[MC-127242] Drowned causes crashes (ticking entity)

The bug

Drowned causes the game to randomly crash.

A code analysis by @unknown can be found in this comment.

Linked issues

is duplicated by 19

MC-127243 Drowned causes frequent and random crashes Resolved

MC-127306 Entities causing ticking entity crash Resolved

MC-127328 Crash after sleeping in bed Resolved

MC-127390 [18w11a] minecraft:drowned Ticking entity crashing server Resolved

MC-127412 18w11a bug Resolved

14 more links

Attachments

crash-2018-03-13_23.28.43-server.txt

Comments 21

Greener 2018-03-14T10:33:03Z

Affects 18w11a.

DaMaloma 2018-03-14T10:55:57Z

This crashed our server last night with the exact same crash report. We solved it by issuing the kill command, but are of course hoping the underlying bug will be resolved.

DuckDuckLoop 2018-03-14T13:03:56Z

This happened to me also, I am unable to get into my world because it crashes as soon as I get into it. Deleting drowned with an NBT editor allows me to get back in, but I am right next to a zombie spawner so within seconds it crashes again.

Sabrejack 2018-03-14T13:06:10Z

I also have this issue on my linux multiplayer server.
For now, I did /kill @e[type=drowned] and /gamerule doMobSpawn false so we can at least play without mobs until a fix.

Seth Robichaud 2018-03-15T00:38:40Z

temporary fix without killing/disabling mobs is to switch back to 18w10d until this is resolved. Worked for me.

11 more comments

gnembon 2018-03-15T14:01:24Z

by analyzing decompiled sources of 18w11a, I managed to track down that afn and afj classes both descend from afk class, which happened to map to net/minecraft/pathfinding/PathNavigate in 1.12 and afn and afj to zb and zf in 1.12 source, which is net/minecraft/pathfinding/PathNavigateGround and net/minecraft/pathfinding/PathNavigateSwimmer. Seems like zombies AI tasks are wrongly mapped between these two subclasses.
The error happens in the equivalent class of net/minecraft/entity/ai/EntityAIDoorInteract (wu in 1.12)
based on the lines and code structure, this happens when Drowned tries exexute this statment (attached screenshot)

Antonio Santos Saavedra 2018-03-15T17:49:00Z

Same problem here. I just switched my server to peaceful and it works now. Hope mojang fix it asap.

Nigel Todman 2018-03-16T18:08:52Z

Can confirm on Win7 x64 18w11a

Server has crashed twice.

Here's one of my crash reports

--
---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 3/15/18 2:56 PM
Description: Ticking entity

java.lang.ClassCastException: afn cannot be cast to afj
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at rp.w(SourceFile:354)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	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 thread
Stacktrace:
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)

-- Entity being ticked --
Details:
	Entity Type: minecraft:drowned (ajg)
	Entity ID: 29492
	Entity Name: Drowned
	Entity's Exact location: -12541.50, 41.98, 6687.40
	Entity's Block location: World: (-12542,41,6687), Chunk: (at 2,2,15 in -784,417; contains blocks -12544,0,6672 to -12529,255,6687), Region: (-25,13; contains chunks -800,416 to -769,447, blocks -12800,0,6656 to -12289,255,7167)
	Entity's Momentum: 0.00, -0.10, -0.03
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)

-- Affected level --
Details:
	Level name: world
	All players: 2 total; [sg['Matrix_Dev'/10887, l='world', x=-12459.31, y=71.00, z=6659.39], sg['Lighttt_'/12855, l='world', x=-12474.19, y=71.00, z=6654.64]]
	Chunk stats: ServerChunkCache: 588 Drop: 0
	Level seed: 1505535
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (192,64,-12), Chunk: (at 0,4,4 in 12,-1; contains blocks 192,0,-16 to 207,255,-1), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 2848325 game time, 3160263 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 127503 (now: false), thunder time: 91932 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at rp.w(SourceFile:354)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 18w11a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_161, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 303977672 bytes (289 MB) / 624951296 bytes (596 MB) up to 3808428032 bytes (3632 MB)
	JVM Flags: 0 total; 
	Profiler Position: N/A (disabled)
	Player Count: 2 / 100; [sg['Matrix_Dev'/10887, l='world', x=-12459.31, y=71.00, z=6659.39], sg['Lighttt_'/12855, l='world', x=-12474.19, y=71.00, z=6654.64]]
	Data Packs: vanilla, file/veritas0923 (incompatible)
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)

