Java Edition 17w14a

This page covers a development version that has a major issue under certain conditions.

 

The dedicated server for this version has a security vulnerability in the Log4j library that could be used to perform a remote code execution exploit. It can be addressed by appending a certain JVM argument to the server startup command line.^[1]

Minecraft 17w14a

{
    "title": "Minecraft 17w14a",
    "images": [
        "17w14a.png",
        "Java Edition 17w14a.png"
    ],
    "rows": [
        {
            "field": "''(link to Java Edition article, displayed as Java Edition)''",
            "label": "(link to Edition article, displayed as Edition)"
        },
        {
            "field": "April 5, 2017",
            "label": "Release date"
        },
        {
            "field": "(link to Snapshot article, displayed as Snapshot)",
            "label": "(link to Version types article, displayed as Type)"
        },
        {
            "field": "(link to Java Edition 1.12 article, displayed as 1.12)",
            "label": "Snapshot for"
        },
        {
            "field": "[https://piston-data.mojang.com/v1/objects/23500be7cee6c8a4519d475a7c8f2b8493a3336f/client.jar Client] ([https://piston-meta.mojang.com/v1/packages/51f1acd9b0e5f8dff45dc80b4d73eb8e8317e733/17w14a.json .json])<br />[https://piston-data.mojang.com/v1/objects/0530caf1d099fc730ca335a21bcf2fbb58c42c64/server.jar Server]",
            "label": "(link to Tutorial:Installing a version#Manual version installation article, displayed as Downloads)"
        },
        {
            "field": "320",
            "label": "(link to Protocol version article, displayed as Protocol version)"
        },
        {
            "field": "1124",
            "label": "(link to Data version article, displayed as Data version)"
        },
        {
            "field": "3",
            "label": "<span normal;\">(link to Pack format#List of pack formats article, displayed as Resource pack format)</span>"
        },
        {
            "field": "<span class=\"plainlinks\">[https://en.wikipedia.org/wiki/Java_version_history#Java_SE_8_.28LTS.29 Java SE 8]</span>",
            "label": "<span normal;\">Minimum Java version</span>"
        }
    ],
    "invimages": [],
    "footer": "<table auto; word-break: break-word;\">\n<tr inherit;\">\n<td 0.4em\" >[[Java Edition  1.11.2|<span  1.11.2]]</td>\n<td 0.4em\">'''[[Java Edition 1.12|1.12]]'''</td>\n<td 0.4em\" >[[Java Edition  1.12.1|  1.12.1 <span inherit;\">\n<td 0.4em\">\n[[Java Edition  17w13b|◄   17w13b]]\n</td>\n<td 0.4em\">''' 17w14a'''</td>\n<td 0.4em\">\n[[Java Edition  17w15a|  17w15a ►]]\n</td>\n</tr>\n</table>"
}

17w14a is the fourth snapshot for Java Edition 1.12, released on April 5, 2017.^[2]

Parrots

• They are now able to make sounds while sitting on the player's shoulders.
• Parrots now dance and change colors if playing music on a nearby jukebox.
• Changed the  Right Mouse Button action:
  • When used on a tamed parrot, it tells it to sit down.
• Walking over/through/near a tamed parrot while crouching cause it to sit on the player's shoulders.

Zombies

• New ConversionPlayerLeast and ConversionPlayerMost tags.
  • Contains the UUID of the player that is converting the zombie.
  • Used with the "minecraft:cured_zombie_villager" trigger for advancements.

