Java Edition 21w19a

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21w19a is the twenty-first snapshot for Java Edition 1.17, released on May 12, 2021,^[1] which increases the minimum Java version to 16, removes unfinished features (bundles, candles and sculk sensors), and fixes bugs.

Tags

• Added mineable/axe, mineable/hoe, mineable/pickaxe, and mineable/shovel block tags.
  • Blocks with these tags can be destroyed more quickly with the matching tool.
• Added needs_stone_tool, needs_iron_tool, and needs_diamond_tool block tags.
  • If a block requires the correct tool to drop, these tags determine which tier of that tool is required.

Anvils

• The maximum length a name of an item can have after being renamed has been increased from 35 characters to 50 characters.

Candle cakes

• Renamed from "[Color] Candle Cake" to "Cake with [Color] Candle".

Bee

• Can now pollinate cave vines.

Squid and glow squid

• Leads now work with them again.

Hanging roots

• Changed the way the item model is displayed in the player's right hand.
• Are now twice as big when dropped as an item entity.

/item

• New syntax:
  • /item replace <target> with <item stack> [<count>]
    • Same as old version of the command.
  • /item replace <target> from <source> [<modifier>]
    • Copies item for source to target(s), optionally applying modifier.
  • /item modify <target> <modifier>
    • Modifies item (without copying).

Creative inventory

• Removed sculk sensors, bundles, and candles.
  • These items can still be accessed through commands.

Recipes

• Removed recipes for bundles and candles.
• Grouped the recipes for crafting copper ingots from a block of copper with other recipes for copper ingots.

Splashes

• Changed the splash "Now Java 8!" to "Now Java 16!"

Tags

• Added cave vines to the bee_growables block tag.
• Removed moss blocks from the lush_ground_replaceable block tag.
• Added azaleas and flowering azaleas to the saplings block and item tags.

Technical

• Java requirement changed from version 8 to version 16.

Changes have been made to the official Caves & Cliffs world generation preview data pack, which gives early access to the world generation coming in Java Edition 1.18.

Recipes

• Unhid the recipe to craft bundles and candles.

42 issues fixed

From released versions before 1.17

• MC-101244 – Can't scan for LAN worlds on macOS.
• MC-105080 – Ender Dragon is respawned if all Exit End Portal blocks are removed / legacy scanning is done for worlds with new dragon fight.
• MC-136647 – Leads don't work with Squids.
• MC-165924 – Snow particles render darker / almost transparent if the block light level is 7 or more.
• MC-200009 – Crash when using a non-mushroom block in a huge mushroom feature's cap.
• MC-225815 – A spawner has been replaced from a block of Stone.

From the 1.17 development versions

• MC-203606 – "X Candle Cake" should be "Cake with X Candle".
• MC-203718 – Lightning rod stays activated when struck by lighting at the same time as being moved by a piston.
• MC-203757 – Anvil character limit is too low for items with long names.
• MC-204244 – Sheep are rendered like white sheared sheep through tinted glass blocks.
• MC-205268 – Sideways lightning rods don't power redstone dust.
• MC-205626 – The command syntax order of /item is inconsistent.
• MC-208663 – Pufferfish don't defend themselves from axolotls.
• MC-208740 – Withers attack axolotls that are playing dead.
• MC-209533 – Amethyst shard is not grouped with other gemstones in the Creative inventory.
• MC-212206 – Shulkers generating outside the world border bug out when trying to spawn.
• MC-213774 – Hanging roots float in your hand.
• MC-213922 – Shulkers are not spawned in the correct place.
• MC-213943 – Flying slightly above a big dripleaf can cause it to tilt without touching it.
• MC-214127 – Despite being a type of berry plant, bees don't pollinate cave vines.
• MC-214283 – Hanging roots break sound event uses break3 twice, excluding break4.
• MC-217626 – Spore blossom is positioned rather strangely among flowers in Creative.
• MC-219445 – Bonemealing big dripleaf in flowing water doesn't update the water.
• MC-219873 – Lightning Bolt detecting lightning rod incorrectly.
• MC-220106 – Lightning hitting an entity on copper slabs on top another copper block fully cleans the bottom block first.
• MC-220215 – Opening a shulker box while an entity is standing on top of it pushes it too high for a short amount of time.
• MC-221756 – Snow particles do not render at all when the block light level is 7 or more.
• MC-221844 – Powder snow doesn't produce particles when broken by burning mobs.
• MC-221957 – Pick Block used on a level 15 light block returns a different item from the default light block.
• MC-222738 – Leads don't work with Glow Squids.
• MC-222882 – Spyglass in Search tab of creative inventory is mixed with block types instead of tools where it belongs.
• MC-223132 – Powder snow doesn't produce a breaking sound or subtitle, when destroyed through extinguishing a burning player, mob, or flame arrow.
• MC-223171 – Budding Amethyst and Copper variants are far away in the creative inventory.
• MC-223446 – Shulkers appear in the wrong place when riding an entity.
• MC-223820 – Azalea & Flowering Azalea aren't part of the block or item tags for #saplings.
• MC-223907 – Moss block appears in the #lush_ground_replaceable.json twice.
• MC-224325 – minecraft.used:minecraft.COMPOSTABLE_ITEM doesn't increase when placing an item into a composter.
• MC-224388 – Ores and raw materials in smelting preview are off center.
• MC-224389 – Copper Ingots are no longer grouped in the crafting table.

From the previous development version

• MC-224927 – Infested blocks take twice as long instead of half the time.
• MC-224972 – Infested blocks have no effective tool.
• MC-225025 – Server side performance drop with dragon's breath area effect clouds.