Java "Error" server crash

Jay Avery · March 29, 2017

I have a server running my mod, and I've had this crash about three times over several days of playing. The crash completely shuts down the server when it happens. I can't figure out what's causing it or what it means.

The full crash report:

Spoiler


---- Minecraft Crash Report ----
// I feel sad now :(

Time: 3/29/17 10:01 PM
Description: Watching Server

java.lang.Error
	at net.minecraft.world.chunk.Chunk.func_177414_a(Chunk.java:904)
	at net.minecraft.world.World.func_175674_a(World.java:2971)
	at net.minecraft.world.World.func_72839_b(World.java:2954)
	at net.minecraft.world.World.func_184144_a(World.java:1356)
	at net.minecraft.entity.Entity.func_70091_d(Entity.java:706)
	at com.jayavery.jjmod.entities.FallingTreeBlock.func_70071_h_(FallingTreeBlock.java:112)
	at net.minecraft.world.World.func_72866_a(World.java:1961)
	at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:840)
	at net.minecraft.world.World.func_72870_g(World.java:1931)
	at net.minecraft.world.World.func_72939_s(World.java:1747)
	at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:621)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:720)
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:384)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:624)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:482)
	at java.lang.Thread.run(Unknown Source)


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

-- Head --
Thread: Server Watchdog
Stacktrace:
	at net.minecraft.world.chunk.Chunk.func_177414_a(Chunk.java:904)
	at net.minecraft.world.World.func_175674_a(World.java:2971)
	at net.minecraft.world.World.func_72839_b(World.java:2954)
	at net.minecraft.world.World.func_184144_a(World.java:1356)
	at net.minecraft.entity.Entity.func_70091_d(Entity.java:706)
	at com.jayavery.jjmod.entities.FallingTreeBlock.func_70071_h_(FallingTreeBlock.java:112)
	at net.minecraft.world.World.func_72866_a(World.java:1961)
	at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:840)
	at net.minecraft.world.World.func_72870_g(World.java:1931)
	at net.minecraft.world.World.func_72939_s(World.java:1747)
	at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:621)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:720)
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:384)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:624)

-- Thread Dump --
Details:
	Threads: "Netty Epoll Server IO #3" Id=36 RUNNABLE (in native)
	at io.netty.channel.epoll.Native.epollWait(Native Method)
	at io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:194)
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:219)
	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
	at java.lang.Thread.run(Unknown Source)


"Chunk I/O Executor Thread-1" Id=96 WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@5ca7b411
	at sun.misc.Unsafe.park(Native Method)
	-  waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@5ca7b411
	at java.util.concurrent.locks.LockSupport.park(Unknown Source)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
	at java.util.concurrent.LinkedBlockingQueue.take(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)


"Netty Epoll Server IO #2" Id=35 RUNNABLE (in native)
	at io.netty.channel.epoll.Native.epollWait(Native Method)
	at io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:194)
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:219)
	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
	at java.lang.Thread.run(Unknown Source)


"Netty Epoll Server IO #1" Id=34 RUNNABLE (in native)
	at io.netty.channel.epoll.Native.epollWait(Native Method)
	at io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:194)
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:219)
	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
	at java.lang.Thread.run(Unknown Source)


"File IO Thread" Id=83 TIMED_WAITING
	at java.lang.Thread.sleep(Native Method)
	at net.minecraft.world.storage.ThreadedFileIOBase.func_75736_b(SourceFile:51)
	at net.minecraft.world.storage.ThreadedFileIOBase.run(SourceFile:30)
	at java.lang.Thread.run(Unknown Source)


"Server Watchdog" Id=81 RUNNABLE
	at sun.management.ThreadImpl.dumpThreads0(Native Method)
	at sun.management.ThreadImpl.dumpAllThreads(Unknown Source)
	at net.minecraft.server.dedicated.ServerHangWatchdog.run(ServerHangWatchdog.java:46)
	at java.lang.Thread.run(Unknown Source)