Advancements

• Added 8 advancements, 7 of which are in the new "Adventure" tab.
• Advancements added in this version include:

Minecraft/Adventure
Icon	Advancement	In-game description	Parent	Actual requirements (if different)	Resource location	Rewards
	Cure a zombie villager	Descriptions were not added yet.	Brew a Weakness Potion	The advancement is granted when the zombie villager converts into a villager.	story/cure_zombie_villager	—
	Adventure	—	—	Kill any entity, or be killed by any entity.	adventure/root	—
	Change your spawn point	—	Adventure	Sleep in a bed.	adventure/sleep_in_bed	—
	Complete a trade	—	Adventure	Trade with a villager.	adventure/trade	—
	Kill a mob	—	Adventure	Kill one of these 22 mobs: Blaze Cave Spider Creeper Enderman Evoker Ghast Guardian Husk Magma Cube Polar Bear Shulker Silverfish Skeleton Slime Spider Stray Vindicator Witch Wither Skeleton Zombie Zombie Pigman Zombie Villager	adventure/kill_a_mob	—
	Kill all the mobs	—	Kill a mob	Kill each of the mobs mentioned above.	adventure/kill_all_mobs	—
	Shoot something	—	Kill a mob	Hit a mob with a shot arrow.	adventure/shoot_arrow	—
	Sniper duel	—	Shoot something	Kill any mob with a shot arrow from at least 50 blocks away.	adventure/sniper_duel	—

• Changes to some existing advancements:
  • "Summon the Wither" now works properly when player summons a wither.
  • "Brew a Potion" changed to "Brew a Weakness Potion"; now requires specifically taking a potion of Weakness out of a brewing stand.
    • Icon of the advancement was changed to a potion of Healing.
  • "Create a full beacon" is now a "goal" type advancement instead of a "challenge".
• Pop-up notification for when players advance.
  • New sliding effect.
  • Comes in two different colors - yellow for normal advancements, and pink for "challenge" advancements.

NBT format

• recipeBook: Now a compound tag (was a string) containing recipe book information
  • isFilteringCraftable: Becomes 1 if the player has enabled the "Show Craftable" feature in the recipe book.
  • isGuiOpen: Checks if the player has left the GUI open.
    • unlocked
  • recipes: Contains information about all recipes the player has seen.
    • displayed: Checks if the player has tried out the recipe in the recipe book before (by clicking it/viewing it)

Recipe book

• Changed the icon on the trigger button, from a standard book to the knowledge book.
• Added a shift-click ability to the recipe book that puts all available materials in the crafting grid.
• Added a new white-and-gray colored notification that pops up when the player unlocks new recipes.
  • The notification only appears upon reloading the world; Dinnerbone has stated that this is a bug.^[3]
• If player searches "excited" (changed in 17w18a) in the recipe book, language switches to Pirate Speak.

Splashes

• "Now Java 6!" changed to "Now Java 8!"

21 issues fixed

From the 1.12 development versions

• MC-114879 – Picking up an item has a chance to duplicate it
• MC-114896 – Parrots don't make any sounds when they are on your shoulder
• MC-114943 – Items in crafting table disappear when selecting a recipe
• MC-114976 – Parrots don't show up on subtitles
• MC-114987 – Unknown recipe message not translated
• MC-114989 – recipe command causes unknown errors with invalid player argument
• MC-114999 – Hover text of items in crafting grid is rendered behind crafting help
• MC-115028 – Crafting recipe pop-up renders above items in the inventory gui
• MC-115054 – Recipe interface doesn't remember "showing all/craftable" preference when inventory closed
• MC-115065 – "loot" reward for advancements does not provide items
• MC-115067 – All instances of entity-matching conditions do not function for advancements
• MC-115074 – Potion effects are still rendered under the recipe book
• MC-115100 – Hover text of items in crafting help does not use same text and text box like hovering over item in inventory
• MC-115107 – Helmet does not render after using autorecipe feature
• MC-115123 – Parrots keep moving their legs even if they are on shoulders
• MC-115129 – Missing crafting recipe resources render in front of item description
• MC-115153 – recipe command not showing an error with invalid first argument
• MC-115175 – New crafting menu texture bug
• MC-115204 – Crash when canceling/changing recipe in recipe book with full inventory

From the previous development version

• MC-115191 – Parrots disappear completely when leaving the End via a portal
• MC-115209 – Crafting Book Not Accounting for Item Count

• 17w14a was previously removed from the launcher for some time, but was added back in September 2018.

• 
  "Minecraft" advancement tree in 17w14a.
• 
  "Adventure" advancement tree in 17w14a.