Minecraft

How to fix the "Internal Exception: java.io.IOException" error in Minecraft

Minecraft·March 22, 2026·11 min read

Have you been playing peacefully on your Minecraft server and suddenly this annoying error appeared? 😡 "Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host". Do not worry! Below, we explain the most common causes and how to fix it. 👇

Connection lost

  • Unstable Internet connection 📶This is one of the most common reasons. A weak or interrupted connection can cause Minecraft to lose its link with the server, resulting in this error.
  • Incorrect server configuration ⚙️Sometimes, the server parameters are not properly adjusted, which can cause the server to close the connection.
  • Firewall or Antivirus blocking the connection 🔒Your firewall or antivirus may be blocking the connection to Minecraft, interpreting the traffic as suspicious.
  • Issues with the Minecraft client 💻Sometimes, the problem may be on the client side, such as a corrupt installation or incorrect configuration.

  • Verify your Internet connection 🌐
    • Make sure your connection is stable. Try restarting your router or switching networks if possible.
    • Try using a wired connection instead of Wi-Fi for better stability.
  • Check the server configuration 🔧
    • Make sure the server is properly configured and not overloaded.
    • If you have access to the server, check the logs to detect possible issues.
  • Adjust Firewall or Antivirus settings 🔓
    • Add an exception for Minecraft in your firewall and antivirus. This will prevent them from blocking the connection.
    • Type "Firewall" in the Windows search bar.
    • Look for the following option:
      firewall

launcher options

  • Reinstall Minecraft or update Java ⬇️
    • Uninstall Minecraft and reinstall it to make sure there are no corrupt files.
    • Make sure you have the latest version of Java installed, as Minecraft depends on it.
  • Increase the Timeout in Minecraft ⏱️
    • You can try increasing the wait time (timeout) for connections in Minecraft by editing the server configuration files.

Conclusion

With these steps, we should have solved the error that was appearing. We hope this guide has been useful and remember, do not hesitate to ask on HolyHosting Discord or contact our support.

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Cheers!!🌟

Stuffy @ HolyHosting

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