Java Edition 1.17 Pre-release 1

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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 1.16.5|<span style=\"margin-right:-0.35em\">◄</span>◄  1.16.5]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 1.17|1.17]]'''</td>\n<td style=\"padding: 0.4em\" >[[Java Edition 1.17.1| 1.17.1 <span style=\"margin-right:-0.35em\">►</span>►]]</td>\n</tr>\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\">\n[[Java Edition 21w20a|◄  21w20a]]\n</td>\n<td style=\"padding: 0.4em\">''' 1.17 Pre-release 1'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 1.17 Pre-release 2| 1.17 Pre-release 2 ►]]\n</td>\n</tr>\n</table>"
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1.17 Pre-release 1 (known as 1.17-pre1 in the launcher) is the first pre-release for Java Edition 1.17, released on May 27, 2021,^[1] which re-added candles to Survival mode, changed credits and the glowing on signs, added new advancements and splashes, and fixed bugs. This is the first pre-release released in 2021.

Candles

• Re-added candles to the creative inventory.
• Candles can be crafted again.

Potted azalea and potted flowering azalea

• Obtained by planting azalea or flowering azalea into a flower pot.

/perf

• Starts a recording for 10 seconds capturing metrics such as tick durations, used heap sizes and other more detailed stats.
• Executing again before the 10-second limit ends the recording early.

Advancements

• Added eleven new advancements:
  • Whatever Floats Your Goat!
    • Float in a boat with a goat.
  • Wax On
    • Apply wax to a copper block.
  • Wax Off
    • Scrape wax off a copper block.
  • The Cutest Predator
    • Catch an axolotl in a bucket.
  • The Healing Power of Friendship!
    • Team up with an axolotl and win a fight.
  • Glow and Behold!
    • Make a sign glow.
  • Light as a Rabbit
    • Walk on powder snow with leather boots.
  • Surge Protector
    • Have lightning strike a lightning rod near a villager without setting the area on fire.
  • Is It a Bird?
    • Look at a parrot through a spyglass.
  • Is It a Balloon?
    • Look at a ghast through a spyglass.
  • Is It a Plane?
    • Look at an ender dragon through a spyglass.
• Adds new advancement triggers.
  • started_riding
    • Triggered when player starts riding a vehicle or entity starts riding vehicle currently ridden by player.
  • lightning_strike
    • Triggers for any player on the server when lightning finishes (i.e. entity disappears).
  • using_item
    • Triggered for every tick of using items (like crossbows, spyglass, fishing rods, etc).

Predicate

• Added lightning_bolt sub-predicate.

Splashes

• Added the following splash texts:
  • "[this splash text has been delayed until part 2]"
  • "Contains simulated goats!"
  • "Home-made!"
  • "There's <<a cat on ,my keyboard!~" [sic]
  • "The cutest predator you'll ever meet!"
  • "Now you are thinking with pistons!"
  • "Get to the coppah!"
  • "Board game version also available!"
  • "Honey, I waxed the copper!"
  • "Plant-based light sources!"
  • "Made by "real" people!"

Tags

• Added lava_pool_stone_replaceables block tag.
  • Includes the #features_cannot_replace block tag and the #leaves block tag.
• Added geode_invalid_blocks block tag.
  • Includes bedrock, water, lava, ice, packed ice, and blue ice.

Candles

• Candles now have a different texture when lit.

Signs

• Glowing text on signs now has an outer glow, making text in dark colors more visible in the dark.

Big dripleaf and small dripleaf

• Changed the held item models in the player's right hand.

/debug

• Removes debug report command.
• Replaced by  +  and /perf.

Advancements

• Added source condition to effects_changed trigger.

Crafting

• It is now no longer possible to craft suspicious stew using flowering azalea or flowering azalea leaves.^[2]

Credits

• Updated the credits, which were brought over from Bedrock Edition; as a result, the credits are significantly longer, as they include people and corporations that did not work on Java Edition.^[3]
• Changed the format from .txt to .json.
• Now scroll faster when holding .

Predicate

• Added passenger, stepping_on and lightning_bolt properties to entity_properties predicate
• Added looking_at (entity currently viewed by player) condition to player sub-predicate.
• Expanded item field on item predicate to items.
• Now accepts an array of item types.
• Expanded block field on block predicate to blocks.
  • Now accepts an array of block types.

Splashes

• Removed "Woo, /v/!"

Tags

• Added flowering azalea and flowering azalea leaves to the flowers block and item tags.
• Removed flowering azalea and flowering azalea leaves from the small_flowers block and item tags.
  • This prevents endermen from picking up these blocks, as well as crafting suspicious stew with them.
• Removed moss carpet from the mineable/axe block tag.
• Added potted azalea bushes and potted flowering azaleas bushes to the flower_pots block tag.
• Added non-waxed oxidized copper variants to the needs_stone_tool block tag.

