Skip to main content
Minecraft is a unique ecosystem defined by its distinct developmental eras. From the legendary 1.8.8 PvP builds to the modern 1.21+ mechanical updates, managing your server version is a core responsibility for every owner. Unlike traditional games that use automated updates, Minecraft requires a precise synchronization between the game JAR and the underlying Java Runtime Environment (JRE). The FREAKHOSTING Game Panel provides an automated system to handle these transitions, ensuring your community always has access to their preferred gameplay experience.

Difficulty

Beginner

Time

5 Minutes

​
Technical Java Requirements

Using an incompatible Java version is the primary cause of server startup failures. use this technical registry to identify the correct environment for your intended version.
Minecraft VersionRecommended Java Runtime
1.18 - 1.21+Java 17 or Java 21
1.17.xJava 16
1.8 - 1.16.5Java 8 or Java 11

​
Version Migration Workflow

Follow these steps to transition your server to a new software build.
1

Data Preservation

Warning: Downgrading versions (e.g., 1.21 to 1.19) will permanently corrupt your world files. Always create a Full Backup of your /world/ directory before initializing a migration.
2

Configure the Runtime

Navigate to the Startup tab. Locate the Docker Image dropdown and select the Java version identified in the technical table above.
3

Define the Software Build

In the same Startup tab, update the Server Version (or MINECRAFT_VERSION) variable to your desired target (e.g., 1.20.4, latest, or snapshot).
4

Initialize Automated Rebuild

Navigate to Settings -> Reinstall. The panel will programmatically retrieve the correct JAR and support files, replacing your current engine binaries.

​
Troubleshooting Initialization Errors

If your console displays this specific error, it confirms a mismatch between your Java version and the Minecraft JAR. Return to the Startup tab and verify that your Docker Image matches the requirements for your game version.
If the server starts but the world appears reset or corrupted, ensure you are not attempting to load a “Newer Version” world on an “Older Version” engine. The Minecraft world format is not backwards compatible.

​
Need Extra Help?

If you encounter any issues, our support team is ready to assist:

​
Save on Your Hosting

Ready to get a new server? Use code KB20 at checkout for 20% off your first month!
Last Updated: January 2026 | Minecraft: Infinite possibilities.