"Netty Epoll Server IO #0" Id=33 RUNNABLE
	at io.netty.channel.epoll.Native.epollWait(Native Method)
	at io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:194)
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:219)
	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
	at java.lang.Thread.run(Unknown Source)


"Server console handler" Id=27 RUNNABLE (in native)
	at java.io.FileInputStream.readBytes(Native Method)
	at java.io.FileInputStream.read(Unknown Source)
	at java.io.BufferedInputStream.read1(Unknown Source)
	at java.io.BufferedInputStream.read(Unknown Source)
	-  locked java.io.BufferedInputStream@526051f5
	at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
	at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
	at sun.nio.cs.StreamDecoder.read(Unknown Source)
	-  locked java.io.InputStreamReader@565fdf61
	at java.io.InputStreamReader.read(Unknown Source)
	...


"DestroyJavaVM" Id=26 RUNNABLE


"Server thread" Id=24 RUNNABLE
	at net.minecraft.world.chunk.Chunk.func_177414_a(Chunk.java:904)
	at net.minecraft.world.World.func_175674_a(World.java:2971)
	at net.minecraft.world.World.func_72839_b(World.java:2954)
	at net.minecraft.world.World.func_184144_a(World.java:1356)
	at net.minecraft.entity.Entity.func_70091_d(Entity.java:706)
	at com.jayavery.jjmod.entities.FallingTreeBlock.func_70071_h_(FallingTreeBlock.java:112)
	at net.minecraft.world.World.func_72866_a(World.java:1961)
	at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:840)
	...


"Server Infinisleeper" Id=23 TIMED_WAITING
	at java.lang.Thread.sleep(Native Method)
	at net.minecraft.server.dedicated.DedicatedServer$1.run(DedicatedServer.java:78)


"Snooper Timer" Id=22 TIMED_WAITING on java.util.TaskQueue@135d5bce
	at java.lang.Object.wait(Native Method)
	-  waiting on java.util.TaskQueue@135d5bce
	at java.util.TimerThread.mainLoop(Unknown Source)
	at java.util.TimerThread.run(Unknown Source)


"Signal Dispatcher" Id=5 RUNNABLE


"Finalizer" Id=3 WAITING on java.lang.ref.ReferenceQueue$Lock@72bb6288
	at java.lang.Object.wait(Native Method)
	-  waiting on java.lang.ref.ReferenceQueue$Lock@72bb6288
	at java.lang.ref.ReferenceQueue.remove(Unknown Source)
	at java.lang.ref.ReferenceQueue.remove(Unknown Source)
	at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)


"Reference Handler" Id=2 WAITING on java.lang.ref.Reference$Lock@22046ad3
	at java.lang.Object.wait(Native Method)
	-  waiting on java.lang.ref.Reference$Lock@22046ad3
	at java.lang.Object.wait(Unknown Source)
	at java.lang.ref.Reference.tryHandlePending(Unknown Source)
	at java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)



Stacktrace:
	at net.minecraft.server.dedicated.ServerHangWatchdog.run(ServerHangWatchdog.java:63)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 1.11.2
	Operating System: Linux (amd64) version 2.6.32-642.6.2.el6.x86_64
	Java Version: 1.8.0_111, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 456719920 bytes (435 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 5 total; -Xmx1024M -Xms1024M -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:MaxMetaspaceSize=256M
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	FML: MCP 9.38 Powered by Forge 13.20.0.2228 5 mods loaded, 5 mods active
	States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
	UCHIJAAAA	minecraft{1.11.2} [Minecraft] (minecraft.jar) 
	UCHIJAAAA	mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
	UCHIJAAAA	FML{8.0.99.99} [Forge Mod Loader] (forge-1.11.2-13.20.0.2228-universal.jar) 
	UCHIJAAAA	forge{13.20.0.2228} [Minecraft Forge] (forge-1.11.2-13.20.0.2228-universal.jar) 
	UCHIJAAAA	jjmod{0.5.1} [JJ Mod] (jjmod-0.5.1-mc1.11.2.jar) 
	Loaded coremods (and transformers): 
	Profiler Position: N/A (disabled)
	Player Count: 1 / 25; [EntityPlayerMP['Viridian77'/4876, l='world6', x=214.32, y=72.00, z=233.34]]
	Is Modded: Definitely; Server brand changed to 'fml,forge'
	Type: Dedicated Server (map_server.txt)

