[MC-1788] Ocelots do not spawn naturally on peaceful difficulty in jungle and bamboo jungle biomes

The bug

Despite being friendly mobs, ocelots will not spawn on peaceful in jungle or bamboo jungle biomes

Code Analysis

The reason this happens is because for the mob cap in jungle and bamboo jungle biomes they are counted as monsters instead of creatures

Current Code

net/minecraft/data/worldgen/biome/OverworldBiomes.java

public static Biome jungle() {
      MobSpawnSettings.Builder mobspawnsettings$builder = new MobSpawnSettings.Builder();
      BiomeDefaultFeatures.baseJungleSpawns(mobspawnsettings$builder);
      mobspawnsettings$builder.addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PARROT, 40, 1, 2)).addSpawn(MobCategory.MONSTER, new MobSpawnSettings.SpawnerData(EntityType.OCELOT, 2, 1, 3)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PANDA, 1, 1, 2));
      return baseJungle(0.9F, false, false, true, mobspawnsettings$builder);
   }

   public static Biome bambooJungle() {
      MobSpawnSettings.Builder mobspawnsettings$builder = new MobSpawnSettings.Builder();
      BiomeDefaultFeatures.baseJungleSpawns(mobspawnsettings$builder);
      mobspawnsettings$builder.addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PARROT, 40, 1, 2)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PANDA, 80, 1, 2)).addSpawn(MobCategory.MONSTER, new MobSpawnSettings.SpawnerData(EntityType.OCELOT, 2, 1, 1));
      return baseJungle(0.9F, true, false, true, mobspawnsettings$builder);
   }

public static Biome jungle() {
      MobSpawnSettings.Builder mobspawnsettings$builder = new MobSpawnSettings.Builder();
      BiomeDefaultFeatures.baseJungleSpawns(mobspawnsettings$builder);
      mobspawnsettings$builder.addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PARROT, 40, 1, 2)).addSpawn(MobCategory.MONSTER, new MobSpawnSettings.SpawnerData(EntityType.OCELOT, 2, 1, 3)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PANDA, 1, 1, 2));
      return baseJungle(0.9F, false, false, true, mobspawnsettings$builder);
   }

   public static Biome bambooJungle() {
      MobSpawnSettings.Builder mobspawnsettings$builder = new MobSpawnSettings.Builder();
      BiomeDefaultFeatures.baseJungleSpawns(mobspawnsettings$builder);
      mobspawnsettings$builder.addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PARROT, 40, 1, 2)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PANDA, 80, 1, 2)).addSpawn(MobCategory.MONSTER, new MobSpawnSettings.SpawnerData(EntityType.OCELOT, 2, 1, 1));
      return baseJungle(0.9F, true, false, true, mobspawnsettings$builder);
   }

Fixed Code

net/minecraft/data/worldgen/biome/OverworldBiomes.java

public static Biome jungle() {
      MobSpawnSettings.Builder mobspawnsettings$builder = new MobSpawnSettings.Builder();
      BiomeDefaultFeatures.baseJungleSpawns(mobspawnsettings$builder);
      //Setting the MobCategory to Creature for Ocelot fixes MC-1788
      mobspawnsettings$builder.addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PARROT, 40, 1, 2)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.OCELOT, 2, 1, 3)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PANDA, 1, 1, 2));
      return baseJungle(0.9F, false, false, true, mobspawnsettings$builder);
   }

   public static Biome bambooJungle() {
      MobSpawnSettings.Builder mobspawnsettings$builder = new MobSpawnSettings.Builder();
      BiomeDefaultFeatures.baseJungleSpawns(mobspawnsettings$builder);
      //Setting the MobCategory to Creature for Ocelot fixes MC-1788
      mobspawnsettings$builder.addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PARROT, 40, 1, 2)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PANDA, 80, 1, 2)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.OCELOT, 2, 1, 1));
      return baseJungle(0.9F, true, false, true, mobspawnsettings$builder);
   }

public static Biome jungle() {
      MobSpawnSettings.Builder mobspawnsettings$builder = new MobSpawnSettings.Builder();
      BiomeDefaultFeatures.baseJungleSpawns(mobspawnsettings$builder);
      //Setting the MobCategory to Creature for Ocelot fixes MC-1788
      mobspawnsettings$builder.addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PARROT, 40, 1, 2)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.OCELOT, 2, 1, 3)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PANDA, 1, 1, 2));
      return baseJungle(0.9F, false, false, true, mobspawnsettings$builder);
   }

   public static Biome bambooJungle() {
      MobSpawnSettings.Builder mobspawnsettings$builder = new MobSpawnSettings.Builder();
      BiomeDefaultFeatures.baseJungleSpawns(mobspawnsettings$builder);
      //Setting the MobCategory to Creature for Ocelot fixes MC-1788
      mobspawnsettings$builder.addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PARROT, 40, 1, 2)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.PANDA, 80, 1, 2)).addSpawn(MobCategory.CREATURE, new MobSpawnSettings.SpawnerData(EntityType.OCELOT, 2, 1, 1));
      return baseJungle(0.9F, true, false, true, mobspawnsettings$builder);
   }