--
---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 3/15/18 2:56 PM
Description: Ticking entity

java.lang.ClassCastException: afn cannot be cast to afj
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at rp.w(SourceFile:354)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	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 thread
Stacktrace:
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)

-- Entity being ticked --
Details:
	Entity Type: minecraft:drowned (ajg)
	Entity ID: 29492
	Entity Name: Drowned
	Entity's Exact location: -12541.50, 41.98, 6687.40
	Entity's Block location: World: (-12542,41,6687), Chunk: (at 2,2,15 in -784,417; contains blocks -12544,0,6672 to -12529,255,6687), Region: (-25,13; contains chunks -800,416 to -769,447, blocks -12800,0,6656 to -12289,255,7167)
	Entity's Momentum: 0.00, -0.10, -0.03
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)

-- Affected level --
Details:
	Level name: world
	All players: 2 total; [sg['Matrix_Dev'/10887, l='world', x=-12459.31, y=71.00, z=6659.39], sg['Lighttt_'/12855, l='world', x=-12474.19, y=71.00, z=6654.64]]
	Chunk stats: ServerChunkCache: 588 Drop: 0
	Level seed: 1505535
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (192,64,-12), Chunk: (at 0,4,4 in 12,-1; contains blocks 192,0,-16 to 207,255,-1), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 2848325 game time, 3160263 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 127503 (now: false), thunder time: 91932 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at rp.w(SourceFile:354)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 18w11a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_161, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 303977672 bytes (289 MB) / 624951296 bytes (596 MB) up to 3808428032 bytes (3632 MB)
	JVM Flags: 0 total; 
	Profiler Position: N/A (disabled)
	Player Count: 2 / 100; [sg['Matrix_Dev'/10887, l='world', x=-12459.31, y=71.00, z=6659.39], sg['Lighttt_'/12855, l='world', x=-12474.19, y=71.00, z=6654.64]]
	Data Packs: vanilla, file/veritas0923 (incompatible)
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)

Bart van der Braak 2018-03-19T23:34:34Z

If you encounter this problem, you can fix it by using a NBT editor (e.g. NBTExplorer) and set your gamemode to peaceful (level.dat → Data → Difficulty → set to 0). However, it can happen again after setting your difficulty such that Drowneds will spawn.

Andrew 2018-03-20T10:38:18Z

Another Drowned crash Hope it helps

and incase it makes a difference i was playing with bubble streams and upside down stares in a bubble stream

