What is a StackOverflowError?
A java.lang.StackOverflowError occurs when a thread in the Java Virtual Machine (JVM) exceeds the stack size allocated to it. In the context of Minecraft servers, this typically happens when a piece of code enters an infinite loop of method calls, causing the stack to grow until it runs out of memory.
Common Causes
- Corrupted World Data: Often triggered by chunk errors or entities with invalid NBT data.
- Incompatible Plugins/Mods: Two plugins attempting to call each other in a recursive loop.
- Complex Redstone/Command Blocks: Extremely deep or circular logic chains.
How to fix it
1. Identify the culprit
Check your server logs in the File Manager. Look for a stack trace immediately following the error. This will usually name the specific plugin, mod, or class file responsible for the loop.
2. Remove problematic content
- On AwakeNode: Use the File Manager to locate and remove the identified plugin or mod. If the error persists, download fresh copies of the mods or plugins it depends on and upload them again.
- On other hosts: Use an SFTP client to access your server files. Navigate to the
pluginsormodsfolder and remove the file identified in the stack trace, then restart your server.
3. Check for world corruption
If the error occurs as soon as a player logs in or a specific chunk loads, your world data may be corrupted.
- On AwakeNode: You can use the File Manager to rename your world folder to force the server to generate a fresh map. If the server starts successfully, the issue lies within your original world files.
- On other hosts: Manually rename or move your world folder via SFTP to test if the server boots with a clean world.
4. Contact Support
If the error persists despite removing plugins and testing a new world, the issue may be related to underlying JVM arguments. You can set your own startup command, JVM flags included, in the Startup tab; the memory setting follows your plan.
Questions
Can I increase my stack size to fix this?
To add your own JVM flags, set a custom startup command in your server's Startup tab.
Will upgrading my RAM fix a StackOverflowError?
No, this error is caused by a logic loop in the code, not by a lack of total system memory. Upgrading your plan will not resolve this specific issue.
How do I find the error log?
You can view your server logs directly through the File Manager in your AwakeNode control panel by opening the logs folder and selecting latest.log.
Is my world permanently lost?
Not necessarily. If the error is caused by a specific entity or chunk, you may be able to use external tools like MCEdit or Amulet to remove the corrupted data.