"Failed to check session lock" is an error message that can occur randomly in a Minecraft server when it cannot access the session file. It will cause the server to crash. Addressing this error is essential as it can prevent players from accessing the server and cause frustration for both players and server admins. The fix is navigating to the world folders and deleting the session.lock files. For any help or questions, start a conversation with support here.
Note: This error will appear in the console:
net.Minecraft.server.WorldConlictException: Failed to check session lock, aborting.
1. Log in to the BisectHosting Starbase panel.
2. Stop the server.
3. Go to the Files tab.
4. Open the main world file.
5. Select the session.lock file and choose Delete.
6. Start the server.