OpenJDK 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
[12:27:08] [Client thread/INFO]: Setting user: MEMEME
[12:27:09] [Client thread/WARN]: Skipping bad option: lastServer:
[12:27:09] [Client thread/INFO]: LWJGL Version: 3.1.2 build 29
[12:27:09] [Client thread/INFO]: Reloading ResourceManager: Default
[12:27:10] [Sound Library Loader/INFO]: Starting up SoundSystem...
[12:27:10] [Thread-2/INFO]: Initializing No Sound
[12:27:10] [Thread-2/INFO]: (Silent Mode)
[12:27:10] [Thread-2/INFO]: OpenAL initialized.
[12:27:10] [Sound Library Loader/INFO]: Preloading sound minecraft:sounds/ambient/underwater/underwater_ambience.ogg
[12:27:10] [Sound Library Loader/INFO]: Sound engine started
[12:27:11] [Client thread/INFO]: Created: 1024x512 textures-atlas
[12:27:12] [Client thread/INFO]: Narrator library successfully loaded
[12:27:12] [Client thread/ERROR]: Realms module missing
[12:27:18] [Client thread/WARN]: Ambiguity between arguments [teleport, destination] and [teleport, targets] with inputs: [Player, 0123, @e, dd12be42-52a9-4a91-a8a1-11c01849e498]
[12:27:18] [Client thread/WARN]: Ambiguity between arguments [teleport, location] and [teleport, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[12:27:18] [Client thread/WARN]: Ambiguity between arguments [teleport, location] and [teleport, targets] with inputs: [0.1 -0.5 .9, 0 0 0]
[12:27:18] [Client thread/WARN]: Ambiguity between arguments [teleport, targets] and [teleport, destination] with inputs: [Player, 0123, dd12be42-52a9-4a91-a8a1-11c01849e498]
[12:27:18] [Client thread/WARN]: Ambiguity between arguments [teleport, targets, location] and [teleport, targets, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[12:27:18] [Client thread/INFO]: Loaded 0 recipes
[12:27:18] [Client thread/INFO]: Loaded 0 advancements
[12:27:18] [Server thread/INFO]: Starting integrated minecraft server version 18w11a
[12:27:18] [Server thread/INFO]: Generating keypair
[12:27:19] [Server thread/INFO]: Reloading ResourceManager: Default
[12:27:19] [Server thread/INFO]: Loaded 519 recipes
[12:27:19] [Server thread/INFO]: Loaded 562 advancements
[12:27:19] [Server thread/INFO]: Preparing start region for level 0
[12:27:19] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:19] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:19] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Changing view distance to 12, from 10
[12:27:22] [Server thread/INFO]: MEMEME[local:E:9cabb5c3] logged in with entity id 128 at (1501.6205663607718, 60.680039828981215, 829.0207043670652)
[12:27:22] [Server thread/INFO]: MEMEME joined the game
[12:27:23] [Client thread/INFO]: Loaded 204 advancements
[12:27:24] [Client thread/WARN]: Unable to play empty soundEvent: minecraft:entity.cod.ambient
[12:27:24] [Server thread/ERROR]: Encountered an unexpected exception
h: Ticking entity
	at net.minecraft.server.MinecraftServer.w(SourceFile:706) ~[18w11a.jar:?]
	at net.minecraft.server.MinecraftServer.v(SourceFile:627) ~[18w11a.jar:?]
	at czd.v(SourceFile:155) ~[18w11a.jar:?]
	at net.minecraft.server.MinecraftServer.run(SourceFile:532) [18w11a.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.ClassCastException: afn cannot be cast to afj
	at adb.a(SourceFile:41) ~[18w11a.jar:?]
	at acz.a(SourceFile:22) ~[18w11a.jar:?]
	at adl.a(SourceFile:94) ~[18w11a.jar:?]
	at abw.cL(SourceFile:644) ~[18w11a.jar:?]
	at abv.l(SourceFile:1895) ~[18w11a.jar:?]
	at abw.l(SourceFile:504) ~[18w11a.jar:?]
	at ajs.l(SourceFile:33) ~[18w11a.jar:?]
	at aki.l(SourceFile:257) ~[18w11a.jar:?]
	at abv.S_(SourceFile:1750) ~[18w11a.jar:?]
	at abw.S_(SourceFile:284) ~[18w11a.jar:?]
	at ajs.S_(SourceFile:38) ~[18w11a.jar:?]
	at aki.S_(SourceFile:232) ~[18w11a.jar:?]
	at ajg.S_(SourceFile:252) ~[18w11a.jar:?]
	at aug.a(SourceFile:1617) ~[18w11a.jar:?]
	at se.a(SourceFile:705) ~[18w11a.jar:?]
	at aug.h(SourceFile:1593) ~[18w11a.jar:?]
	at aug.p_(SourceFile:1475) ~[18w11a.jar:?]
	at se.p_(SourceFile:538) ~[18w11a.jar:?]
	at net.minecraft.server.MinecraftServer.w(SourceFile:702) ~[18w11a.jar:?]
	... 4 more
[12:27:24] [Server thread/ERROR]: This crash report has been saved to: /home/~/.minecraft-beta/crash-reports/crash-2018-03-20_12.27.24-server.txt
[12:27:24] [Server thread/INFO]: Stopping server
[12:27:24] [Server thread/INFO]: Saving players
[12:27:24] [Server thread/INFO]: MEMEME lost connection: Disconnected
[12:27:24] [Server thread/INFO]: MEMEME left the game
[12:27:24] [Server thread/INFO]: Saving worlds
[12:27:24] [Server thread/INFO]: Saving chunks for level 'beta10'/overworld
---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 2018/03/20 12:27 PM
Description: Ticking entity

java.lang.ClassCastException: afn cannot be cast to afj
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at czd.v(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Thread.java:748)


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

-- Head --
Thread: Client thread
Stacktrace:
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)

