Java Edition 24w19a

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 "title": "Minecraft 24w19a",
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 "label": "(link to Edition article, displayed as Edition)"
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 "field": "May 10, 2024",
 "label": "Release date"
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 {
 "field": "(link to Snapshot article, displayed as Snapshot)",
 "label": "(link to Version types article, displayed as Type)"
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 {
 "field": "(link to Java Edition 1.21 article, displayed as 1.21)",
 "label": "Snapshot for"
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 "field": "[https://piston-data.mojang.com/v1/objects/ec4ab4da55435693e7342cfe6d23ab0df9226eb7/client.jar Client] ([https://piston-meta.mojang.com/v1/packages/efc6555115de2c4249a3e7285cf1034a99d418ba/24w19a.json .json])<br />[https://piston-data.mojang.com/v1/objects/8088cca48fece804d29b368ab5bbcc27a540456c/server.jar Server]",
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 "label": "(link to Obfuscation map article, displayed as Obfuscation maps)"
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 "field": " <span style=\"font-size:smaller\"><abbr title=\"decimal\">dec</abbr>: </span>1073742018<br /> <span style=\"font-size:smaller\"><abbr title=\"hexadecimal\">hex</abbr>: </span>400000C2",
 "label": "(link to Protocol version article, displayed as Protocol version)"
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 "field": "33",
 "label": "<span style=\"white-space: normal;\">(link to Pack format#List of pack formats article, displayed as Resource pack format)</span>"
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 "field": "43",
 "label": "<span style=\"white-space: normal;\">(link to Pack format#List of pack formats article, displayed as Data pack format)</span>"
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 "field": "<span class=\"plainlinks\">[https://en.wikipedia.org/wiki/Java_version_history#Java_SE_21_.28LTS.29 Java SE 21]</span>",
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 "footer": "<table style=\"margin: auto; word-break: break-word;\">\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\" >[[Java Edition 1.20.6|<span style=\"margin-right:-0.35em\">◄</span>◄  1.20.6]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 1.21|1.21]]'''</td>\n<td style=\"padding: 0.4em\" >[[Java Edition 1.21.1| 1.21.1 <span style=\"margin-right:-0.35em\">►</span>►]]</td>\n</tr>\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\">\n[[Java Edition 24w18a|◄  24w18a]]\n</td>\n<td style=\"padding: 0.4em\">''' 24w19a'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 24w19b| 24w19b ►]]\n</td>\n</tr>\n</table>"
}

24w19a is the second snapshot for Java Edition 1.21, released on May 10, 2024,^[1] which optimizes chunk loading performance, and fixes bugs.

Sounds

• Added 4 new cave ambient sounds:

Copper bulb

• Replaced the sounds for "turn off" and "turn on" with one "toggle" sound.

Sculk sensor and calibrated sculk sensor

• Added frosted ice being placed by Frost Walker to the list of events that produce a "Block Placed" vibration (frequency 13).​^{[more information needed]}

👁 Image
Trial spawner

• Updated the top face texture and the active state texture.

Mace

• Fire Aspect can be applied to maces again.

Enchantments

• Breach and Density are now incompatible.

Data pack

• The pack format version is now 43.
• Registry decorated_pot_patterns has been renamed to decorated_pot_pattern.
• Renamed directories; each directory that used the plural name of its element now matches registry name:

Data component format

• The custom_data component can now be specified as an SNBT string to preserve type information in JSON.
  • This is the same as is used in the set_custom_data loot function and custom_data predicate.
• The food item component has new fields:
  • using_converts_to: item with components (optional).
    • Once consumed, the food item is replaced with the specified item.
    • e.g. food={nutrition:1,saturation:0,using_converts_to:{id:"poisonous_potato",components:{"minecraft:custom_name":'"Wait what?"'}}}.

Entity format

• Removed power tag and replaced with acceleration_power tag with a number value that control the projectile's acceleration (and maximum speed).
  • This change affects the following projectiles; dragon_fireball, large_fireball, small_fireball, fireball, breeze_wind_charge, wind_charge, wither_skull.

Custom structure

• New tag dimension_padding for structures.
  • Ensures that a structure is not generating through the edges of a dimension by adding vertical padding to its bounding box.
  • Default is 0.
  • Trial chambers have a padding of 10 since they are generated deep underground and would sometimes intersect with bedrock layer.

Entity effect types

• Adds optional field trigger_game_event for effect types replace_block, replace_disc and set_block_properties.
  • Game event ID for a game event to trigger when a block has been replaced.

Tags

• Added fire_aspect_lightable to each block that should be possible to light by hitting it with a tool that has Fire Aspect.

Damage type predicate

• New option: is_direct - optional boolean.
  • When present, true requires the damage to be direct and false requires the damage to be indirect.
  • Damage is direct when its direct and source entities are the same.

Performance

• When reading an already generated chunk from disk, surrounding chunks are no longer unnecessarily loaded, reducing memory and CPU overhead.

