boot MC Eternal 2 Server, works on linux not on Windows 11: Jvm args error

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NEED HELP ASAP - Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla

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