Common Errors

This page covers solutions for the most commonly reported Minecraft server errors.

Error Reference

Port Already in Use

FAILED TO BIND TO PORT

Another process is using the Minecraft port. Check the Pterodactyl Panel or restart your server.

Can't Keep Up!

Can't keep up! Is the server overloaded? Running Xms behind

The server is falling behind on ticks. See TPS and Optimization.

Java Version Mismatch

Unsupported class file major version

The server requires a newer Java version. Change your Java version in startup settings.

Missing Server Jar

Error: Unable to access jarfile server.jar

The server JAR is missing or has the wrong name. Check your server software installation.

Read Timed Out

Internal Exception: java.net.SocketTimeoutException: Read timed out

Network issues between client and server. Check your connection.

Whitelist Error

You are not white-listed on this server!

Your username is not on the whitelist. Ask the server owner to add you with /whitelist add <name>.

Banned Error

You are banned from this server!

Check the ban list with /banlist in console. Remove with /pardon <name>.

When to Contact Support

If you cannot resolve an error after trying the solutions listed here:

1. Gather your server logs (latest.log)
2. Note the exact error message
3. Document what you have already tried
4. Contact Cafora Support

See Also

• Server Offline
• Cannot Connect
• Server Crashes
• Plugin Errors