(Vanilla Server + Cauldron) 0 Players online, 2ms tick time, 100% CPU usage?

[ajthemacboy]

Hello! I just started a custom modpack server, just for a few friends, separate from my main modded server. The specs aren't low-end or high-end, but the CPU usage is around 100% or more even when no one is online.

 

My other server doesn't have this problem, and the modpack contains mostly the same mods, and no really intensive ones.

 

The total tick time is under 2 ms, so there is almost no load.

 

I use Java 8 (not by choice, the mods required it), Linux (obviously), and Cauldron, but it also happens with vanilla Forge.

 

I have run JMX CPU profiling and samples with no clues. I also tested a pure vanilla 1.8 server and the load does not occur, CPU usage is 1.2% when idle.

 

Any suggestions, or am I missing something obvious?

 

And here is the server modlist:

 

 

1.7.10_AM2-1.4.0.008.jar

AdvancedSolarPanel-1.7.10-3.5.1.jar

AgriCraft-1.7.10-1.3.1.jar

AlchemyPlusPlus-1.7.10-1.2.0.89.jar

AnimationAPI-1.7.10-1.2.4.jar

antiqueatlas-4.2.7-1.7.10.jar

AOBD-2.8.1.jar

appliedenergistics2-rv2-stable-10.jar

archimedesshipsplus-1.7.10-1.7.12.jar

Aroma1997Core-1.7.10-1.0.2.14.jar

AromaBackup-1.7.10-0.0.0.5.jar

ATG-1.7.10-0.12.0.jar

Automagy-1.7.10-0.26.3.jar

bdlib-1.9.1.97-mc1.7.10.jar

BiblioCraft[v1.10.5][MC1.7.10].jar

BiblioWoods[biomesOPlenty][v1.9].jar

BiblioWoods[Forestry][v1.7].jar

BiblioWoods[Natura][v1.5].jar

BigReactors-0.4.3A.jar

BiomesOPlenty-1.7.10-2.1.0.1387-universal.jar

BloodMagic-1.7.10-1.3.3-11.jar

Botania r1.7-208.jar

buildcraft-7.0.19.jar

buildcraft-compat-7.0.8.jar

carpentersblocks

Carpenter's Blocks v3.3.6 - MC 1.7.10.jar

ChickenChunks-1.7.10-1.3.4.19-universal.jar

Chisel2-2.4.1.40.jar

CodeChickenCore-1.7.10-1.0.6.43-universal.jar

CoFHCore-[1.7.10]3.0.3-303.jar

CollectiveFramework-1.0.0-121.jar

compactmachines-1.7.10-1.20.jar

ComputerCraft1.74.jar

Decocraft-2.0.2_1.7.10.jar

denseores-1.6.2.jar

Draconic-Evolution-1.7.10-1.0.1c.jar

DragonAPI 1.7.10 V7f.jar

ElectriCraft 1.7.10 V7e.jar

EnderIO-1.7.10-2.2.8.381.jar

EnderStorage-1.7.10-1.4.7.33-universal.jar

EnderTech-1.7.10-0.3.2.388.jar

EnderZoo-1.7.10-1.0.13.30.jar

ExpandedRedstone 1.7.10 V7a.jar

ExtraCells-1.7.10-2.2.73b129.jar

ExtraTiC-1.7.10-1.4.5.jar

extrautilities-1.2.9.jar

FastLeafDecay-1.7.10-1.1.jar

Forbidden Magic-1.7.10-0.57.jar

funky-locomotion-1.7.10-beta-5c.jar

generators-0.9.17.102-mc1.7.10.jar

GraviSuite-1.7.10-2.0.3.jar

Guide-API-1.7.10-1.0.1-20.jar

Hats-4.0.1.jar

HatStand-4.0.0.jar

Headcrumbs-1.5.5.jar

IC2NuclearControl-2.2.5a-GoingForTheKill.jar

iChunUtil-4.2.2.jar

ImmersiveEngineering-0.5.1.jar

industrialcraft-2-2.2.759-experimental.jar

InfiniBows-1.7.10-universal-coremod-1.3.0.20.jar

INpureCore-[1.7.10]1.0.0B9-62.jar

inventorypets-1.7.10-1.3.2.jar

InventoryTweaks-1.59-dev-152.jar

ironchest-1.7.10-6.0.62.742-universal.jar