I've figured out a deobfuscated version of that stack trace to save the trouble:

java.lang.Error
	at net.minecraft.world.chunk.Chunk.getEntitiesWithinAABBForEntity(Chunk.java:904)
	at net.minecraft.world.World.getEntitiesInAABBexcluding(World.java:2971)
	at net.minecraft.world.World.getEntitiesWithinAABBExcludingEntity(World.java:2954)
	at net.minecraft.world.World.getCollisionBoxes(World.java:1356)
	at net.minecraft.entity.Entity.move(Entity.java:706)
	at com.jayavery.jjmod.entities.FallingTreeBlock.onUpdate(FallingTreeBlock.java:112)
	at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:1961)
	at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:840)
	at net.minecraft.world.World.updateEntity(World.java:1931)
	at net.minecraft.world.World.updateEntities(World.java:1747)
	at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:621)
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:720)
	at net.minecraft.server.dedicated.DedicatedServer.updateTimeLightAndEntities(DedicatedServer.java:384)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:624)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:482)
	at java.lang.Thread.run(Unknown Source)

My FallingTreeBlock entity class is on github: https://github.com/JayAvery/jjmod/blob/develop/src/java/com/jayavery/jjmod/entities/FallingTreeBlock.java

The crash report seems to be about the most useless crash I've ever seen?? Just 'Error'? I have made some changes to the way collision boxes are calculated for my custom entity, so I'm sure that the problem is something to do with that. But I have no idea how to find out exactly what. The crash is extremely intermittent (it certainly doesn't happen every time my custom entity is spawned or moved). And the stack trace doesn't explicitly refer to any of the places where I've messed with collision boxes - it just happens in the collision box checks of the general Entity#move method.

Does anyone have any ideas?

Failender · March 29, 2017

why arent you extending the EntityFallingBlock..? I see a lot of copy pasta from that entity. Extend the entity and override what you need to

Jay Avery · March 29, 2017

The things I want to change are aspects of the main methods in EntityFallingBlock. If I extended it, I'd end up with pretty much the same result - I'd have to recreate most of the methods anyway in order to add my tweaks.

Choonster · March 30, 2017

This is a crash induced by ServerHangWatchdog because a tick took longer than the maximum tick time (1 minute by default). You'll probably have to do some profiling to figure out what's taking so long.

Jay Avery · March 30, 2017

I have no idea about profiling - do you have any advice on where to begin or learn?

But also, wouldn't that suggest it was a general lag issue? There doesn't seem to be significant lag generally, only when this crash happens (things stop responding for a few seconds before the server shuts down, which is presumably while the game is trying to run the tick that ends up taking a minute). So even if I do look at how long things are taking, it might not give me any useful information unless I am watching when the crash happens, which is currently completely unpredictable and very intermittent.

Choonster · March 30, 2017

3 hours ago, Jay Avery said:

I have no idea about profiling - do you have any advice on where to begin or learn?

Not really, I don't know much about it myself. I've seen people recommend VisualVM for this sort of thing, you may also be able to use Minecraft's Profiler class.

3 hours ago, Jay Avery said:

But also, wouldn't that suggest it was a general lag issue? There doesn't seem to be significant lag generally, only when this crash happens (things stop responding for a few seconds before the server shuts down, which is presumably while the game is trying to run the tick that ends up taking a minute). So even if I do look at how long things are taking, it might not give me any useful information unless I am watching when the crash happens, which is currently completely unpredictable and very intermittent.

