Java’s compile-time checking does a pretty good job of keeping exceptions safely caged—you can’t call a method that throws a checked exception without catching the exception or declaring ...

To fix Internal Exception: java.io.IOException, An existing connection was forcibly closed by the remote host Minecraft error, you need to follow the given solutions.

Others may also encounter the internal exception error due to a glitch from the Minecraft server, or when the connection to the server is being blocked by Windows Firewall.

Minecraft Internal Exception errors can be frustrating to get rid of if you do not know what to do.