Jabba-1.2.1a_1.7.10.jar

LunatriusCore-1.7.10-1.1.2.21-universal.jar

magneticraft-0.3.4.jar

Mantle-1.7.10-0.3.2.jar

mcjtylib-1.2.0.jar

Mekanism-1.7.10-8.1.7.252.jar

MekanismGenerators-1.7.10-8.1.7.252.jar

MekanismTools-1.7.10-8.1.7.252.jar

Minechem-1.7.10-5.0.5.406.jar

MineFactoryReloaded-[1.7.10]2.8.0-104.jar

MobiusCore-1.2.5-KC.jar

Morpheus-1.7.10-1.6.9.jar

movingworld-1.7.10-1.7.12B.jar

mystcraft-1.7.10-0.12.3.00.jar

natura-1.7.10-2.2.0.1.jar

neiaddons-1.12.11.36-mc1.7.10.jar

NEIIntegration-MC1.7.10-1.0.12.jar

NetherOres-[1.7.10]2.3.0-12.jar

NotEnoughItems-1.7.10-1.0.4.107-universal.jar

NotEnoughKeys-1.7.10-1.0.0b29.jar

NotEnoughResources-1.7.10-0.1.0.106.jar

OpenBlocks-1.7.10-1.4.4.jar

OpenComputers-MC1.7.10-1.5.15.31-universal.jar

OpenModsLib-1.7.10-0.8.jar

OpenPeripheralAddons-1.7.10-0.4.jar

OpenPeripheralCore-1.7.10-1.2.jar

OpenPeripheralIntegration-1.7.10-0.3.jar

OpenSecurity-1.0-61.jar

Opis-1.2.5_1.7.10.jar

Pam's HarvestCraft 1.7.10j.jar

Peripherals++-1.3.2.jar

PortalGun-4.0.0-beta-5.jar

ProjectRed-1.7.10-4.7.0pre8.92-Base.jar

ProjectRed-1.7.10-4.7.0pre8.92-Compat.jar

ProjectRed-1.7.10-4.7.0pre8.92-Integration.jar

ProjectRed-1.7.10-4.7.0pre8.92-Lighting.jar

ProjectRed-1.7.10-4.7.0pre8.92-Mechanical.jar

ProjectRed-1.7.10-4.7.0pre8.92-World.jar

Railcraft_1.7.10-9.6.1.0.jar

ReactorCraft 1.7.10 V7f.jar

RedstoneArmory-1.7.10-1.2.0-35.jar

RedstoneArsenal-[1.7.10]1.1.1-89.jar

Reliquary-1.2.jar

rftools-3.30.jar

RotaryCraft 1.7.10 V7f.jar

runicdungeons-1.1.5c.jar

sampler-1.45.jar

SimplyJetpacks-MC1.7.10-1.5.1.jar

smallboats-1.7.10-10.13.0-16.1.jar

SolarExpansion-Basic-1.6a.jar

Springboards-1.7.10-0.1.jar

SSR-rc3.jar

Stackie-1.7.10-1.6.0.36-universal.jar

StevesAddons-1.7.10-0.10.16.jar

StevesCarts2.0.0.b18.jar

StevesFactoryManagerA93.jar

StevesWorkshop-0.5.1.jar

StorageDrawers-1.7.10-1.5.12.jar

TConstruct-1.7.10-1.8.5.jar

Thaumcraft-1.7.10-4.2.3.5.jar

thaumcraftneiplugin-1.7.10-1.7a.jar

thaumicenergistics-0.8.10.10.jar

ThaumicExploration-1.7.10-1.1-37.jar

ThaumicTinkerer-2.5-1.7.10-502.jar

ThermalDynamics-[1.7.10]1.1.0-161.jar

ThermalExpansion-[1.7.10]4.0.3B1-218.jar

ThermalFoundation-[1.7.10]1.2.0-102.jar

TickProfiler-1.7.10.39.jar

TiCTooltips-mc1.7.10-1.2.5.jar

TMechworks-1.7.10-0.2.14.100.jar

Translocator-1.7.10-1.1.1.14-universal.jar

ttCore-MC1.7.10-0.1.1-78.jar

twilightforest-1.7.10-2.3.7.jar

Waila-1.5.10_1.7.10.jar

WailaHarvestability-mc1.7.x-1.1.2.jar

Wawla-1.3.1-1.7.10.jar

witchery-1.7.10-0.24.1.jar

WR-CBE-1.7.10-1.4.1.9-universal.jar

Ztones-1.7.10-2.2.1.jar

 

 

[SanAndreaP]

My other server doesn't have this problem, and the modpack contains mostly the same mods, and no really intensive ones.

So, you are saying there are some mods which are different!?

 

If so, then try removing those mods one-by-one and see if that'll help.

 

 

What I'd also suggest is using visualvm (if your server supports GUIs)