If you enable profiling in Minecraft (/debug start), you may be able to add a shutdown hook (Runtime#addShutdownHook) that saves the profiling output to a file (e.g. by running /debug stop). This would allow you to see what took so long after the server is stopped by the watchdog.

Jay Avery · March 30, 2017

Thanks, I think I'll try the debug mode idea and see if I get anything useful.

jeffryfisher · March 30, 2017

getEntitiesWithinAABBForEntity

Does the error always have the same stack trace? If so, how big is the AABB that that is checked for bounding box collisions during the move?

I agree that stepping through this process, even when not in error, could alert you to a potential pitfall. You might also try adding a temporary exception handler so you can break within it and poke at more variables surrounding the error.

Jay Avery · March 30, 2017

4 minutes ago, jeffryfisher said:
getEntitiesWithinAABBForEntity
Does the error always have the same stack trace? If so, how big is the AABB that that is checked for bounding box collisions during the move?

I agree that stepping through this process, even when not in error, could alert you to a potential pitfall. You might also try adding a temporary exception handler so you can break within it and poke at more variables surrounding the error.

So far, the crash has happened three times, and it's been the same stack trace each time. The AABB is the same size as a vanilla falling block entity (0.98x0.98), so nothing extreme. And again, if that was the problem - wouldn't the crash (or at least very severe lag) happen any time the entity is spawned or moved?

I just tried to step through the method in the debugger but the server shut down because it thought it was crashed. Is there an easy workaround for that?

Jay Avery · April 1, 2017

Well, I have an update... but it's not good news.

The crash happened again today, but with a difference. When it crashed, I restarted the server (as I've done previously) but the crash happened again immediately on reconnecting. Repeated this again and the same thing happened again. But then, I tried connecting with a different client (Mac instead of Windows, if that could possibly be relevant??) and the crash didn't happen. Back to the first (Windows) client, and reconnecting triggered the crash again.

I didn't know it was even possible for a client to cause a server to crash, but that is definitely what seems to be happening. I thought the whole point of the server-client relationship was that the server is in control and the client is basically just receiving information and presenting it to the player?! And I can't think of anything different between the two clients other than the operating system - exact same version of the mod, forge, etc.

I used the debug profiling thing and got the following debug report when the server crashed. I don't really know how to interpret anything useful from this but if anyone has insight:

Spoiler


---- Minecraft Profiler Results ----
// Now with the same numbers

Time span: 3496318 ms
Tick span: 68660 ticks
// This is approximately 19.64 ticks per second. It should be 20 ticks per second

