21w19a[1] is the twenty-first snapshot for Java Edition 1.17, released on May 12, 2021, which increases the minimum Java version to 16.
Additions
Command syntax
/item
- New syntax:
/item replace <target> with <item stack> [<count>]- Same as old
/replaceitem.
- Same as old
/item replace <target> from <source> [<modifier>]- Copies item for source to target(s), optionally applying modifier.
/item modify <target> <modifier>- Modifies item (without copying).
General
- Added
mineable/axe,mineable/hoe,mineable/pickaxe, andmineable/shovelblock tags.- Blocks with these tags can be destroyed more quickly with the matching tool.
- Added
needs_stone_tool,needs_iron_tool, andneeds_diamond_toolblock tags.- If a block requires the correct tool to drop, these tags determine which tier of that tool is required.
Changes
Blocks
- The maximum length a name of an item can have after being renamed has been increased to 50.
World generation
- Made geodes significantly rarer.
General
- Removed some unfinished items, including Sculk Sensor, Bundle and Candle, but still can be obtained via
/givecommand.
Changes have been made to the official Caves & Cliffs world generation preview datapack, which gives early access to the world generation coming in Java Edition 1.18.[a]
Technical
- Other
- Java version requirement increased to 16.
Fixes
- 43 issues fixed
- From released versions before 1.17
- 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-223227 – Floating water caves in caves under the ocean.
- 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-205626 – The command syntax order of
/itemis 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-214220 – Items in water streams don't fall from big dripleaves, but constantly try.
- MC-214283 – Hanging roots break sound event uses
break3twice, excludingbreak4. - 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-221309 – Experience orbs produce particles whilst moving through powder snow.
- 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.jsontwice. - MC-224322 – Powder snow can create ghost blocks in creative mode.
- MC-224325 –
minecraft.used:minecraft.COMPOSTABLE_ITEMdoesn'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.
References
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