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Minecraft 21w17a

Weekly work-in-progress build. Things break and get removed again. Full source data for this version is extracted and browsable below.

2,109 names shipped in this version. Each result opens the wiki page for that thing.

Contents (7)
  1. What changed in 21w17a
  2. Block states changed
  3. New in-game text
  4. Fixes
  5. Development cycle
  6. Browse this version
  7. Neighbouring versions

Java What changed in 21w17a

Everything below is measured by comparing the game files of 21w16a with 21w17a — not copied from patch notes.

Block states changed

BlockAddedRemoved
Amethyst Cluster—lit = true false
Hanging Rootswaterlogged = true false—
Large Amethyst Bud—lit = true false
Medium Amethyst Bud—lit = true false
Small Amethyst Bud—lit = true false

New in-game text 4

KeyText
commands.worldborder.set.failed.bigWorld border cannot be bigger than %s blocks wide
commands.worldborder.set.failed.smallWorld border cannot be smaller than 1 block wide
multiplayer.disconnect.invalid_packetServer sent an invalid packet
multiplayer.disconnect.invalid_player_dataInvalid player data

Fixes 19

Read from Mojang’s own release notes for Minecraft Snapshot 21w17a, published 2021-04-28. Every entry keeps its original bug ID.

19 issues fixed, read from Mojang’s own patch notes. Each entry keeps its original bug ID.

Bugs fixed in 21w17a 19

  • MC-170443 Banner copying recipe ignores existence of other items in crafting grid
  • MC-187664 World border uses float to determine its size, making some border sizes inaccessible, and cannot be set to 30 million or beyond
  • MC-201269 Constantly teleporting player to a phantom crashes the game/kicks the player
  • MC-203570 Candles aren't grouped in the recipe book
  • MC-203745 Repeated teleport between dimensions causes the entity to duplicate on the client
  • MC-204031 Waxed Cut Copper (any level of weathered) have two separate recipes in the recipe book
  • MC-214187 Void platform generates multiple times
  • MC-214735 Horse disappears when dying while riding it and reloading the world while it's unloaded
  • MC-214838 Big dripleaf stem remains after breaking a stem or leaf above it
  • MC-214865 Floating islands world type generates extreme terrain
  • MC-219155 Fishing line only starts on half distance between the fishing rod and bobber (Apple M1 only
  • MC-219840 You cannot unlock the recipe for Mossy Stone Bricks
  • MC-219842 Recipes for mossy cobblestone and mossy stone bricks aren't grouped
  • MC-220033 Parity issue) Hanging Roots can't be waterlogged
  • MC-221560 Copper/Coal Ore in Deepslate Patches aren't Deepslate Ores
  • MC-222008 Empty/missing template pool error grammar mistake
  • MC-222520 Raw and Ore smelting previews aren't grouped together
  • MC-223055 Amethyst buds and cluster have an unused blockstate
  • MC-223792 Shrinking world border with center past x/z 29999983 crashes the game

Development cycle

This build was part of the run-up to 1.17. Everything tested here landed in that release.

Browse this version