--- BEGIN PROFILE DUMP ---

[00] levels - 92.26%/92.26%
[01] |   world - 99.81%/92.08%
[02] |   |   tick - 97.70%/89.96%
[03] |   |   |   entities - 53.91%/48.50%
[04] |   |   |   |   regular - 99.25%/48.14%
[05] |   |   |   |   |   tick - 99.53%/49.18%
[06] |   |   |   |   |   |   travel - 27.06%/13.31%
[07] |   |   |   |   |   |   |   move - 59.32%/7.90%
[07] |   |   |   |   |   |   |   unspecified - 21.13%/2.81%
[07] |   |   |   |   |   |   |   rest - 19.55%/2.60%
[08] |   |   |   |   |   |   |   |   unspecified - 99.92%/2.60%
[08] |   |   |   |   |   |   |   |   checkLight - 0.08%/0.00%
[09] |   |   |   |   |   |   |   |   |   checkedPosition < toCheckCount - 97.59%/0.00%
[09] |   |   |   |   |   |   |   |   |   getBrightness - 1.33%/0.00%
[09] |   |   |   |   |   |   |   |   |   unspecified - 1.09%/0.00%
[06] |   |   |   |   |   |   unspecified - 25.25%/12.42%
[06] |   |   |   |   |   |   ai - 24.78%/12.19%
[07] |   |   |   |   |   |   |   newAi - 94.63%/11.54%
[08] |   |   |   |   |   |   |   |   unspecified - 29.18%/3.37%
[08] |   |   |   |   |   |   |   |   goalSelector - 23.39%/2.70%
[09] |   |   |   |   |   |   |   |   |   goalSetup - 65.89%/1.78%
[10] |   |   |   |   |   |   |   |   |   |   unspecified - 90.96%/1.62%
[10] |   |   |   |   |   |   |   |   |   |   pathfind - 9.04%/0.16%
[11] |   |   |   |   |   |   |   |   |   |   |   unspecified - 87.42%/0.14%
[11] |   |   |   |   |   |   |   |   |   |   |   checkLight - 3.87%/0.01%
[12] |   |   |   |   |   |   |   |   |   |   |   |   checkedPosition < toCheckCount - 69.86%/0.00%
[12] |   |   |   |   |   |   |   |   |   |   |   |   getBrightness - 17.85%/0.00%
[12] |   |   |   |   |   |   |   |   |   |   |   |   unspecified - 12.29%/0.00%
[11] |   |   |   |   |   |   |   |   |   |   |   checkedPosition < toCheckCount - 3.70%/0.01%
[11] |   |   |   |   |   |   |   |   |   |   |   recheckGaps - 3.62%/0.01%
[12] |   |   |   |   |   |   |   |   |   |   |   |   unspecified - 71.41%/0.00%
[12] |   |   |   |   |   |   |   |   |   |   |   |   getBrightness - 23.89%/0.00%
[12] |   |   |   |   |   |   |   |   |   |   |   |   checkedPosition < toCheckCount - 4.70%/0.00%
[11] |   |   |   |   |   |   |   |   |   |   |   getBrightness - 1.40%/0.00%
[09] |   |   |   |   |   |   |   |   |   unspecified - 29.70%/0.80%
[09] |   |   |   |   |   |   |   |   |   goalTick - 4.40%/0.12%
[10] |   |   |   |   |   |   |   |   |   |   unspecified - 95.74%/0.11%
[10] |   |   |   |   |   |   |   |   |   |   pathfind - 4.26%/0.01%
[10] |   |   |   |   |   |   |   |   |   |   checkLight - 0.00%/0.00%
[11] |   |   |   |   |   |   |   |   |   |   |   unspecified - 39.41%/0.00%
[11] |   |   |   |   |   |   |   |   |   |   |   getBrightness - 36.06%/0.00%
[11] |   |   |   |   |   |   |   |   |   |   |   checkedPosition < toCheckCount - 24.52%/0.00%
[10] |   |   |   |   |   |   |   |   |   |   checkedPosition < toCheckCount - 0.00%/0.00%
[10] |   |   |   |   |   |   |   |   |   |   getBrightness - 0.00%/0.00%