Linked issues

is duplicated by 5

MC-194320 Ocelot spawns Resolved

MC-104824 Ocelots dissapearing after changing difficulty Resolved

MC-16357 Ocelots spawn using the hostile mob spawner Resolved

MC-19742 Peaceful doesn't work with ocelots? Resolved

MC-67851 hostle kitty! Resolved

Comments 39

Brandon Bourgeois 2012-11-05T16:47:23Z

Were you in the jungle, which is the only biome they naturally spawn in?

Alisha J. 2012-11-05T16:48:43Z

Yes of course.

Alexander Hammett 2012-11-05T16:53:20Z

Yes, annoyed me from the very beginning 😞

Alisha J. 2012-11-05T16:57:05Z

^ Hi five! 😉 That also annoys me, that's why I brought it up here.
If You could please just vote it up, so it's more likely it'll get noticed…

Alexander Hammett 2012-11-05T18:36:58Z

Here, have an upvote 😉

29 more comments

Alisha J. 2012-11-07T21:04:37Z

Thank You!! 😊

kumasasa 2013-02-04T22:43:30Z

Confirmed but unknown if intended.
Ocelots are considered as "Monster" for the game, so that they don't spawn in peaceful.

Alisha J. 2013-02-05T07:24:11Z

What about wolves though? They can even attack You, but they still spawn on the easiest difficulty.

Tails 2013-02-17T19:52:04Z

Intended, source: http://www.minecraftwiki.net/wiki/Issues/Weekly_12w04a#Bugs_7

Alisha J. 2013-02-17T21:12:54Z

It's only they despawn because they were created using a HOSTILE monster spawner - they are not hostile, are they?
Please think it though, give it a chance 😞

Tails 2013-02-17T21:14:53Z

[N] = This is not a bug. (It is intended behaviour and will not be changed)

[N] = This is not a bug. (It is intended behaviour and will not be changed)

For feature suggestions/changes please use the MineCraft Forums: Suggestions.

Alisha J. 2013-02-17T21:18:20Z

>__< That means they'll never look at it.

Jonathan Haas 2013-05-20T15:31:53Z

It may be intentional that mobs spawned with the hostile mob spawner do despawn and don't spawn in peaceful difficulty.

Still, ocelots are not hostile so it makes no sense for them to spawn using the hostile mob spawner. This makes it impossible to get cats on peaceful maps or on servers with hostile mobs disabled, which is just stupid. Please think about this again.

Alisha J. 2013-05-20T16:18:22Z

^ Exactly!
I still do not believe it works as intended as well.

Austin 2014-07-05T01:22:12Z

yea honestly, ocelots are not hostile in any way shape or form, they are completely neutral even when tamed. so why not make em spawn on peaceful? wolves do, and they are hostile when aggravated. why spawn them with a mob spawner? make it the same spawn thing as wolves.

KingSupernova 2015-01-09T05:05:07Z

Is this bug that ocelots don't spawn naturally, or that they don't spawn from mob spawners? The description seems to be talking about natural spawning, but several of the comments are referring to mob spawners.

KingSupernova 2015-02-12T04:25:23Z

Could someone clarify the bug going on here? Is it natural spawning, or mob spawners?

Jonathan Haas 2015-02-12T08:48:40Z

Both, probably. But the main issue is that they don't spawn naturally in the jungle on peaceful difficulty. Which makes cats completely unavailable when playing on peaceful without cheats.

W_V 2020-09-28T05:18:08Z

I think the category of this should be "Mob Spawning"

Will Demetrius Yoward 2020-11-06T16:52:48Z

Ocelots are underneath the monster spawns category in the biome file for jungles. To fix this bug, all they need to do is move it to the passive spawns like every other animal is in. I ran some tests with custom biomes, and Peaceful mode stops any mobs from spawning that are inside the monster spawns category, even if they aren't a monster at all.

Avoma 2021-01-08T14:22:22Z

Can confirm in 20w51a.

Avoma 2021-01-29T20:12:49Z

Can confirm in 21w03a.

Avoma 2021-02-05T17:08:48Z

Can confirm in 21w05b.

Avoma 2021-03-18T09:53:41Z

Can confirm in 21w11a.

user-c84db 2021-03-18T09:55:13Z

Relates to MC-186131.

Boas Bakker 2021-08-29T16:27:59Z

The actual bug is that they are in the hostile mob cap, so if you for example have 70 shulkers loaded in singleplayer and you go to a jungle no ocelots will spawn. Solution is to let them be part of passive mob cap, and follow the rules of passive mob spawning

Ceresjanin123 2021-10-09T08:39:40Z

Can confirm in 21w40a