64 issues fixed

From released versions before 1.17

• MC-19690 – Reducing maxHealth / max_health can cause fake death.
• MC-65587 – Lag spike while loading player head textures/player skins.
• MC-99680 – Heart jittering effect doesn't take absorption into account.
• MC-104897 – End crystals placed on exit portals generated before 1.9 do not respawn the ender dragon.
• MC-118757 – Increasing Game State Rain Level values make the game increasingly laggier and distorts UI.
• MC-130523 – Void World spawns you at y=0 even if you entered 64 air blocks in customization.
• MC-148809 – Structure block data length limited to 12.
• MC-163945 – Intersecting structures can create corrupted block entities (spawner / chest).
• MC-189336 – ing around servers in the server list crashes the game (ArrayIndexOutOfBoundsException).
• MC-190952 – Apostrophe in "Developers of Mo' Creatures" heading is inconsistent with other apostrophes in credits.
• MC-192889 – When placing certain heads or putting them in entities' head slot the game stutters.
• MC-197942 – Leaves change to stone near Lava Pool (Recurrence of MC-48340).
• MC-198957 – End Portal Frames change to Stone near Lava Pool.
• MC-202249 – Angering passive mobs in new nether chunks very far away from previously generated chunks, then entering a nether portal causes server to completely freeze.
• MC-203131 – Setting the weight in Template Pool to high values will lag world and can cause out of memory error.
• MC-209819 – Server crash when pathfinding to player that is teleporting away.
• MC-213062 – A ruined portal generated in an end portal.
• MC-218112 – SynchedEntityData is using locks incorrectly.
• MC-218972 – The glowing effect outline omits parts of entities if the entity is invisible.
• MC-224778 – Game crashes when there is a block with no facing block state in #wall_corals and a warm ocean tries to generate.

From the 1.17 development versions

• MC-203558 – Lighting a candle is sometimes delayed.
• MC-203661 – Flowing liquids look very dark through tinted glass.
• MC-203704 – Candles don't show flame animations when particles are set to "Minimal".
• MC-204649 – Amethyst blocks don't make chime sounds when walked on by certain mobs.
• MC-205035 – Powder Snow Bucket is not grouped with Snowball or buckets in creative inventory.
• MC-208604 – While the mainhand is empty and there's a loaded crossbow in the offhand, the mainhand will appear invisible.
• MC-211601 – Entities are loaded after scheduled ticks are processed causing detector rails, pressure plates, etc. to turn off.
• MC-212142 – Applying glow ink on signs doesn't render the text bright without also having applied a custom color.
• MC-212146 – Glow lichen can generate floating inside underground structures.
• MC-212207 – Geodes generating inside icebergs.
• MC-213799 – Dripleaf isn't properly held in the player's hand.
• MC-214057 – Entities no longer showing flame animation when in water/lava at the same time.
• MC-214636 – Small dripleaf leafs can overlap each other and cause z-fighting.
• MC-214684 – Azaleas cannot be placed in flower pots.
• MC-216276 – Lava pools break bedrock with custom world generation.
• MC-218831 – Lots of missing shaders in the game assets.
• MC-219762 – More performant noise blending algorithm in BlendedNoise.
• MC-221554 – When searching, the goat spawn egg appears in the middle of the different boat types.
• MC-221819 – Inconsistency: Enderman is able to pick up flowering azalea leaves, while unable to hold other types of leaves.
• MC-221820 – Inconsistency: Enderman is able to pick up flowering azalea, while unable to hold normal azalea bush.
• MC-223021 – glShaderSource fails on some AMD drivers resulting in a crash on 1.17.
• MC-223843 – Mycelium inside enderman_holdable.json twice.
• MC-224159 – Absorbtion hearts don't have the wither heart effect.
• MC-224349 – Attempting to save multiple debug profiles during the same second fails to properly save all but the first profile.
• MC-224445 – Reloading resource packs with fabulous graphics causes screen to become black, after a few times causes crash for AMD drivers.
• MC-224861 – Falling blocks disappear for a moment when landing.
• MC-224862 – Azalea and Flowering Azaleas can take bone meal despite being on clay.
• MC-225010 – Closing the inventory in creative mode while having an item on the cursor turns it into a ghost item.
• MC-225129 – Players do not despawn until they respawn.
• MC-225193 – Goats will attempt to ram entities that are outside of the world border.
• MC-225315 – Selected text on signs blinks.
• MC-225404 – The axe is still an appropriate tool for moss carpets.
• MC-225722 – java.lang.IllegalArgumentException: bound must be positive.
• MC-225773 – Axolotls can make ambient noises when they're playing dead.
• MC-226192 – Crash upon attempting to create a new scoreboard objective: java.lang.NullPointerException: Cannot invoke "String.toLowerCase(java.util.Locale)" because "☃" is null.

From the previous development version

• MC-225843 – Snow layers can still generate floating over lakes.
• MC-225850 – Grass, tall grass, flower, double flower, fern, large fern and tree can generate on sand or gravel.
• MC-225853 – Minecraft sometimes crashes when trying to start 21w20a for the first time.
• MC-225895 – Floating grass can still generate above lava lakes.
• MC-225916 – Non-waxed oxidized copper blocks don't require at least stone tier to be mined.
• MC-225919 – Coal Ore from fossils can generate through bedrock.
• MC-225929 – Item statistic sorting not functioning.
• MC-225978 – Non-waxed weathered copper blocks appear twice in needs_stone_tool.json.

Private issues

• MC-213869 – Ender dragon's death animation resets when the chunk it is in is reloaded.

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