How To Fix Internal Exception: java.io.ioexception In Minecraft [SOLVED]

Minecraft is all fun and interesting until it starts annoying you with errors. The Minecraft “Internal Exception: java.io.ioexception” error is one of the major connection errors in this game. If you are here for the same reason, then this post will help you out.

Minecraft is one of the most widely played games right now. It has millions of active monthly users who have fun while playing games on Minecraft. There are two modes in Minecraft namely Survival and Creative. Both are fun and interesting to play.

How to Fix Internal Exception: java.io.ioexception in Minecraft

One can play alone or join a multiplayer mode game in Minecraft. However, when the players are trying to join in the realm, an error code appears out of nowhere. The “Internal Exception: java.io.ioexception” error shows up with the message “Connection lost”. To know how to fix it, read below.

How To Fix Internal Exception Java.io.ioexception In Minecraft

The Internal exception java.io.ioexception Minecraft error can appear due to various reasons. A lot of users have encountered this error when they try to join a realm in Minecraft. If you are getting this error, then the reason could be your Firewall, software bugs, and network issues. Therefore, read below and easily fix the error.

1. Power Cycle The Router

Start with power cycling your router to fix the network issues on your device. If you get the Internal exception java.io.ioexception an existing connection was forcibly closed error, then this is the best option. Power cycle your router quickly by following the steps given below.

  • Make sure your router is turned on and press the power button.
  • Hold this button for at least 10 seconds so that the router turns off.

internal exception java.io.ioexception an existing connection was forcibly closed

  • Now, unplug the router from the power source and let it rest for 1 minute.
  • Next, plug in back the router and turn on the router.
  • Connect your PC to the wi-fi and check if Minecraft is working properly.

2. Change Server Side View Distance

If you are still getting the Minecraft internal exception java.io.ioexception error, then use this solution. Changing the server view distance for Minecraft is one of the proven ways to fix the error. A lot of users have tried this method and the error was resolved. Therefore, you can also try this by following the steps given below.

  • First of all, make sure the Minecraft servers are not running.
  • Now, open the “Files” option and go to the “Cong Files”.
  • Here, select the “Server Settings” option.

minecraft internal exception java.io.ioexception

  • Next, find “View Distance” from the given settings and set it to 4.
  • Then, click on the “Save” button to save the changes.
  • Now, launch Minecraft again and see if the Internal Exception error still appears.

3. Turn Off Windows Firewall

Disable the Windows Firewall since this is one of the major reasons for the Internal Exceptions Java error. If you are still getting the same error on Minecraft, then turn off the Windows Firewall. Therefore, follow the steps given below.

  • Press Windows+I keys to go to the Settings and click on “Update & Security”.
  • Now, select the “Windows Security” tab and click on “Firewall and network protection”.

internal exception java.io.ioexception minecraft

  • Next, choose the network that you are currently using from here.
  • Go to the Windows Defender Firewall and toggle the button to turn it off.
  • Exit the settings and check if the Minecraft error disappears.
  • If the error is fixed, disable Java Platform SE Binary.
  • For that, go to Control Panel and click on the “System Security” option.
  • From the left pane, click on “Allow an app or feature through Windows Defender Firewall”.

internal exception java.io.ioexception

  • Find “Java Platform SE Binary” files, and check them under “Private”.
  • Click on the “OK” button to save the changes. Launch Minecraft and check on the error.

4. Change DNS Server

Still, the Minecraft Internal exceptions java.io.ioexception error is appearing? If you are still getting the same error, then change the IPv4 DNS server on your device. For that, follow the steps given below.

  • Go to Control Panel and open the “Network and Internet” section.
  • Choose your type of connection, right-click, and select “Properties”.
  • Now, switch to the “Networking” tab in the given pop-up window.

internal exception: java io ioexception minecraft 1.15 2

  • Then, click on “Internet Protocol Version 4 (TCP/IPv4)” and select “Properties”.
  • Under “Use the following DNS server addresses:”, enter the DNS values.
  • Preferred DNS Server: 8.8.8.8 and Alternative DNS server: 8.8.4.4.
  • Click on the “OK” button to save the changes.

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5. Reinstall Java

If you are still getting the Internal exceptions java.io.ioexception error on Minecraft, then try this method. Reinstall the Java software on your device. For that, follow the steps given below.

  • Go to the Control Panel -> Programs -> Programs and features.
  • Click on the “Java” software from the list of installed apps.
  • Select the “Uninstall” option to uninstall Java.

internal exception java.io.ioexception realms

  • Once deleted, download the latest version of Java.
  • Now, launch Minecraft and try to join in a realm.
  • The error won’t appear again on your game.

6. Reinstall Minecraft

The last solution which is 100% working is uninstalling the game itself. If you are having the same problem with this error on Minecraft, then just delete the game. Then, you can download the game freshly again easily. To uninstall Minecraft on Windows, follow the steps given below.

  • Go to Control Panel -> Programs -> Programs and features.
  • Click on the “Minecraft” game file and select the “Uninstall” option.

how to uninstall minecraft

  • Confirm again to uninstall the Minecraft game.
  • Once finished, restart or reboot the PC.
  • Then, visit the Microsoft Store and download Minecraft’s latest version.

FAQs

What is Internal exception java.io.ioexception error in Minecraft?
The Minecraft error Internal Exception: java.io.IOException is a connection error on the game. It mainly occurs due to network issues, Firewall blocks, and other software bugs.
How to fix the Internal Exception Minecraft error?
Follow the simple methods given below to fix the Minecraft Connection Lost error.

  • Restart The Router
  • Change Server Side View Distance
  • Turn Off Windows Firewall
  • Change DNS Server
  • Reinstall Java
  • Reinstall Minecraft
Why is Minecraft showing An existing connection was forcibly closed by the remote host?
The Minecraft error Internal Exception: java.io.IOException is a connection error on the game. It mainly occurs due to network issues, Firewall blocks, and other software bugs.
How to fix connection errors on Minecraft?
Turn off the Windows Firewall on your PC to fix connection errors on Minecraft. Go to Start -> Settings -> Update & Security -> Windows Security -> Firewall and network protection. Select your network and turn off the “Windows Defender Firewall”.
How to uninstall Minecraft?
  • Go to Control Panel -> Programs -> Programs and features.
  • Click on the “Minecraft” game file and select the “Uninstall” option.
  • Confirm again to uninstall the Minecraft game.

Conclusion

The Internal Exception: java.io.ioexception is a connection error on Minecraft. If you are getting this error on your game, then it can be a network problem, corrupted game, or Firewall issue. Whenever you see this error on Minecraft, then don’t worry, and try the fixes given here. The Minecraft Internal Exception error will be fixed. To get more useful and updated posts from Lavrusik, keep visiting our website.

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