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Minecraft Snapshot 20W16A brings new Remnants content

Minecraft Snapshot 20W19A

Editor’s Note: This post incorrectly listed 20W16A as 20W19A, the Minecraft Snapshot 20W19A patch notes can be found here.

Mojang has been working steadily on new Nether-based content for coming updates, but that has not stopped their work on other minor content within the game. And just today the developers have issued a new Snapshot for testing some minor content updates and bug fixes. The newest Snapshot, Minecraft Snapshot 20W16A brings new content to the game and some minor changes.

A few new gameplay additions add a few new items that players may want to explore. The new Bastion content leads the charge, adding new units to the roster of NPCs and enemies in the game, as well as some new structures and building tools based on the faction. Players exploring this content will find new houses, bridges and other structures with this new flavor within Remnant areas.

The patch for the new Snapshot also includes minor bug fixes for issues affecting biome load and generation, as well as some backend problems affecting server stability.

You can find the full notes from Minecraft Snapshot 20W16A below:


  • Added bastion remnants
  • Added ruined portals
  • Added chain blocks
  • Added a new music disc titled “Pigstep” by Lena Raine which can only be found in bastions


What’s made of blackstone and full of Piglins and Hoglins Bastion remnants!

  • ​Added 4 separate bastion remnant types: bridge, Hoglin stable, housing units, and treasure room
  • You can find these sizable structures in all biomes in the Nether except the treacherous ash-dusted towers of basalt deltas
  • Explore, loot, and conquer a bastion remnant to call it your home… but beware, Piglins don’t take kindly to intruders stealing their things


Shattered remains of ancient nether portals. Wonder who built them?​

  • They can be found in any overworld or nether biome
  • Some are hidden underground, under the sea, or buried in sand


  • Increased the amount of lava pools to make the deltas more “deltary”
  • The Piglin banner pattern can now be found in bastions


  • Added a button in the GUI that generates a jigsaw structure starting from the jigsaw block, using given generation depth.
  • Expanded the max size per axis of Structure Blocks from 32 to 48
  • Added a JMX MBean to monitor dedicated server tick times
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It is now possible to monitor the server tick times though JMX.
The rationale for this is that JMX is a well known and supported monitoring technology with existing integrations and tools.

This enables server admins to hook alerts and graphing tools using ordinary JMX clients and dashboards.


  • A new flag enable-jmx-monitoring has been added to the file which if set to true will expose an MBean with the Object name net.minecraft.server:type=Server and two attributes averageTickTime and tickTimes exposing the tick times in milliseconds.
  • In order for enabling JMX on the Java runtime you also need to add a couple of JVM flags to the startup as documented here.


  • MC-37557 – Sometimes a minecart sound plays/subtitle shown when loading a world
  • MC-91163 – Certain subtitles show up when the player is too far away to hear the sound
  • MC-154617 – Server hangs on stop due to rcon
  • MC-171020 – New nether biomes don’t work properly in buffet worlds
  • MC-175919 – Villagers sometimes stop farming
  • MC-177136 – All compasses and lodestone compasses point to the same target, regardless of what type of compass it is
  • MC-177238 – Windows symbolic link in saves/ is no longer followed as of 20w14a
  • MC-177253 – Running a set_attributes function throws java.lang.NullPointerException if it contains an undefined attribute
  • MC-177316 – Lodestone compass in item frame does not update after turning
  • MC-178368 – When rotating a lodestone compass is put in the item frame the compass don’t work


Snapshots are available for Minecraft: Java Edition. To install the snapshot, open up the Minecraft Launcher and enable snapshots in the “Installations” tab.

Snapshots can corrupt your world, so please backup and/or run them in a different folder from your main worlds.

Cross-platform server jar:

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