How to Solve “Internal Exception Java.IO.IOException” Problem on Minecraft

Last Updated on December 6, 2021



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Minecraft is one of the most popular video games of recent years and has managed to become an industry icon. For a long time, it has been fueled by content. In recent days, however, many players have encountered an “Internal Exception” error code that is preventing them from enjoying the game.

Minecraft players report that they get an “Internal Exception: java.io.ioexception” error message when trying to join a kingdom. If the error message appears, the game cannot continue.

What causes “Internal Exception Java.IO.IOException” on Minecraft?

According to the survey, the ‘java.io.ioexception’ error usually occurs when trying to join a sphere. The error can have many causes, such as an Internet connection, an antivirus or firewall blocking, and Minecraft itself. To solve the problem, you can restart your computer and then restart Minecraft. If a simple restart didn’t help, you can try the following methods.

How to resolve the ‘Java.IO.IOException’ problem?



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Disable the Windows Firewall

  1. Click Start and select Settings.
  2. Open Update and Security.
  3. Click on Windows Security.
  4. Scroll down and click on Firewall and Network Protection.
  5. Click on the currently active network.
  6. Select the switch to disable the Windows Firewall.
  7. After disabling it, run Minecraft to see if the bug has been fixed.

Change your IPv4 DNS address

  1. Press Windows + R to open Run.
  2. Type control and click OK.
  3. In the Control Panel, go to Network and Internet.
  4. Click Change map settings in the left pane.
  5. Right-click on the network adapter and select Properties.
  6. Scroll down and double-click Internet Protocol version 4 (TCP/IPv4).
  7. Select Use the following DNS server addresses.
  8. In the Preferred DNS server and Alternate DNS server fields, enter the following, respectively
    8.8.8.8
    8.8.4.4
  9. Click OK to save your changes.

Reinstall Java

  1. Press the Windows + R keys to open Run.
  2. Enter control and click OK.
  3. Click Uninstall the program.
  4. Select Java in the list of installed applications.
  5. Click the Uninstall button.
  6. When uninstall is complete, download and install the latest version of Java.
  7. Restart your computer and check if the situation has improved.

Reinstall Minecraft

  1. Press the Windows + R keys to open Run.
  2. Type appwiz.CPL and click OK.
  3. Select Minecraft from the list of installed applications.
  4. Click the Uninstall button. Click OK to confirm the action.
  5. After uninstalling, download the latest version of Minecraft and install it again.



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Frequently Asked Questions

It is an exception that programmers use in code to cause an error in input and output operations. It is a verified exception. The programmer should define IOException as a subclass and invoke the IOException subclass depending on the context.

  1. Disable the Windows firewall.
  2. Use a different DNS address.
  3. Reboot the network.
  4. Reinstall Java and Minecraft.

An IOException can be thrown either when the thread itself is corrupted or when a data reading error has occurred, such as security exceptions, authorization failures, etc., and/or a number of exceptions derived from IOEXception.