[Bug v1.43] Quantim Armor Crash client/server

clantrebor · Dec 26th 2011

Seems to be random. Doesn't happen for hours or minutes. Can't figure out how to duplicate.

Code

java.lang.NullPointerException
    	at dk.a(SourceFile:181)
    	at ic2.common.ItemArmorQuantumSuit.performQuantum(ItemArmorQuantumSuit.j
ava:46)
    	at mod_IC2.OnTickInGame(mod_IC2.java:1537)
    	at ic2.platform.Ic2.OnTickInGame(Ic2.java:434)
    	at ModLoader.OnTick(ModLoader.java:1119)
    	at EntityRendererProxy.b(EntityRendererProxy.java:16)
    	at net.minecraft.client.Minecraft.x(SourceFile:738)
    	at net.minecraft.client.Minecraft.run(SourceFile:658)
    	at java.lang.Thread.run(Unknown Source)
Stopping!
java.net.SocketTimeoutException: Read timed out
    	at java.net.SocketInputStream.socketRead0(Native Method)
    	at java.net.SocketInputStream.read(Unknown Source)
    	at java.net.SocketInputStream.read(Unknown Source)
    	at java.net.SocketInputStream.read(Unknown Source)
    	at java.io.FilterInputStream.read(Unknown Source)
    	at gt.a(SourceFile:136)
    	at hc.e(SourceFile:190)
    	at hc.c(SourceFile:10)
    	at pa.run(SourceFile:77)

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Cadde · Dec 26th 2011

Tell us more... What mods are you using? How did you install them? Are you using bukkit?

Obviously it's a random NPE happening but without knowing the environment we could spend a billion years looking for the cause.

EDIT: The NPE is caused by a player becoming null while the game is iterating all players. Not thread safe code, rare error and i would assume it is really caused by something completely different.

sniperfield · Dec 27th 2011

There's a similar bug on my server.
Crashed the server already several times -.-

Code

java.lang.NullPointerException
at net.minecraft.server.ItemStack.damage(ItemStack.java:172)
at ic2.common.ItemArmorQuantumSuit.performQuantum(ItemArmorQuantumSuit.java:39)
at net.minecraft.server.mod_IC2.OnTickInGame(mod_IC2.java:1573)
at ic2.platform.Ic2.OnTickInGame(Ic2.java:36)
at net.minecraft.server.ModLoader.OnTick(ModLoader.java:682)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:407)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)




Unexpected exception
java.lang.NullPointerException
at net.minecraft.server.ItemStack.damage(ItemStack.java:172)
at ic2.common.ItemArmorQuantumSuit.performQuantum(ItemArmorQuantumSuit.java:39)
at net.minecraft.server.mod_IC2.OnTickInGame(mod_IC2.java:1573)
at ic2.platform.Ic2.OnTickInGame(Ic2.java:36)
at net.minecraft.server.ModLoader.OnTick(ModLoader.java:682)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:407)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)

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MJEvans · Dec 27th 2011

Might this happen /right/ after someone logs off/is disconnected if there's a race condition?

clantrebor · Dec 28th 2011

Here is the entire log file. It's happened when I'm alone on the server and when someone else is on. It's also crashed the server with the same conditions. We're tried replicating it and found nothing. Also it hasn't happened in days now.

