Minecraft | Failed to check session lock

If your server fails to start and appears to crash randomly, and you encounter the following error in your console and server log:

"net.minecraft.server.WorldConflictException: Failed to check session lock, aborting"

Follow these steps to resolve the issue:

1. Stop your server.

2. Access your server files and locate the folder for your main world.

tip

The default Minecraft world is named world

3. Within the main world's folder, delete the session.lock file.

4. Start your server again, and it should now start up without any issues.