-- Entity being ticked --
Details:
	Entity Type: minecraft:drowned (ajg)
	Entity ID: 132
	Entity Name: Drowned
	Entity's Exact location: 1497.20, 59.55, 830.86
	Entity's Block location: World: (1497,59,830), Chunk: (at 9,3,14 in 93,51; contains blocks 1488,0,816 to 1503,255,831), Region: (2,1; contains chunks 64,32 to 95,63, blocks 1024,0,512 to 1535,255,1023)
	Entity's Momentum: 0.00, 0.43, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)

-- Affected level --
Details:
	Level name: beta10
	All players: 1 total; [sg['MEMEME'/128, l='beta10', x=1501.62, y=60.68, z=829.02]]
	Chunk stats: ServerChunkCache: 1250 Drop: 0
	Level seed: -1392484337
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-16,64,66), Chunk: (at 0,4,2 in -1,4; contains blocks -16,0,64 to -1,255,79), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 278497 game time, 36115 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 18692 (now: true), thunder time: 63512 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at czd.v(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Thread.java:748)

-- System Details --
Details:
	Minecraft Version: 18w11a
	Operating System: Linux (amd64) version 4.4.0-116-generic
	Java Version: 1.8.0_151, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 174802872 bytes (166 MB) / 443535360 bytes (422 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 5 total; -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [sg['MEMEME'/128, l='beta10', x=1501.62, y=60.68, z=829.02]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
#@!@# Game crashed! Crash report saved to: #@!@# /home/~/.minecraft-beta/crash-reports/crash-2018-03-20_12.27.24-server.txt
AL lib: (EE) alc_cleanup: 1 device not closed