[08] |   |   |   |   |   |   |   |   controls - 19.51%/2.25%
[09] |   |   |   |   |   |   |   |   |   unspecified - 63.00%/1.42%
[09] |   |   |   |   |   |   |   |   |   look - 13.67%/0.31%
[09] |   |   |   |   |   |   |   |   |   move - 13.50%/0.30%
[09] |   |   |   |   |   |   |   |   |   jump - 9.83%/0.22%
[08] |   |   |   |   |   |   |   |   targetSelector - 14.74%/1.70%
[09] |   |   |   |   |   |   |   |   |   goalSetup - 57.02%/0.97%
[10] |   |   |   |   |   |   |   |   |   |   unspecified - 92.84%/0.90%
[10] |   |   |   |   |   |   |   |   |   |   canSee - 7.16%/0.07%
[09] |   |   |   |   |   |   |   |   |   unspecified - 42.98%/0.73%
[09] |   |   |   |   |   |   |   |   |   goalTick - 0.00%/0.00%
[08] |   |   |   |   |   |   |   |   navigation - 6.37%/0.73%
[09] |   |   |   |   |   |   |   |   |   unspecified - 99.98%/0.73%
[09] |   |   |   |   |   |   |   |   |   pathfind - 0.02%/0.00%
[08] |   |   |   |   |   |   |   |   checkDespawn - 3.21%/0.37%
[08] |   |   |   |   |   |   |   |   mob tick - 2.20%/0.25%
[09] |   |   |   |   |   |   |   |   |   unspecified - 100.00%/0.25%
[09] |   |   |   |   |   |   |   |   |   chunkCheck - 0.00%/0.00%
[08] |   |   |   |   |   |   |   |   sensing - 1.39%/0.16%
[07] |   |   |   |   |   |   |   unspecified - 5.37%/0.65%
[06] |   |   |   |   |   |   move - 7.78%/3.83%
[06] |   |   |   |   |   |   entityBaseTick - 5.66%/2.78%
[07] |   |   |   |   |   |   |   unspecified - 94.72%/2.64%
[07] |   |   |   |   |   |   |   portal - 5.28%/0.15%
[06] |   |   |   |   |   |   livingEntityBaseTick - 5.01%/2.46%
[06] |   |   |   |   |   |   push - 1.59%/0.78%
[06] |   |   |   |   |   |   rest - 0.65%/0.32%
[06] |   |   |   |   |   |   mobBaseTick - 0.60%/0.29%
[06] |   |   |   |   |   |   headTurn - 0.55%/0.27%
[06] |   |   |   |   |   |   chunkCheck - 0.34%/0.17%
[06] |   |   |   |   |   |   jump - 0.19%/0.10%
[06] |   |   |   |   |   |   rangeChecks - 0.19%/0.09%
[06] |   |   |   |   |   |   looting - 0.16%/0.08%
[06] |   |   |   |   |   |   checkLight - 0.08%/0.04%
[07] |   |   |   |   |   |   |   checkedPosition < toCheckCount - 42.01%/0.02%
[07] |   |   |   |   |   |   |   getBrightness - 35.82%/0.01%
[07] |   |   |   |   |   |   |   unspecified - 22.17%/0.01%
[06] |   |   |   |   |   |   checkedPosition < toCheckCount - 0.06%/0.03%
[06] |   |   |   |   |   |   getBrightness - 0.03%/0.02%
[06] |   |   |   |   |   |   portal - 0.00%/0.00%
[05] |   |   |   |   |   remove - 0.47%/0.23%
[05] |   |   |   |   |   chunkCheck - 0.00%/0.00%
[04] |   |   |   |   players - 0.36%/0.17%
[05] |   |   |   |   |   tick - 90.71%/0.16%
[06] |   |   |   |   |   |   unspecified - 98.34%/0.15%
[06] |   |   |   |   |   |   chunkCheck - 1.65%/0.00%
[06] |   |   |   |   |   |   checkedPosition < toCheckCount - 0.00%/0.00%
[06] |   |   |   |   |   |   getBrightness - 0.00%/0.00%
[06] |   |   |   |   |   |   checkLight - 0.00%/0.00%
[07] |   |   |   |   |   |   |   unspecified - 47.88%/0.00%
[07] |   |   |   |   |   |   |   getBrightness - 34.35%/0.00%