75 issues fixed

From released versions before 1.21

• MC-9568 – Mobs suffocate/go through blocks when growing up near a solid block.
• MC-9644 – Launched falling_block entities do not travel through portals.
• MC-14923 – Players can be kicked for spamming in a Singleplayer world with cheats disabled.
• MC-16345 – Reducing the player's base max health using /attribute does not always reduce their current health.
• MC-26304 – Brewing stands reset brew cycle when unloaded.
• MC-93833 – Only if Health is provided, maxHealth attribute is used as maximum Health value.
• MC-96198 – Boats/rafts move into blocks when landing in less than one block deep water.
• MC-110815 – Slimes are summoned with the wrong amount of health.
• MC-175619 – Dispenser drops honey bottle unless empty slot is available.
• MC-178383 – Horses, donkeys, mules and llamas spawned from spawn eggs or /summon command have 53 health.
• MC-195931 – Incorrect amount of damage heart particles shown when hitting some entities for the first time.
• MC-252846 – Mobs can pass through fences with carpets on top when growing up.
• MC-253791 – Frogs suffocate when growing.
• MC-254004 – Falling block entities do not process their end gateway cooldown timer.
• MC-267947 – Ender pearls can teleport players in Spectator mode.
• MC-267951 – The game freezes and eventually crashes when creating a world with the "spawnChunkRadius" gamerule set to high values.
• MC-267968 – Medium slimes from trial chamber spawners take damage incorrectly when first hit.
• MC-267981 – The "Trial Spawner crackles" subtitle is only displayed for a split second upon the "minecraft:block.trial_spawner.ambient" sound being played.
• MC-268106 – Entities' current health is not capped at their max health in all applicable situations.
• MC-268772 – Fall damage multiplier attribute has unintuitive coloring.
• MC-269318 – Books placed on a lectern in Creative mode are consumed.
• MC-269601 – Mace smash attack does not knock back other players when they are not the attacked entity.
• MC-269633 – Placing an oversized filled bucket resets the stack size to 1.
• MC-269642 – Eating an oversized soup/stew resets the stack size to 1.
• MC-269674 – Oversized book and quill stacks reset count when signed.
• MC-269685 – Buckets are lost when consuming oversized milk buckets.
• MC-269686 – Oversized music disc stacks can be duplicated with jukeboxes.
• MC-269708 – Dispensers using an oversized stack of water bottles resets the stack size to 1.
• MC-269717 – Cauldron deletes overstacked tinted shulker boxes.
• MC-269809 – Feeding an axolotl an oversized tropical fish bucket resets the stack size to 1.
• MC-270296 – Ominous item spawner spawns unstackable arrows with potion effects.
• MC-270584 – Vault/ominous vault loot isn't predetermined, allowing players to create backups of their worlds to get desired rewards.
• MC-270635 – Trial spawner textures are inconsistent.
• MC-270684 – set_attributes loot function doesn't accept an empty list.
• MC-270779 – Getting data with /data command from a block/chest with a large amount of data can cause the game to crash.
• MC-270818 – Data generator items report is not deterministic.
• MC-270926 – "foodSaturationLevel" can be negative.
• MC-270965 – The data type of the "minecraft:custom_data" component of the recipe result will be forcibly modified.
• MC-270988 – Iron golem and snow golem spawn eggs from before 1.13 do not upgrade to 1.20.5 correctly
• MC-271001 – Items in a container can be given a count above 99 (to max integer), and can crash the world.
• MC-271005 – Knowledge books with a max stack size over 1 consume all items in the stack when used.
• MC-271026 – Components that set a status effect sometimes lose parts of the data.
• MC-271094 – Entity ID inside EntityTag is ignored when updating a world to 1.20.5.
• MC-271159 – Banner pattern entries without colors are invalidated when upgrading to 1.20.5.
• MC-271170 – Unexpected error when modifying skull's custom name to an invalid value.

From the previous development version

• MC-271398 – Crafting ingredients remain in the grid after crafting certain items, causing item duplication.
• MC-271400 – The Quick Charge enchantment on crossbows no longer increases the crossbow loading speed.
• MC-271402 – Sharpness and mob-specific damage enchantments reduce attack damage instead of increasing it.
• MC-271404 – Breach and Density enchantments aren't mutually exclusive.
• MC-271406 – Blocks reappear when mined instantly.
• MC-271422 – Soul Speed causes your FOV to change whenever you jump.
• MC-271423 – Riptide enchantment does not work properly.
• MC-271427 – Sweep attacks no longer trigger consistently.
• MC-271434 – Campfires knockback the player.
• MC-271435 – Moving while being attacked no longer deals knockback correctly.
• MC-271436 – Mace can no longer be enchanted with Fire Aspect.
• MC-271441 – Fire Protection tooltip is displayed in red text despite being a positive effect.
• MC-271442 – The Fire Aspect enchantment can change the "lit" states of redstone lamps, redstone torches, copper bulbs, furnaces, smokers, and blast furnaces.
• MC-271444 – The Fire Aspect enchantment can turn on campfires and candles while underwater.
• MC-271449 – Player momentum no longer affects ender pearls, eggs, or snowballs.
• MC-271455 – When holding a Fire Aspect weapon in the mainhand, thrown tridents in the offhand will set mobs on fire.
• MC-271459 – Frost Walker deletes waterlogged blocks.
• MC-271461 – Interacting with certain villagers with the villager trade rebalance enabled causes client crash.
• MC-271477 – "projectile_spawned" enchantment effect always activates at 0, 0, 0.
• MC-271484 – Lighting candles and campfires with Fire Aspect doesn't sent vibration to sculk sensors.
• MC-271556 – The drop rate of wither skeleton skulls is lowered by 0.01.
• MC-271562 – "projectile_spawned" enchantment component triggers the enchantment effects before setting the projectile's default NBT.
• MC-271565 – The game can crash when upgrading worlds with zombie villagers from before 1.9.
• MC-271632 – Weapon with Bane of Arthropods can only give the target Slowness I instead of Slowness IV.
• MC-271637 – The enchantment entity effect type "run_command" always runs the command in the overworld.
• MC-271652 – Holding items enchanted with Thorns in your hand no longer works as if you were wearing them.
• MC-271654 – Enchantments granting bonus damage to melee weapons aren't producing particles.
• MC-271710 – Key Binds background is darker than the rest of UI.
• MC-271725 – Enchantment entity effect "apply_mob_effect" never applies an amplifier even if one is defined.
• MC-271726 – The item.trident.thunder sound can no longer be heard by the player who was struck by a lightning.