Java Edition 25w09a

Minecraft 25w09a

Edition	Java Edition
Release date	February 26, 2025
Type	Snapshot
Snapshot for	1.21.5
Protocol version	dec: 1073742060  hex: 400000EC
Data version	4317
Resource pack format	53
Data pack format	69
Minimum Java version	Java SE 21
◄◄  1.21.4 1.21.5 ◄  25w08a 25w09a

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25w09a is the eighth snapshot for Java Edition 1.21.5, released on February 26, 2025.

Additions

World generation

Fallen tree

• Fallen trees are a new decorative variant of trees.
• Fallen trees come in four different wood type variants:
  • Oak
  • Birch
  • Jungle
  • Spruce
• Birch fallen trees can come in a shorter version or a longer version.
• Some fallen trees can be decorated with mushroom or vines.
• Fallen trees can be found in all biomes where their standing tree variant grow, except the following:
  • Meadow
  • Bamboo Jungle
  • River
  • Grove
  • Flower Forest
    • Has fallen birch trees but not fallen oak trees.

Changes

Blocks

Leaf litter

• Leaf Litter is now replaceable by other blocks.

Creaking heart

• The creaking heart now has a new third condition, "dormant", which it assumes when placed in the right alignment between two pale oak blocks and the daytime is night.

Firefly Bush

• The Firefly Bush can now generate near water in Mangrove Swamps and Badlands (very rarely), like other biomes with water.

Command format

/data

• Can now create and modify heterogeneous lists transparently.

General

Block entity format

• campfire
  • The CookingTimes and CookingTotalTimes fields will no longer be preserved when removed.
• chiseled_bookshelf
  • The last_interacted_slot field now defaults to -1 if not specified.
• hopper
  • The TransferCooldown field now default to -1 if not specified.
• jigsaw
  • The name, target, and pool fields now default to minecraft:empty if not specified.
  • The final_state field now defaults to minecraft:air if not specified.
• sculk_shrieker
  • The warning_level field now defaults to 0 if not specified.
• structure_block
  • The ignoreEntities and showboundingbox fields now default to true if not specified.
  • The posY field now defaults to 1 if not specified.

Data pack

• The pack format version is now 69.

Entity format

• The FallFlying field will no longer be preserved if removed.
  • The Health and Air fields now default to their respective maximum value if not specified.
• area_effect_cloud
  • The Duration field now defaults to -1 if not specified.
  • If the Duration field is -1, the Area Effect Cloud will never run out.
  • This means that an Area Effect Cloud summoned with no duration specified will no longer immediately disappear.
• creeper
  • The Fuse field now defaults to 30 if not specified.
  • The ExplosionRadius field now defaults to 3 if not specified.
• dolphin
  • The Moistness field now defaults to 2400 if not specified.
• ender_dragon
  • The DragonDeathTime field now defaults to 0 if not specified.
• falling_block
  • The BlockState field can now be air (will despawn immediately) - if otherwise not specified or invalid, defaults to sand.
  • The HurtEntities field now defaults to false if not specified (or true if BlockState is anvil).
  • The FallHurtAmount field now defaults to 0 if not specified.
  • The FallHurtMax field now defaults to 40 if not specified.
  • The DropItem field now defaults to true if not specified.
  • The TileEntityData field will no longer be preserved if removed.
• firework_rocket
  • The ShotAtAngle field now defaults to false if not specified.
• fox
  • The Trusted field now defaults to empty if not specified (and will no longer be merged with the previous state if modified by /data).
• ghast
  • The ExplosionPower field now defaults to 1 if not specified.
• goat
  • The HasLeftHorn and HasRightHorn fields now default to true if not specified.
• interaction
  • The width and height fields now default to 1 if not specified.
• item
  • The Health field now defaults to 5 if not specified.
  • The PickupDelay field now defaults to 0 if not specified.
  • The Age field now defaults to 0 if not specified.
  • The Owner and Thrower fields will no longer be preserved when removed.
• item_frame and glow_item_frame
  • The ItemDropChance field now defaults to 1.0 if not specified
• primed_tnt
  • The fuse field now defaults to 80 if not specified.
  • The explosion_power field now defaults to 4 if not specified.
• shulker
  • The Color field now defaults to 16 (no color) if not specified.
• skeleton
  • The StrayConversionTime field will no longer be preserved when removed.
• spectral_arrow
  • The Duration field now defaults to 200 if not specified.
• snow_golem
  • The Pumpkin field now defaults to true if not specified.
• tnt_minecart
  • The fuse field now defaults to 80 if not specified.
  • The explosion_power field now defaults to 4 if not specified.
  • The explosion_speed_factor field now defaults to 1 if not specified.
• trader_llama
  • The DespawnDelay field now defaults to 47999.
• villager
  • The FoodLevel and Xp fields now default to 0 if not specified.
  • The ConversionTime field will no longer be preserved when removed.
• wandering_trader
  • The DespawnDelay field now defaults to 0 if not specified.
• zombie
  • The DrownedConversionTime field will no longer be preserved when removed.
• zombie_villager
  • The Xp field now defaults to 0 if not specified.
  • The ConversionTime field will no longer be preserved when removed.
• arrow, spectral_arrow, trident
  • The damage field now defaults to 2 if not specified.
• dragon_fireball, wind_charge, breeze_wind_charge, wither_skull, small_fireball, and large_fireball
  • The acceleration_power field now defaults to 0.1 if not specified.
• small_fireball and large_fireball
  • The ExplosionPower field now defaults to 1 if not specified.
• block_display, item_display, and text_display
  • The interpolation_duration, teleport_duration, and start_interpolation fields now default to 0 if not specified.
  • The view_range field now defaults to 1 if not specified.
  • The shadow_radius field now defaults to 0 if not specified.
  • The shadow_strength field now defaults to 1 if not specified.
  • The width and height fields now default to 0 if not specified.

Fixes

19 issues fixed

From released versions before 1.21.5

• MC-168262 – Dead bushes cannot be placed on farmland.
• MC-236100 – End crystal beam appears to be black.
• MC-276861 – The player can sometimes teleport through blocked end portals when moving very fast.

From the 1.21.5 development versions

• MC-279229 – SNBT text components prevent \n and \t from working.
• MC-279236 – Flying into water with an elytra puts the player into an erroneous state.
• MC-279250 – SNBT text components prevent unicode escapes from working.
• MC-279252 – Changing a single line of a sign with /data is no longer possible in some situations.
• MC-279278 – Strafing twice in rapid succession while walking forward causes player to sprint.
• MC-279928 – Beacon beam clips into beacon block when far enough away.
• MC-279932 – Beacon beam disappears and reappears when approaching it.
• MC-279942 – Beacon beam can render over fog when outside render distance.
• MC-279947 – Snout of the new cow model is offset vertically by 0.1 pixels.
• MC-280022 – Players can be lit by lava while stepping onto solid blocks next to it.
• MC-280033 – Beacon beams render beyond client render distance.
• MC-280121 – Leaf litter can be placed on walls and fences.
• MC-280123 – Short dry grass and tall dry grass aren't randomly offset, unlike similar blocks.
• MC-280155 – Random ticks can cause entity build-up in lazy chunks.
• MC-280170 – Goats can no longer ram armor stands unless the game rule mobGriefing is set to false.
• MC-280211 – End crystal beams cause OpenGL errors with glDebugVerbosity set to 3.