Luke Synnestvedt

For everyone repeatedly commenting, please remember that comments are meant to be used for constructive additions which aid in developers understanding and resolving the issue. This is not a place to vent frustration or repeat evidence which has already been gathered or stated.

The devs are aware that this issue persists, they have stated that it is a very low priority as it does not impact stable versions of the game, and will likely not invest time to fix the issue. We took the risk when we started a world within a snapshot version.

For all the players on here, it's not our place to impose our remediation beliefs on Mojang. We find bugs, they fix them. You can analyze causes of them, but postulating about how Mojang SHOULD fix something is for Reddit, not JIRA.

Additionally, Kumasasa is right. All 1.12 worlds will be fine upon updating to these snapshots - we accepted the risk that any potential worlds would be broken along the way when we started playing on snapshots. Comments about how Mojang must fix this are misplaced on these threads.

Adding sea grass/kelp WARNs that my server threw when trying to load chucks with airpockets.

Console Log:

[17:23:59] [Server thread/WARN]: Invalid statistic in ./aqua1/stats/1330124a-9e25-4a90-8b5d-7f3001d66aec.json: Don't know what minecraft:kelp_top is 
 [17:23:59] [Server thread/WARN]: Invalid statistic in ./aqua1/stats/1330124a-9e25-4a90-8b5d-7f3001d66aec.json: Don't know what minecraft:puffer_fish is 
 [17:23:59] [Server thread/WARN]: Invalid statistic in ./aqua1/stats/1330124a-9e25-4a90-8b5d-7f3001d66aec.json: Don't know what minecraft:salmon_mob is 
 [17:23:59] [Server thread/WARN]: Invalid statistic in ./aqua1/stats/1330124a-9e25-4a90-8b5d-7f3001d66aec.json: Don't know what minecraft:cod_mob is 
 [17:23:59] [Server thread/WARN]: Invalid statistic in ./aqua1/stats/1330124a-9e25-4a90-8b5d-7f3001d66aec.json: Don't know what minecraft:sea_grass is 
 [17:23:59] [Server thread/WARN]: Invalid statistic in ./aqua1/stats/1330124a-9e25-4a90-8b5d-7f3001d66aec.json: Don't know what minecraft:kelp_top is 
 [17:23:59] [Server thread/WARN]: Invalid statistic in ./aqua1/stats/1330124a-9e25-4a90-8b5d-7f3001d66aec.json: Don't know what minecraft:sea_grass is

Edit: Cold Deep Ocean biome

Screenshots:

Mod FVbico, in editing the description, I fear that you may have removed some failed structure loads related to kelp and sea grass (which the screenshots portray). Your tickets, so you make the rules, just wanna make sure it's tracked somewhere 😉

Edit: I see that they were server WARNs and not ERRORs like the failed structure loading.

Edit 2: Attached WARNs to ticket referenced above.

@Matis Wardenier do you have your console logs? Want to compare with the errors mine had.

Additionally, did any of your chunks fail to save?

Screenshots portray issue from MC-129625. May be duplicate, but need to see the server logs from the other ticket's console.

Crashed as soon as I attempted to load our previous 18w16a world onto the updated server. Any progress on causes or fixes?

Whoops - I discovered this bug roughly 5 hours ago and there wasn't a ticket then. By the time I actually had a moment to export my log from the cloud, looks like duplicates came up. Have no fear, I searched, just not right before I pushed post 😉

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)