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Update a Hytale dedicated server with its staged updater: run /update check, download the release with /update download, review /update status, then run /update apply --confirm. The server exits with code 8; a correctly configured wrapper applies the staged files and starts the server again. Your configuration, worlds, saves and mods are intended to remain in place, but you should still make and verify a backup before maintenance.
How Hytale’s dedicated-server update works
The Hytale Server Manual updated October 12, 2026 describes a two-part process. The server application stages a release, while the launcher wrapper performs the file replacement during the next launch cycle. This separation is why applying an update is not the same as restarting a process from the console.
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The normal sequence is:
/update checkasks whether a newer release is available./update downloaddownloads that release into staging./update statuslets you inspect what is staged./update apply --confirmtells the server to shut down and hand the staged update to the wrapper.
After the apply command, the server exits with code 8. The wrapper recognizes that exit code, replaces the release files and launches the updated server. As the manual puts it, “The server does not restart itself.” If you start the Java server directly instead of through the wrapper, the process can stop after applying because nothing is watching for exit code 8.
Prepare before taking the server offline
1. Announce a maintenance window
Tell players when the server will close and give them time to disconnect cleanly. Stop scheduled events, allow active saves to finish, and avoid beginning an update while a world-changing operation is in progress. A short, planned outage is safer than terminating the process while players are writing data.
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2. Confirm backups are enabled and usable
The documented default is RunBackupBeforeUpdate: true. The wrapper defaults also enable a backup before an update. Check the setting in your server configuration and confirm that the backup destination has enough free space. A setting is not a backup test: verify that a recent archive exists and that you know where the updater stores its backup directory.
For a high-value world, copy a backup outside the server installation as well. Keep the original world and configuration untouched until the new build has started successfully and players have completed a test connection.
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3. Check the runtime and hardware baseline
Hypixel Studios’ 2026 requirements specify at least 4 GB of memory and Java 25. Both x64 and arm64 systems are supported. Check the Java version used by the wrapper, not only the version installed for your interactive shell; services often point to a different executable. Leave headroom above the 4 GB minimum for the operating system, Java process, world size and mods.
4. Inventory extensions
The updater is designed to leave the mods/ directory intact, but an intact mod is not automatically a compatible mod. Record the enabled plugins and mods, their versions and any required dependencies. Check each project’s compatibility notes for the target server build before allowing players back in.
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Run the staged update from the server console
- Put the server in maintenance. Broadcast the shutdown time, prevent new sessions if your operations routine supports it, and wait for players to leave.
- Verify the backup. Confirm
RunBackupBeforeUpdateis enabled, check that storage is available and identify the latest backup. - Check for a release. In the authenticated server console, enter
/update check. If no update is offered, do not force one merely to repeat the operation. - Download the release. Enter
/update download. The files are placed in the updater’s staging area; the running binaries are not replaced at this point. - Use the force option only deliberately.
/update download --forceis intended for an intentional redownload of the current release or for bootstrapping the update layout. It is not the routine command for every update. - Inspect staging. Run
/update statusand confirm that the expected release is ready. If the status does not show a staged build, resolve that problem before applying anything. - Apply the staged files. Enter
/update apply --confirm. The server shuts down and returns exit code 8. - Let the wrapper relaunch it. Keep the wrapper process running. It detects exit code 8, applies the staged release and starts the server with the updated files. Do not immediately start a second copy on the same port.
- Validate the result. Read the startup log, confirm the reported server build, check that the world list and permissions are present, and connect with a test client before ending maintenance.
Which files change and which data stays
The staged updater selectively replaces release components rather than treating the installation as a blank server. The expected installation contains an asset archive, a launcher and a server directory:
game/
Assets.zip
start.sh (or start.bat)
Server/
HytaleServer.jar
configuration files
saves/
mods/Exact filenames inside the server directory can change between releases, so use the layout supplied with your installation. The important operational point is that the wrapper and the Server/ directory must remain in the relationship expected by the updater.
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|---|---|---|
HytaleServer.jar |
Replaced with the staged server binary | Startup log reports the intended build |
| Assets | Release assets are updated, including the staged asset archive when supplied | Server reaches a ready state without asset errors |
| Launcher wrapper | Release wrapper scripts may be replaced | Your service or scheduled task still invokes the new wrapper |
| Configuration | Preserved by the staged update | Port, authentication, permissions and custom settings remain correct |
| Worlds and saves | Preserved by the staged update | Worlds load and recent progress is present |
mods/ |
Preserved | Every extension supports the new server build |
Preserved does not mean risk-free. A failed write, an incompatible extension or a damaged pre-existing save can still prevent startup, which is why the pre-update backup and post-update validation are part of the procedure.
Verify the updated server before reopening it
Read the first startup cycle
Watch the wrapper output and server log from launch through the ready message. Look for Java-version errors, missing assets, configuration parse failures, mod-loading exceptions and authentication errors. A process that stays running but repeatedly logs exceptions is not ready for players.
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Check the data players care about
- Load each production world and confirm its expected name and recent progress.
- Test an administrator account and a normal player account so permission changes are visible.
- Check the configured port and query or status endpoint used by your monitoring.
- Join with a client running the same protocol release as the server.
- Exercise the most important modded features before declaring maintenance complete.
Keep the old backup until acceptance
Do not delete the updater backup immediately after a successful boot. Retain it until players have connected, saves have completed and you have checked the logs for a meaningful period. The backup is your fastest recovery path if a delayed mod error or world issue appears.