[07] |   |   |   |   |   |   |   checkedPosition < toCheckCount - 17.76%/0.00%
[05] |   |   |   |   |   unspecified - 8.76%/0.02%
[05] |   |   |   |   |   remove - 0.53%/0.00%
[04] |   |   |   |   blockEntities - 0.29%/0.14%
[05] |   |   |   |   |   unspecified - 85.77%/0.12%
[05] |   |   |   |   |   TileEntityMobSpawner - 9.92%/0.01%
[05] |   |   |   |   |   TileEntityChest - 4.16%/0.01%
[05] |   |   |   |   |   TECraftingKnapping - 0.16%/0.00%
[04] |   |   |   |   remove - 0.05%/0.02%
[04] |   |   |   |   unspecified - 0.05%/0.02%
[04] |   |   |   |   global - 0.00%/0.00%
[04] |   |   |   |   pendingBlockEntities - 0.00%/0.00%
[03] |   |   |   tickBlocks - 42.11%/37.89%
[04] |   |   |   |   pollingChunks - 99.72%/37.78%
[05] |   |   |   |   |   tickChunk - 66.77%/25.22%
[06] |   |   |   |   |   |   unspecified - 71.44%/18.02%
[06] |   |   |   |   |   |   getBrightness - 20.64%/5.21%
[06] |   |   |   |   |   |   recheckGaps - 6.42%/1.62%
[07] |   |   |   |   |   |   |   unspecified - 70.39%/1.14%
[07] |   |   |   |   |   |   |   getBrightness - 22.17%/0.36%
[07] |   |   |   |   |   |   |   checkedPosition < toCheckCount - 7.44%/0.12%
[06] |   |   |   |   |   |   checkedPosition < toCheckCount - 1.51%/0.38%
[05] |   |   |   |   |   tickBlocks - 23.26%/8.79%
[06] |   |   |   |   |   |   unspecified - 76.46%/6.72%
[06] |   |   |   |   |   |   randomTick - 23.54%/2.07%
[07] |   |   |   |   |   |   |   unspecified - 99.06%/2.05%
[07] |   |   |   |   |   |   |   checkLight - 0.52%/0.01%
[08] |   |   |   |   |   |   |   |   checkedPosition < toCheckCount - 77.57%/0.01%
[08] |   |   |   |   |   |   |   |   getBrightness - 18.19%/0.00%
[08] |   |   |   |   |   |   |   |   unspecified - 4.24%/0.00%
[07] |   |   |   |   |   |   |   checkedPosition < toCheckCount - 0.35%/0.01%
[07] |   |   |   |   |   |   |   getBrightness - 0.08%/0.00%
[05] |   |   |   |   |   unspecified - 7.59%/2.87%
[05] |   |   |   |   |   regularChunkLoading - 1.07%/0.40%
[05] |   |   |   |   |   iceandsnow - 0.54%/0.20%
[05] |   |   |   |   |   getChunk - 0.32%/0.12%
[05] |   |   |   |   |   thunder - 0.22%/0.08%
[05] |   |   |   |   |   checkNextLight - 0.20%/0.08%
[05] |   |   |   |   |   forcedChunkLoading - 0.03%/0.01%
[04] |   |   |   |   playerCheckLight - 0.20%/0.07%
[05] |   |   |   |   |   getBrightness - 50.77%/0.04%
[05] |   |   |   |   |   unspecified - 47.01%/0.03%
[05] |   |   |   |   |   checkedPosition < toCheckCount - 2.22%/0.00%
[04] |   |   |   |   unspecified - 0.09%/0.03%
[03] |   |   |   chunkMap - 1.93%/1.74%
[04] |   |   |   |   unspecified - 92.59%/1.61%
[04] |   |   |   |   checkedPosition < toCheckCount - 3.34%/0.06%
[04] |   |   |   |   checkLight - 2.59%/0.04%
[05] |   |   |   |   |   checkedPosition < toCheckCount - 61.85%/0.03%
[05] |   |   |   |   |   unspecified - 19.28%/0.01%
[05] |   |   |   |   |   getBrightness - 18.87%/0.01%
[04] |   |   |   |   getBrightness - 1.49%/0.03%
[03] |   |   |   mobSpawner - 1.19%/1.07%