Code

C:\Users\Josh\Desktop>"C:\Program Files\Java\jre7\bin\java.exe" -Xmx2g -Xms2g -c
p Minecraft -jar "Minecraft.jar"
27 achievements
174 recipes
Setting user: clantrebor, 888427433798381940
ModLoader 1.0.0 Initializing...
Mod Initialized: mod_ModLoaderMp 1.0.0
Mod Initialized: mod_ReiMinimap v2.9 [1.0.0]
Mod Initialized: mod_TooManyItems 1.0.0 2011-11-29
Mod Initialized: mod_BuildCraftCore 2.2.10
Mod Initialized: mod_BuildCraftBuilders 2.2.10
Mod Initialized: mod_BuildCraftEnergy 2.2.10
Mod Initialized: mod_BuildCraftFactory 2.2.10
Mod Initialized: mod_BuildCraftTransport 2.2.10
Mod Initialized: mod_IC2 v1.43
Mod Initialized: mod_IC2AdvancedMachines v3.0
Mod Initialized: mod_PowerConverters 1.0.0R1.3.0
Mod Initialized: mod_RedPowerArray 2.0pr4b
Mod Initialized: mod_RedPowerCore 2.0pr4b
Mod Initialized: mod_RedPowerLighting 2.0pr4b
Mod Initialized: mod_RedPowerLogic 2.0pr4b
Mod Initialized: mod_RedPowerMachine 2.0pr4b
Mod Initialized: mod_RedPowerWiring 2.0pr4b
Mod Initialized: mod_RedPowerWorld 2.0pr4b
Mod Loaded: mod_ModLoaderMp 1.0.0
Mod Loaded: mod_ReiMinimap v2.9 [1.0.0]
Mod Loaded: mod_TooManyItems 1.0.0 2011-11-29
Mod Loaded: mod_BuildCraftCore 2.2.10
Mod Loaded: mod_BuildCraftBuilders 2.2.10
Mod Loaded: mod_BuildCraftEnergy 2.2.10
Mod Loaded: mod_BuildCraftFactory 2.2.10
Mod Loaded: mod_BuildCraftTransport 2.2.10
Using 32 audio sources.
MinecraftForge V1.2.3 Initialized
ModLoaderMP 1.0.0 Initialized
Mod Loaded: mod_IC2 v1.43
Mod Loaded: mod_IC2AdvancedMachines v3.0
Mod Loaded: mod_PowerConverters 1.0.0R1.3.0
Mod Loaded: mod_RedPowerArray 2.0pr4b
Mod Loaded: mod_RedPowerCore 2.0pr4b
Mod Loaded: mod_RedPowerLighting 2.0pr4b
Mod Loaded: mod_RedPowerLogic 2.0pr4b
Mod Loaded: mod_RedPowerMachine 2.0pr4b
Mod Loaded: mod_RedPowerWiring 2.0pr4b
Mod Loaded: mod_RedPowerWorld 2.0pr4b
Starting BuildCraft 2.2.10
Copyright (c) SpaceToad, 2011
http://www.mod-buildcraft.com
Done.
WARNING: Found unknown Windows version: Windows 7
Attempting to use default windows plug-in.
Loading: net.java.games.input.DirectAndRawInputEnvironmentPlugin
Connecting to 76.14.170.203, 25565
[Rei's Minimap] MCPatcher HD Fix: Not found
java.lang.NullPointerException
at dk.a(SourceFile:181)
at ic2.common.ItemArmorQuantumSuit.performQuantum(ItemArmorQuantumSuit.j
ava:46)
at mod_IC2.OnTickInGame(mod_IC2.java:1537)
at ic2.platform.Ic2.OnTickInGame(Ic2.java:434)
at ModLoader.OnTick(ModLoader.java:1119)
at EntityRendererProxy.b(EntityRendererProxy.java:16)
at net.minecraft.client.Minecraft.x(SourceFile:738)
at net.minecraft.client.Minecraft.run(SourceFile:658)
at java.lang.Thread.run(Unknown Source)
Stopping!
java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.io.FilterInputStream.read(Unknown Source)
at gt.a(SourceFile:136)
at hc.e(SourceFile:190)
at hc.c(SourceFile:10)
at pa.run(SourceFile:77)

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Monoxide · Dec 28th 2011

This has also happened to me several times while alone on my server (the one time I remember explicitly what I was doing, I was just killing mobs with a chainsaw while wearing the helmet/legs/boots)

Quantax · Dec 30th 2011

I got the same error.

Code

2011-12-30 01:23:58 [SEVERE] Unexpected exception
java.lang.NullPointerException
    	at jb.a(SourceFile:181)
    	at ic2.common.ItemArmorQuantumSuit.performQuantum(ItemArmorQuantumSuit.java:46)
    	at mod_IC2.OnTickInGame(mod_IC2.java:1537)
    	at ic2.platform.Ic2.OnTickInGame(Ic2.java:41)
    	at ModLoader.OnTick(ModLoader.java:772)
    	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:329)
    	at cu.run(SourceFile:457)

I am using IC2 1.43, BC 2.2.11, RedPower PR4b, Minefactory Reloaded and Power Converters. Forge version is 1.2.3.

SpeedDaemon · Jan 5th 2012

I've been able to repeat this now... q-suit helmet running dry == crashed server

Code

2012-01-05 14:42:52 [SEVERE] Unexpected exception
java.lang.NullPointerException
    	at jb.a(SourceFile:181)
    	at ic2.common.ItemArmorQuantumSuit.performQuantum(ItemArmorQuantumSuit.java:46)
    	at mod_IC2.OnTickInGame(mod_IC2.java:1537)
    	at ic2.platform.Ic2.OnTickInGame(Ic2.java:41)
    	at ModLoader.OnTick(ModLoader.java:772)
    	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:329)
    	at cu.run(SourceFile:457)

highsteve · Jan 9th 2012

I have it too on my server.

Quote

21:41:32 [SEVERE] java.lang.NullPointerException
21:41:32 [SEVERE] at net.minecraft.server.ItemStack.damage(ItemStack.java:172)
21:41:32 [SEVERE] at ic2.common.ItemArmorQuantumSuit.performQuantum(ItemArmorQuantumSuit.java:46)
21:41:32 [SEVERE] at net.minecraft.server.mod_IC2.OnTickInGame(mod_IC2.java:1834)
21:41:32 [SEVERE] at ic2.platform.Ic2.OnTickInGame(Ic2.java:41)
21:41:32 [SEVERE] at net.minecraft.server.ModLoader.OnTick(ModLoader.java:682)
21:41:32 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:407)
21:41:32 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)
21:41:32 [SEVERE] Unexpected exception
java.lang.NullPointerException
at net.minecraft.server.ItemStack.damage(ItemStack.java:172)
at ic2.common.ItemArmorQuantumSuit.performQuantum(ItemArmorQuantumSuit.java:46)
at net.minecraft.server.mod_IC2.OnTickInGame(mod_IC2.java:1834)
at ic2.platform.Ic2.OnTickInGame(Ic2.java:41)
at net.minecraft.server.ModLoader.OnTick(ModLoader.java:682)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:407)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)

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Alblaka · Jan 9th 2012

Found the issue, amusing error.
The Helmet was damaged in multiple steps, with a NPE-test only being before the first one... if any of thefirst few steps destroyed the armor, the following up would create a NPE.

Fixed.

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