Fatal NullPointer Exception in CB: 1493

I have been getting this NPE the entire time I've used any build of CraftBukkit that is for 1.0.0. I never received these before that.

CB: 1493

Plugins: IPGet, VanishNoPickup, Xray Detection, PermissionsEx, xAuth, iConomy, OKB3, KiwiAdmin, xWarp, Minequery, MobDisguise, Permissions, FalseBookExtra, FalseBookCart, CommandBook, FalseBookCore, LWC-Economy, ModTRS, WorldGuard, NoCheat, FalseBookBlock, WorldEdit, HeroChat, FirstLastSeen, FalseBookIC, Votifier, BukkitCompat, dynmap, MobBounty, WorldBorder, SimpleRegionMarket, LWC, PreciousStones, Register, EasyBan, ChestShop

Code:

2011-11-23 17:36:37 [SEVERE] java.lang.NullPointerException
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.InventoryPlayer.b(InventoryPlayer.java:315)
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.EntityHuman.b(EntityHuman.java:476)
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:219)
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:81)
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.EntityPlayer.w_(EntityPlayer.java:132)
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.World.entityJoinedWorld(World.java:1251)
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:104)
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.World.playerJoinedWorld(World.java:1233)
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.World.tickEntities(World.java:1140)
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:507)
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414)
2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
2011-11-23 17:36:37 [SEVERE] Unexpected exception
java.lang.NullPointerException
    at net.minecraft.server.InventoryPlayer.b(InventoryPlayer.java:315)
    at net.minecraft.server.EntityHuman.b(EntityHuman.java:476)
    at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:219)
    at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:81)
    at net.minecraft.server.EntityPlayer.w_(EntityPlayer.java:132)
    at net.minecraft.server.World.entityJoinedWorld(World.java:1251)
    at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:104)
    at net.minecraft.server.World.playerJoinedWorld(World.java:1233)
    at net.minecraft.server.World.tickEntities(World.java:1140)
    at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:507)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)

Any ideas what could be causing it?

You can tell when the crash is going to happen. It begins to lag slightly and progresses to unplayable lag, then the error.

Even restarting the server doesn't fix the issue, only thing you can do is wait for it to crash and restart, on which it will restart lag free.

 

Now that I look at this a second time, it seems like it is a java problem with Minecraft. What version of CraftBukkit are you using currently?

 

He said "CB: 1493", which is a Minecraft 1.0 build.

 

Yeah. That's kind of the reason it's not considered stable yet..

 

The problem only seems to affect me and a few others. The majority of people use 1493 without problem.

 

Craftbukkit for 1.0.0 is not recommended for use and is unsupported. You'll need to wait for a recommended build of Craftbukkit to come out. If this error still persists then - ask for help again.

Try a few different development builds and see if you have the same problem. Before using any development builds backup your map and anything else in your minecraft folder that you wouldn't want to use. Development builds are unstable and may not work properly.

 

Such a generic answer. I was asking if anyone knew what might be causing it, maybe someone had the same error.

I'm assuming it's a plugin error since the majority of people running 1493 have no problems.

 

Errors can happen for all sorts of reasons.

I'll give you a detailed explanation then...

If you really want to find out if it is a plugin error then

• First disable all your plugins by renaming your plugins folder. Check if the error is still there.

Now, that error your getting

Code:

 java.lang.NullPointerException

The error is a NPE or NullPointerException. This usually happens because a variable is null and does not contain anything. This could happen in a plugin.

It then gives you StackTrace to tell you exactly where the error is coming from

Code:

 at net.minecraft.server.InventoryPlayer.b(InventoryPlayer.java:315) 2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.EntityHuman.b(EntityHuman.java:476) 2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:219) 2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.ItemInWorldManager.c(ItemInWorldManager.java:81) 2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.EntityPlayer.w_(EntityPlayer.java:132) 2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.World.entityJoinedWorld(World.java:1251) 2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:104) 2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.World.playerJoinedWorld(World.java:1233) 2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.World.tickEntities(World.java:1140) 2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:507) 2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414) 2011-11-23 17:36:37 [SEVERE]     at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)

It's something to do with the Player Inventory code, it looks like it's having trouble setting up the Player.dat file and writing Inventory contents to it. (2011-11-23 17:36:37 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.java:1233))

Let's stop guessing though, as to really find out I would need to look through the code. The StackTrace suggests to me that this has nothing to do with a Plugin. It is all to do with Craftbukkit itself.

This is why development builds are not recommended for use and are unsupported - which is why I gave you a generic answer. Try use other development builds as this may fix your problem. When a Recommended Build comes out, problems like this should be fixed.

|Shadrx

 

@Donny
I'd just like to leave this here:

Your error:
2011-11-23 17:36:37 [SEVERE] at net.minecraft.server.InventoryPlayer.b(InventoryPlayer.java:315)

Recent Changelog:

http://ci.bukkit.org/job/dev-CraftBukkit/1508/changes

Things are unstable like I said, and they will be fixed