Minecraft: Java Edition ยท Patch release
Minecraft 1.21.7
1.21.7 was a hotfix that cleared 16 issues, most of them graphics and memory problems including a severe leak that caused out of memory crashes. It also added the Lava Chicken music disc and the Dennis painting.
- Released
- Server needs
- Java 21
- Protocol
- 772
Seven days free, no card. Pick 1.21.7 when you create the server, or switch an existing one from the panel.
What changed in Minecraft 1.21.7
The fixes and changes of this release.
- Fixed a severe memory leak causing OutOfMemoryError crashes
- Fixed crashes on AMD graphics and a texture atlas memory leak
- Fixed moon rendering on Qualcomm graphics
- Added the Lava Chicken music disc by Hyper Potions
- Added the 3x3 Dennis painting by Sarah Boeving
- Not compatible with 1.21.6 servers
Blocks and items
- Lava Chicken music disc drops from a baby zombie riding a chicken
- Dennis painting added at 3 by 3 blocks
Commands and technical
- Fixed a resource pack with a 32000 pixel atlas breaking the game
- Fixed TTF glyph rendering errors and text display z-plane conflicts
Running a Minecraft 1.21.7 server
What the release means for whoever runs the server.
- Requires Java SE 21
- Network protocol 772, not compatible with 1.21.6 servers
- Data pack format 81
- Resource pack format 64
- Data version 4438
- Protocol changed, so clients must update to match the server
Before you update a world: take a backup. A world opened in 1.21.7 cannot be opened in an older version again. How backups work here.
1.21.7 on FadeHost
- The right Java, set for you
- A 1.21.7 server needs Java 21, and the panel starts it with a Java that fits. Nothing to install, nothing to pick.
- Server software for 1.21.7
- PaperPurpurVanillaFabricForgeNeoForge
- Who can join
- Players on 1.21.7 and on 1.21.8: the network protocol is the same.
Questions about 1.21.7
When was Minecraft 1.21.7 released?
Minecraft: Java Edition 1.21.7 was released on June 30, 2025.
What Java version does a Minecraft 1.21.7 server need?
Java 21. On FadeHost the server starts with the right Java for its Minecraft version on its own, so there is nothing to install or switch.
What did Minecraft 1.21.7 change?
1.21.7 was a hotfix that cleared 16 issues, most of them graphics and memory problems including a severe leak that caused out of memory crashes. It also added the Lava Chicken music disc and the Dennis painting.
Can players on another version join a 1.21.7 server?
Players on 1.21.8 can: the network protocol (772) is the same. Any other version has to match the server, unless a Paper server runs plugins such as ViaVersion and ViaBackwards.
Can I update my world to Minecraft 1.21.7?
Yes. Take a backup, switch the server to 1.21.7 and start it: the world is converted on the first boot. A world opened in 1.21.7 cannot be opened in an older version again, so keep the backup until you are sure.
How do I start a Minecraft 1.21.7 server?
Create a server on FadeHost and pick 1.21.7 in the software list: Paper, Purpur, Vanilla, Fabric, Forge and NeoForge are there for this version. It is online in about a minute. The free tier runs a 2 GB server at no cost, and a paid server is sized to the RAM you need.
The release before
Minecraft 1.21.6 Chase the Skies
June 17, 2025
The release after
Minecraft 1.21.8
July 17, 2025
Read on
Change a server's version
Version, software and loader build are one setting in the panel.
Java version errors
What the wrong Java looks like in the console, and why it does not happen here.
RAM calculator
How much memory a server needs, sized from servers measured on our nodes.
Every Minecraft version
All releases, what each one added and the Java it needs.
Release facts from the Minecraft Wiki:Java Edition 1.21.7. Minecraft is a trademark of Mojang; FadeHost is not affiliated with Mojang or Microsoft.