Protocol and client compatibility
Hytale requires the client and server to use exactly the same protocol version. A release that changes the protocol can therefore block every player who has not updated their client; changing firewall rules or port forwarding will not fix a protocol mismatch.
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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteWhen a player cannot connect after the update, compare the client’s displayed version with the server build and protocol in the startup information. If they differ, have the player update the game client or, when appropriate for your change-control plan, roll the server back to the version your player group is using. Do not loosen authentication or networking settings as a substitute for matching versions.
Automatic checks and manual approval
The default automatic check interval is 3,600 seconds, or one hour. Checking only discovers releases; it does not necessarily install them. AutoApplyMode is disabled by default, so an operator must confirm the apply operation manually. This default limits the chance that a protocol-changing release or incompatible mod will arrive during an active session.
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You can change automation only after deciding how your service handles backups, maintenance notices, health checks and rollback. If you enable automatic application, keep the wrapper in charge of restarts and ensure your service manager does not launch a duplicate process when the wrapper exits and relaunches the server.
Troubleshoot an update that did not complete
The /update commands are unavailable
Confirm that the installation uses the expected game/ layout and that the server is launched from the Server/ directory with Assets.zip and the wrapper in the parent directory. A server launched from an unrelated working directory, or a bare Java command that bypasses the wrapper, may not expose the staged-update commands correctly. Correct the launch path, stop the stray process and start the supported wrapper before trying again.
The update downloaded but was not applied
Run /update status to confirm that a release is staged, then run /update apply --confirm. If the server stops and remains stopped, inspect how it was launched. The server process does not restart itself; the wrapper must remain active to see exit code 8 and perform the replacement. A system service configured to run only java -jar HytaleServer.jar will not provide that behavior unless you adapt it to invoke the wrapper.
The wrapper starts, but the new server crashes
Capture the first error in the startup log rather than repeatedly retrying. Check Java 25, available memory, asset integrity, configuration syntax and every mod or plugin. If the failure began immediately after the update, use the updater’s backup directory and follow the wrapper’s rollback instructions. Restore the backup, start the previously working build through its supported wrapper and keep the failed logs for diagnosis.
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Players cannot connect
First compare client and server protocol versions. If they match, check that the server reached a ready state, the configured port is listening and the host firewall or provider network still exposes it. A protocol mismatch is an application-version problem, not a networking problem.
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Stop the server before making changes. Confirm that the wrapper started with the same working directory and configuration file used before the update, then inspect the world and save paths in configuration. Do not create a new world with the same name over the existing data. If the original save cannot be found or loads incorrectly, stop and restore the pre-update backup rather than experimenting on the only copy.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Self-hosting versus managed Hytale hosting
The command sequence is the same in principle, but responsibility differs. With self-hosting, you control the filesystem, wrapper, Java runtime, mods and rollback. With a managed provider, the control panel may expose one-click installation, scheduled backups and automatic updates while the provider operates networking, hardware and maintenance.
| Concern | Self-hosted server | Managed server |
|---|---|---|
| Files and mods | Full access; you must preserve the layout and test extensions | Access depends on the provider’s file manager, SFTP and mod policy |
| Backups and rollback | You configure storage, retention and restore procedures | The provider may automate backups, but you should verify export and restore options |
| Update automation | You run the wrapper and choose when to apply releases | Many panels offer one-click or automatic updates; confirm whether approval is available |
| Uptime and maintenance | You handle hardware, operating-system patches, monitoring and recovery | The provider handles infrastructure and usually offers support |
| Console and logs | Direct access to process output and files | Access varies by panel and plan |
| Recurring cost | Your hardware, power, storage and administration are the cost centers | A recurring hosting charge replaces much of the infrastructure work |
Official Hytale support identifies Nitrado, Apex Hosting, GPORTAL, Shockbyte and Dathost as Launch Verified providers. Their exact features, pricing and verification status can change, so confirm the current offering before moving a production world. Regardless of provider, ask where backups are stored, how to download them, whether automatic updates can be paused and how to access logs after a failed restart.
Operational limits worth recording
- The documented minimum is 4 GB of memory with Java 25; treat it as a floor, not a performance target.
- x64 and arm64 are supported architectures.
- The default update-check interval is 3,600 seconds.
RunBackupBeforeUpdateis enabled by default.AutoApplyModeis disabled by default and requires confirmation.- Authenticated server use is limited to 500 servers per Hytale game license.
- The documented game-session lifetime for provider authentication is one hour.
The last two limits concern licensing and authentication behavior, not the mechanics of replacing files. Account for them when designing a fleet or a managed-service integration, and consult the current manual if your deployment model depends on those limits.
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A repeatable maintenance checklist
- Announce the window and wait for clean player disconnects.
- Confirm a recent, restorable backup and free storage.
- Check Java 25, memory headroom and wrapper permissions.
- Review mod and plugin compatibility for the target release.
- Run
/update check. - Run
/update download; reserve--forcefor an intentional redownload or layout bootstrap. - Run
/update status. - Run
/update apply --confirm. - Wait for the wrapper to handle exit code 8 and relaunch the server.
- Read logs, test worlds and permissions, and connect with a matching client protocol.
- Keep the backup until the updated server has passed real player traffic.
Following this workflow updates the release files without deliberately replacing your worlds or configuration, while preserving a clear rollback path when a build, protocol or extension is not ready for production.
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