[03] |   |   |   tickPending - 0.48%/0.43%
[04] |   |   |   |   ticking - 88.64%/0.38%
[05] |   |   |   |   |   unspecified - 53.84%/0.20%
[05] |   |   |   |   |   checkLight - 38.79%/0.15%
[06] |   |   |   |   |   |   checkedPosition < toCheckCount - 76.56%/0.11%
[06] |   |   |   |   |   |   getBrightness - 21.60%/0.03%
[06] |   |   |   |   |   |   unspecified - 1.84%/0.00%
[05] |   |   |   |   |   checkedPosition < toCheckCount - 5.50%/0.02%
[05] |   |   |   |   |   getBrightness - 1.86%/0.01%
[05] |   |   |   |   |   pathfind - 0.01%/0.00%
[04] |   |   |   |   unspecified - 6.45%/0.03%
[04] |   |   |   |   cleaning - 4.91%/0.02%
[03] |   |   |   chunkSource - 0.22%/0.20%
[03] |   |   |   unspecified - 0.14%/0.12%
[03] |   |   |   village - 0.01%/0.01%
[03] |   |   |   portalForcer - 0.00%/0.00%
[02] |   |   tracker - 2.25%/2.07%
[02] |   |   unspecified - 0.04%/0.04%
[02] |   |   timeSync - 0.00%/0.00%
[01] |   unspecified - 0.19%/0.17%
[01] |   checkedPosition < toCheckCount - 0.00%/0.00%
[01] |   checkLight - 0.00%/0.00%
[02] |   |   checkedPosition < toCheckCount - 49.20%/0.00%
[02] |   |   unspecified - 27.67%/0.00%
[02] |   |   getBrightness - 23.12%/0.00%
[01] |   getBrightness - 0.00%/0.00%
[01] |   recheckGaps - 0.00%/0.00%
[02] |   |   unspecified - 70.42%/0.00%
[02] |   |   getBrightness - 25.45%/0.00%
[02] |   |   checkedPosition < toCheckCount - 4.14%/0.00%
[00] connection - 6.57%/6.57%
[01] |   unspecified - 97.02%/6.38%
[01] |   travel - 1.76%/0.12%
[02] |   |   move - 45.77%/0.05%
[02] |   |   unspecified - 32.64%/0.04%
[02] |   |   rest - 21.60%/0.02%
[01] |   livingEntityBaseTick - 0.38%/0.02%
[01] |   entityBaseTick - 0.37%/0.02%
[02] |   |   unspecified - 88.05%/0.02%
[02] |   |   portal - 11.95%/0.00%
[01] |   ai - 0.21%/0.01%
[02] |   |   unspecified - 70.45%/0.01%
[02] |   |   newAi - 29.55%/0.00%
[01] |   push - 0.13%/0.01%
[01] |   headTurn - 0.06%/0.00%
[01] |   keepAlive - 0.06%/0.00%
[01] |   rangeChecks - 0.01%/0.00%
[01] |   jump - 0.01%/0.00%
[00] save - 0.92%/0.92%
[00] jobs - 0.18%/0.18%
[01] |   unspecified - 78.84%/0.14%
[01] |   rest - 10.77%/0.02%
[01] |   move - 10.13%/0.02%
[01] |   checkLight - 0.17%/0.00%
[02] |   |   checkedPosition < toCheckCount - 48.43%/0.00%
[02] |   |   getBrightness - 36.08%/0.00%
[02] |   |   unspecified - 15.49%/0.00%
[01] |   getBrightness - 0.05%/0.00%
[01] |   checkedPosition < toCheckCount - 0.04%/0.00%
[01] |   pathfind - 0.01%/0.00%
[00] unspecified - 0.06%/0.06%
[00] dim_unloading - 0.00%/0.00%
[00] players - 0.00%/0.00%
[00] tallying - 0.00%/0.00%
[00] snooper - 0.00%/0.00%
[00] tickables - 0.00%/0.00%
--- END PROFILE DUMP ---

jeffryfisher · April 2, 2017

If you need help with a crash, find the log file (not console) and post it. If there's a client issue, post its log too. Since the debugger seems to be giving you difficulty, you may need to insert some statements to produce more informative text output.

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