OpenJDK 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
[12:27:08] [Client thread/INFO]: Setting user: MEMEME
[12:27:09] [Client thread/WARN]: Skipping bad option: lastServer:
[12:27:09] [Client thread/INFO]: LWJGL Version: 3.1.2 build 29
[12:27:09] [Client thread/INFO]: Reloading ResourceManager: Default
[12:27:10] [Sound Library Loader/INFO]: Starting up SoundSystem...
[12:27:10] [Thread-2/INFO]: Initializing No Sound
[12:27:10] [Thread-2/INFO]: (Silent Mode)
[12:27:10] [Thread-2/INFO]: OpenAL initialized.
[12:27:10] [Sound Library Loader/INFO]: Preloading sound minecraft:sounds/ambient/underwater/underwater_ambience.ogg
[12:27:10] [Sound Library Loader/INFO]: Sound engine started
[12:27:11] [Client thread/INFO]: Created: 1024x512 textures-atlas
[12:27:12] [Client thread/INFO]: Narrator library successfully loaded
[12:27:12] [Client thread/ERROR]: Realms module missing
[12:27:18] [Client thread/WARN]: Ambiguity between arguments [teleport, destination] and [teleport, targets] with inputs: [Player, 0123, @e, dd12be42-52a9-4a91-a8a1-11c01849e498]
[12:27:18] [Client thread/WARN]: Ambiguity between arguments [teleport, location] and [teleport, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[12:27:18] [Client thread/WARN]: Ambiguity between arguments [teleport, location] and [teleport, targets] with inputs: [0.1 -0.5 .9, 0 0 0]
[12:27:18] [Client thread/WARN]: Ambiguity between arguments [teleport, targets] and [teleport, destination] with inputs: [Player, 0123, dd12be42-52a9-4a91-a8a1-11c01849e498]
[12:27:18] [Client thread/WARN]: Ambiguity between arguments [teleport, targets, location] and [teleport, targets, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[12:27:18] [Client thread/INFO]: Loaded 0 recipes
[12:27:18] [Client thread/INFO]: Loaded 0 advancements
[12:27:18] [Server thread/INFO]: Starting integrated minecraft server version 18w11a
[12:27:18] [Server thread/INFO]: Generating keypair
[12:27:19] [Server thread/INFO]: Reloading ResourceManager: Default
[12:27:19] [Server thread/INFO]: Loaded 519 recipes
[12:27:19] [Server thread/INFO]: Loaded 562 advancements
[12:27:19] [Server thread/INFO]: Preparing start region for level 0
[12:27:19] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:19] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:19] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Preparing spawn area: 0%
[12:27:20] [Server thread/INFO]: Changing view distance to 12, from 10
[12:27:22] [Server thread/INFO]: MEMEME[local:E:9cabb5c3] logged in with entity id 128 at (1501.6205663607718, 60.680039828981215, 829.0207043670652)
[12:27:22] [Server thread/INFO]: MEMEME joined the game
[12:27:23] [Client thread/INFO]: Loaded 204 advancements
[12:27:24] [Client thread/WARN]: Unable to play empty soundEvent: minecraft:entity.cod.ambient
[12:27:24] [Server thread/ERROR]: Encountered an unexpected exception
h: Ticking entity
	at net.minecraft.server.MinecraftServer.w(SourceFile:706) ~[18w11a.jar:?]
	at net.minecraft.server.MinecraftServer.v(SourceFile:627) ~[18w11a.jar:?]
	at czd.v(SourceFile:155) ~[18w11a.jar:?]
	at net.minecraft.server.MinecraftServer.run(SourceFile:532) [18w11a.jar:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.ClassCastException: afn cannot be cast to afj
	at adb.a(SourceFile:41) ~[18w11a.jar:?]
	at acz.a(SourceFile:22) ~[18w11a.jar:?]
	at adl.a(SourceFile:94) ~[18w11a.jar:?]
	at abw.cL(SourceFile:644) ~[18w11a.jar:?]
	at abv.l(SourceFile:1895) ~[18w11a.jar:?]
	at abw.l(SourceFile:504) ~[18w11a.jar:?]
	at ajs.l(SourceFile:33) ~[18w11a.jar:?]
	at aki.l(SourceFile:257) ~[18w11a.jar:?]
	at abv.S_(SourceFile:1750) ~[18w11a.jar:?]
	at abw.S_(SourceFile:284) ~[18w11a.jar:?]
	at ajs.S_(SourceFile:38) ~[18w11a.jar:?]
	at aki.S_(SourceFile:232) ~[18w11a.jar:?]
	at ajg.S_(SourceFile:252) ~[18w11a.jar:?]
	at aug.a(SourceFile:1617) ~[18w11a.jar:?]
	at se.a(SourceFile:705) ~[18w11a.jar:?]
	at aug.h(SourceFile:1593) ~[18w11a.jar:?]
	at aug.p_(SourceFile:1475) ~[18w11a.jar:?]
	at se.p_(SourceFile:538) ~[18w11a.jar:?]
	at net.minecraft.server.MinecraftServer.w(SourceFile:702) ~[18w11a.jar:?]
	... 4 more
[12:27:24] [Server thread/ERROR]: This crash report has been saved to: /home/~/.minecraft-beta/crash-reports/crash-2018-03-20_12.27.24-server.txt
[12:27:24] [Server thread/INFO]: Stopping server
[12:27:24] [Server thread/INFO]: Saving players
[12:27:24] [Server thread/INFO]: MEMEME lost connection: Disconnected
[12:27:24] [Server thread/INFO]: MEMEME left the game
[12:27:24] [Server thread/INFO]: Saving worlds
[12:27:24] [Server thread/INFO]: Saving chunks for level 'beta10'/overworld
---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 2018/03/20 12:27 PM
Description: Ticking entity

java.lang.ClassCastException: afn cannot be cast to afj
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at czd.v(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Thread.java:748)


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

-- Head --
Thread: Client thread
Stacktrace:
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)

-- Entity being ticked --
Details:
	Entity Type: minecraft:drowned (ajg)
	Entity ID: 132
	Entity Name: Drowned
	Entity's Exact location: 1497.20, 59.55, 830.86
	Entity's Block location: World: (1497,59,830), Chunk: (at 9,3,14 in 93,51; contains blocks 1488,0,816 to 1503,255,831), Region: (2,1; contains chunks 64,32 to 95,63, blocks 1024,0,512 to 1535,255,1023)
	Entity's Momentum: 0.00, 0.43, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)

-- Affected level --
Details:
	Level name: beta10
	All players: 1 total; [sg['MEMEME'/128, l='beta10', x=1501.62, y=60.68, z=829.02]]
	Chunk stats: ServerChunkCache: 1250 Drop: 0
	Level seed: -1392484337
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-16,64,66), Chunk: (at 0,4,2 in -1,4; contains blocks -16,0,64 to -1,255,79), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 278497 game time, 36115 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 18692 (now: true), thunder time: 63512 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at czd.v(SourceFile:155)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Thread.java:748)

