Exception Server Tick Loop

Written By Xylo01

Last updated About 10 hours ago

How to Fix the 'Exception in Server Tick Loop' Error in Minecraft

The "Exception in Server Tick Loop" error in Minecraft is a common issue caused by corrupted .json configuration files. This guide will walk you through the steps to resolve the issue and get your server back up and running.

What Causes This Error?

This error, typically displayed as:

java.lang.NullPointerException: Exception in server tick loop

indicates that one or more of your server’s .json files, such as whitelist.json, banned-players.json, or banned-ips.json, has become corrupted or improperly formatted.

Steps to Fix the Error

Follow these steps to resolve the issue:

  1. Stop the Server Access your game control panel and stop the Minecraft server to prevent further corruption.

  2. Navigate to the File Manager Locate your server’s file manager through the control panel.

  3. Identify and Delete Problematic Files Find and delete the following files:

    • whitelist.json

    • banned-players.json

    • banned-ips.json

  4. Restart the Server Start the server again. Minecraft will automatically regenerate the deleted files in the correct format.

Alternative Solutions

Restore from Backup

If you have backups of the affected .json files, you can restore them. Ensure the backup files are not corrupted before use.

Validate and Correct File Format

If you prefer not to delete the files, you can validate and fix their formatting using a JSON validator and formatter tool. Ensure:

  • The file starts with [ and ends with ].

  • The JSON syntax adheres to standard rules.

Preventing Future Issues

  • Regularly back up your server files to avoid losing important data.

  • Use a JSON validator before editing .json files manually to ensure they remain correctly formatted.

By following these steps, your server should be free of the "Exception in Server Tick Loop" error and running smoothly again.