The not-crash crash

Output of the event:

ERROR 12:33:22

--- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH - git-Paper-187 (MC: 1.14.4) ---
The server has not responded for 12 seconds! Creating thread dump
------------------------------
Server thread dump (Look for plugins here before reporting to Paper!):
The server is waiting on these chunks: []
------------------------------
Current Thread: Server thread
PID: 22 | Suspended: false | Native: false | State: RUNNABLE
Stack:
net.minecraft.server.v1_14_R1.VoxelShapeBitSet.b(SourceFile:94)
net.minecraft.server.v1_14_R1.VoxelShape.c(VoxelShape.java:26)
net.minecraft.server.v1_14_R1.VoxelShapes.c(VoxelShapes.java:150)
net.minecraft.server.v1_14_R1.Entity.e(Entity.java:798)
net.minecraft.server.v1_14_R1.Entity.move(Entity.java:560)
net.minecraft.server.v1_14_R1.EntityLiving.e(EntityLiving.java:2208)
net.minecraft.server.v1_14_R1.EntityLiving.movementTick(EntityLiving.java:2559)
net.minecraft.server.v1_14_R1.EntityInsentient.movementTick(EntityInsentient.java:504)
net.minecraft.server.v1_14_R1.EntityMonster.movementTick(EntityMonster.java:23)
net.minecraft.server.v1_14_R1.EntityZombie.movementTick(EntityZombie.java:209)
net.minecraft.server.v1_14_R1.EntityLiving.tick(EntityLiving.java:2321)
net.minecraft.server.v1_14_R1.EntityInsentient.tick(EntityInsentient.java:275)
net.minecraft.server.v1_14_R1.EntityMonster.tick(EntityMonster.java:37)
net.minecraft.server.v1_14_R1.EntityZombie.tick(EntityZombie.java:180)
net.minecraft.server.v1_14_R1.WorldServer.entityJoinedWorld(WorldServer.java:665)
net.minecraft.server.v1_14_R1.WorldServer$$Lambda$3493/1280232103.accept(Unknown Source)
net.minecraft.server.v1_14_R1.World.a(World.java:936)
net.minecraft.server.v1_14_R1.WorldServer.doTick(WorldServer.java:437)
net.minecraft.server.v1_14_R1.MinecraftServer.b(MinecraftServer.java:1208)
net.minecraft.server.v1_14_R1.DedicatedServer.b(DedicatedServer.java:417)
net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:1075)
net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:919)
java.lang.Thread.run(Thread.java:748)
------------------------------
--- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH ---
------------------------------

12:33:40
--- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH - git-Paper-187 (MC: 1.14.4) ---
The server has not responded for 17 seconds! Creating thread dump
------------------------------
Server thread dump (Look for plugins here before reporting to Paper!):
The server is waiting on these chunks: []
------------------------------

12:33:57
Current Thread: Server thread

12:35:06
PID: 22 | Suspended: false | Native: false | State: RUNNABLE

12:35:43
Stack:
net.minecraft.server.v1_14_R1.Entity.move(Entity.java:698)
net.minecraft.server.v1_14_R1.EntityFish.e(EntityFish.java:93)
net.minecraft.server.v1_14_R1.EntityLiving.movementTick(EntityLiving.java:2559)
net.minecraft.server.v1_14_R1.EntityInsentient.movementTick(EntityInsentient.java:504)
net.minecraft.server.v1_14_R1.EntityFish.movementTick(EntityFish.java:113)
net.minecraft.server.v1_14_R1.EntityLiving.tick(EntityLiving.java:2321)

12:35:57
net.minecraft.server.v1_14_R1.EntityInsentient.tick(EntityInsentient.java:275)

12:36:42
net.minecraft.server.v1_14_R1.EntityFishSchool.tick(SourceFile:75)

12:36:56
net.minecraft.server.v1_14_R1.WorldServer.entityJoinedWorld(WorldServer.java:665)
net.minecraft.server.v1_14_R1.WorldServer$$Lambda$3493/1280232103.accept(Unknown Source)
net.minecraft.server.v1_14_R1.World.a(World.java:936)
net.minecraft.server.v1_14_R1.WorldServer.doTick(WorldServer.java:437)
net.minecraft.server.v1_14_R1.MinecraftServer.b(MinecraftServer.java:1208)
net.minecraft.server.v1_14_R1.DedicatedServer.b(DedicatedServer.java:417)
net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:1075)
net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:919)
java.lang.Thread.run(Thread.java:748)
------------------------------
--- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH ---
------------------------------
--- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH - git-Paper-187 (MC: 1.14.4) ---
The server has not responded for 34 seconds! Creating thread dump
------------------------------
Server thread dump (Look for plugins here before reporting to Paper!):
The server is waiting on these chunks: []
------------------------------
Current Thread: Server thread
PID: 22 | Suspended: false | Native: false | State: RUNNABLE
Stack:
java.util.Random.nextInt(Random.java:390)
net.minecraft.server.v1_14_R1.PathfinderGoalFleeSun.h(SourceFile:76)
net.minecraft.server.v1_14_R1.PathfinderGoalFleeSun.g(SourceFile:50)
net.minecraft.server.v1_14_R1.PathfinderGoalFleeSun.a(SourceFile:46)
net.minecraft.server.v1_14_R1.PathfinderGoalWrapped.a(SourceFile:22)
net.minecraft.server.v1_14_R1.PathfinderGoalSelector$$Lambda$3523/461729585.test(Unknown Source)
java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
java.util.Iterator.forEachRemaining(Iterator.java:116)
java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)

12:37:11
java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)

12:37:13
java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)

12:40:12
java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)

Plugin List:

Plugins (23): AsyncWorldEdit, BlockLocker, CoreProtect, dynmap*, Dynmap-WorldGuard*, Essentials, EssentialsAntiBuild, EssentialsChat, EssentialsGeoIP, EssentialsProtect, EssentialsSpawn, GriefPrevention, Horizon, LuckPerms, mcMMO, Multiverse-Core, Multiverse-Portals, OpenInv*, Plan, WorldBorder, WorldEdit, WorldEditSelectionVisualizer, WorldGuard

This event, invariably, makes the instance completely unresponsive. I can’t seem to narrow down the cause; it’s entirely random.

Any thoughts?

Your server is basically overloaded in general

What am I missing here?

It does this with 0 or 10 people on. This specific instance happened while no one was online, I just happened to hear the CPU fan spinning up and winding down repeatedly. It’s doing “something”, just not responding to any requests.

Host CPU = i7-5775R CPU @ 3.30GHz

It would be very helpful if you could provide timings for us (use /timings paste).

https://timings.aikar.co/?id=8743b416af934da2bf2a47261d01db13

About an hour after this, the same thing happened. Timings doesn’t return if it’s in that state, so I can only get them prior to it happening.