-- System Details --
Details:
	Minecraft Version: 18w11a
	Operating System: Linux (amd64) version 4.4.0-116-generic
	Java Version: 1.8.0_151, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 174802872 bytes (166 MB) / 443535360 bytes (422 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 5 total; -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [sg['MEMEME'/128, l='beta10', x=1501.62, y=60.68, z=829.02]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
#@!@# Game crashed! Crash report saved to: #@!@# /home/~/.minecraft-beta/crash-reports/crash-2018-03-20_12.27.24-server.txt
AL lib: (EE) alc_cleanup: 1 device not closed

Luke Synnestvedt 2018-03-22T01:40:44Z

Uploading another crash. Hoping this gets fixed.

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 3/21/18 4:20 PM
Description: Ticking entity

java.lang.ClassCastException: afn cannot be cast to afj
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at rp.w(SourceFile:354)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Thread.java:748)


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

-- Head --
Thread: Server thread
Stacktrace:
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)

-- Entity being ticked --
Details:
	Entity Type: minecraft:drowned (ajg)
	Entity ID: 306595
	Entity Name: Drowned
	Entity's Exact location: 988.15, 59.52, 37.30
	Entity's Block location: World: (988,59,37), Chunk: (at 12,3,5 in 61,2; contains blocks 976,0,32 to 991,255,47), Region: (1,0; contains chunks 32,0 to 63,31, blocks 512,0,0 to 1023,255,511)
	Entity's Momentum: 0.00, -0.03, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)

-- Affected level --
Details:
	Level name: aqua1
	All players: 1 total; [sg['Stubbornmule'/288228, l='aqua1', x=990.45, y=11.00, z=129.17]]
	Chunk stats: ServerChunkCache: 713 Drop: 0
	Level seed: -9193889702175967349
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (232,64,68), Chunk: (at 8,4,4 in 14,4; contains blocks 224,0,64 to 239,255,79), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 1080016 game time, 1144429 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 58668 (now: false), thunder time: 76528 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at rp.w(SourceFile:354)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Thread.java:748)

-- System Details --
Details:
	Minecraft Version: 18w11a
	Operating System: Linux (amd64) version 4.9.0-6-amd64
	Java Version: 1.8.0_162, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 561331312 bytes (535 MB) / 1038024704 bytes (989 MB) up to 7265714176 bytes (6929 MB)
	JVM Flags: 2 total; -Xms1G -Xmx7G
	Profiler Position: N/A (disabled)
	Player Count: 1 / 20; [sg['Stubbornmule'/288228, l='aqua1', x=990.45, y=11.00, z=129.17]]
	Data Packs: vanilla
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 3/21/18 4:20 PM
Description: Ticking entity

java.lang.ClassCastException: afn cannot be cast to afj
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at rp.w(SourceFile:354)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Thread.java:748)


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

-- Head --
Thread: Server thread
Stacktrace:
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)

-- Entity being ticked --
Details:
	Entity Type: minecraft:drowned (ajg)
	Entity ID: 306595
	Entity Name: Drowned
	Entity's Exact location: 988.15, 59.52, 37.30
	Entity's Block location: World: (988,59,37), Chunk: (at 12,3,5 in 61,2; contains blocks 976,0,32 to 991,255,47), Region: (1,0; contains chunks 32,0 to 63,31, blocks 512,0,0 to 1023,255,511)
	Entity's Momentum: 0.00, -0.03, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)

-- Affected level --
Details:
	Level name: aqua1
	All players: 1 total; [sg['Stubbornmule'/288228, l='aqua1', x=990.45, y=11.00, z=129.17]]
	Chunk stats: ServerChunkCache: 713 Drop: 0
	Level seed: -9193889702175967349
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (232,64,68), Chunk: (at 8,4,4 in 14,4; contains blocks 224,0,64 to 239,255,79), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 1080016 game time, 1144429 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 58668 (now: false), thunder time: 76528 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at rp.w(SourceFile:354)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Thread.java:748)

-- System Details --
Details:
	Minecraft Version: 18w11a
	Operating System: Linux (amd64) version 4.9.0-6-amd64
	Java Version: 1.8.0_162, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 561331312 bytes (535 MB) / 1038024704 bytes (989 MB) up to 7265714176 bytes (6929 MB)
	JVM Flags: 2 total; -Xms1G -Xmx7G
	Profiler Position: N/A (disabled)
	Player Count: 1 / 20; [sg['Stubbornmule'/288228, l='aqua1', x=990.45, y=11.00, z=129.17]]
	Data Packs: vanilla
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)

Robin Gravel 2018-03-22T02:43:04Z

The game crashes too but i set "-Xmx2G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M", it works fine.

