A game server that keeps crashing is frustrating for everyone. Players leave, progress is lost and you spend hours guessing at the cause. The solution is a systematic approach: check logs, isolate variables and work through the most common causes one by one.
Types of crashes
Not all crashes are the same. Identifying the type narrows down the cause immediately:
- Crash on startup. The server starts, prints some log lines, then stops. Usually a configuration error, missing file, wrong Java version or incompatible plugin/mod.
- Crash under load. The server runs fine with few players but crashes when the player count or activity increases. Points to resource exhaustion (CPU, RAM or disk).
- Freeze then crash. The server becomes unresponsive for several seconds before the process dies. Often caused by out-of-memory, a deadlocked plugin or garbage collection pauses.
- Random crash at any time. No clear pattern. Could be a bug in the server software, a corrupt world chunk, or a plugin that fails under specific conditions.
Step 1: Check server logs
Logs are your most valuable diagnostic tool. For Minecraft, check logs/latest.log and any crash reports in crash-reports/. For other games, look in the game's log directory. Read the last 50 to 100 lines before the crash. Look for:
- Error messages or stack traces (lines starting with "at" after an exception).
- "OutOfMemoryError" (see our OOM crash guide).
- Plugin or mod names mentioned in error lines.
- Warnings about ticks taking too long ("Can't keep up!").
Step 2: Check resource usage
In your hosting panel, review CPU and RAM graphs around the time of the crash. If CPU was at 100% or RAM was maxed out, the crash is resource-related. If both were low, the crash is likely a software bug or configuration issue.
Step 3: Test with minimal configuration
Remove all plugins or mods and start the server with a fresh world. If it runs stable, the issue is in your plugins, mods or world data. Add plugins back in small batches (five at a time), testing stability after each batch. This binary search method finds the culprit efficiently.
Step 4: Update server software
Run the latest stable version of your server software. For Minecraft, update Paper (or Purpur) to the newest build for your game version. Update plugins to versions that explicitly support your server version. Outdated software is one of the most common crash causes.
Step 5: Check disk space
A full disk causes silent failures. The server cannot write logs, save world data or create temp files. Check disk usage in your panel or with df -h over SSH. Clean up old backups, logs and unused worlds if space is low.
Step 6: Verify Java version (Minecraft)
Minecraft 26.1 and later require Java 25. Versions 1.20.5 through 1.21.11 need Java 21. Using the wrong Java version causes immediate crashes or subtle instability. Check with java -version and update if needed.
Common culprits by game
Minecraft
- Corrupt chunks: use a region fixer tool or delete the problematic region file.
- Plugin conflicts: two plugins modifying the same game mechanic.
- Wrong Java version for the Minecraft version.
Valheim, ARK, Rust
- Outdated server binaries after a game update.
- Save file corruption (restore from backup).
- Insufficient RAM for the world size.
When to ask for help
If you have checked logs, tested with minimal configuration, verified resources and updated software, and the server still crashes, contact your hosting provider. Share your logs and the steps you have already tried. Good hosts can check the node's health and system-level logs that you cannot access.
HostValues game hosting includes automatic crash detection and restart. If your server goes down, it comes back up within seconds. Our support team can also help diagnose persistent crash issues.
Where do I find crash logs?
For Minecraft: logs/latest.log for the main log, crash-reports/ for detailed crash reports with stack traces. For Valheim: check the console output or BepInEx/LogOutput.log if modded. For ARK: ShooterGame/Saved/Logs/. Most games write logs to a "logs" folder inside the server directory.
Can I recover a corrupt world?
Often yes. For Minecraft, use tools like MCA Selector to identify and delete corrupt chunks. The game regenerates them on next load. If the corruption is widespread, restore from your most recent backup. This is why regular backups are essential.
How do I set up automatic restart after a crash?
Most hosting panels (including Pterodactyl, used by HostValues) have a crash detection feature that automatically restarts the server when it stops unexpectedly. Enable it in your panel settings. For self-hosted servers, use a process manager like systemd (Linux) with Restart=always in your service file.
Tired of troubleshooting crashes? HostValues VPS hosting gives you full control with the reliability of enterprise hardware and 24/7 monitoring.