Drowneds seems to take too much memory the default game can handle.

Travis 2018-03-23T20:59:19Z

Confirming that editing the level.dat file to peaceful and reloading the map fixes the crash, until it occurs again for anyone trying to recover their save.

CWPlaysMC 2018-03-29T05:53:40Z

Just got this bug again while I was working on a zombie grinder. (Spaced out and tried to use a water elevator, forgetting that would turn the zombies into Drowned, so it's completely my fault.) This time, though, it seems to have corrupted my save. Not too fussed about it - I backed up my world a few hours ago, so not much harm done in this case - but it seems like this bug might be even more serious than I initially thought.

[media]

Benjamin McGillicudy 2018-04-02T07:47:47Z

I have had this bug occur today whilst going through a cave. I never even saw a drowned mob nearby, and I was at diamond level with no oceans nearby. Yet my crash report reveals the same thing as everyone else here- a Drowned mob.
My world seemed to be corrupt... But I made a few copies in the saves folder, and kept trying to open them. Eventually I got back into my world, ran away from the effected area, and then happened to crash again minutes after.
I have reloaded a world that is now working, but I am not moving until this is fixed! Or, perhaps I should play on peaceful for now...

The weird and important thing to note is that I have created a drowned mob grinder from a zombie spawner far away from where I crashed in this world... And I spent a good hour or so converting zombies to drowned and killing them without a crash happening!
Perhaps... As I think the crash report is suggesting... This has something to do with them swimming, as my farm did not allow them to 'swim around'.

DaMaloma 2018-04-03T10:39:16Z

I have 74 crash reports from my server with this crash. We have tried to figure out how to consistently reproduce the bug without success. It seems completely random but happens more on multiplayer than in single player even with only one player online on the multiplayer server. Trying to trigger it on newly created small single player worlds on good computers might prove almost impossible. If you need world download of our multiplayer server or any more crash reports or info about which steps we've taken to try to figure this out I'd be happy to help.

Brian Tate 2018-04-04T02:20:00Z

Hi Team,

I have had this occur now twice, in two different worlds both in survival mode. One I created and have played many snapshots on and the other was a demo world I created long ago that I decided to start playing when the other became corrupted. Due to this specific bug along with performance issues with this release, I will likely choose to wait until GA as this is simply unacceptable that this is still open in JIRA and hasn't moved at all. I'm including two log files from each instance for static testing. Each are on the same test host with no changes from baseline. While not exactly a bug, I may need to file one as performance on macOS 10.12.6 has really been impacted with the additions added in this update. In fact, I had to totally disable any 32 or 64 resource pack and even the low end shaders as well. What is strange is that the FPS in vanilla was still the same but performance seems to be related to large chunks that appear to be attempting to render but do not. This is on macOS 10.12.6, (any beta snapshot so far, including 18w11a), Core i7 2.3Ghz, 16GB DDR3, Intel HD4000. Frankly, my Lenovo Ultrabook does not far much better with Windows 10 1701.

This bug is really difficult to address if anyone expects some serious bug testing from crowdsourcing QA. We have to be able to play the snapshots to report the bugs. We cannot do that at the moment once this is encountered. On a final note, I was at MineCon Earth with my son at Microsoft and I find it disconcerting that these issues still persist and GA should be already a confirmed date. Please address these performance issues and review the logs to address this bizarre bug. Thank you.

[media][media]

[Mod] Neko 2018-04-04T03:10:31Z

There's no need to keep adding crash reports to this ticket. Thank you.

Supernova792 2018-04-04T17:51:29Z

Confirmed with 18W14A

AceMcCrank 2019-03-28T20:00:19Z

This bug is back with 19w13a or is related to this one

For me this happened after I put some villagers in boats, and an outside villager started to want to breed with one in the boat. The boat caused the ticking error.

I tried destroying the boats, but then the villagers started to also create the ticking error.

[Mod] Neko 2019-03-28T23:56:46Z

@unknown: Your issue is MC-146783.