Как исправить ошибку в майнкрафте internal exception java io ioexception

The Minecraft launcher may show the ‘Internal Exception Java.IO.IOException’ issue if the Minecraft installation is corrupt or outdated. Moreover, the corrupt DNS cache of the system or improper configuration of Java may also cause the issue at hand.

The issue arises when the user tries to join or connect a server but encounters the following message:

“Connection Lost Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host”

Before proceeding with the solutions to stop internal exceptions in Java IO IOException, check if trying another network cable (if using an ethernet connection) resolves the issue. If you have a long username (7+ characters), then check if reducing it to (7 or fewer characters) solves the issue. Also, check if your internet speed meets the minimum speed requirements of Minecraft. Moreover, make sure to log out/disconnect the Minechat (if using) and then close it. Additionally, check if launching the Minecraft launcher (or server) as an administrator resolves the issue.

Solution 1: Update the Minecraft Launcher to the Latest Build

You may encounter the internal exception issue if the Minecraft launcher of your system is outdated as it can create incompatibility between the launcher & server. In this context, updating the Minecraft launcher to the latest release may solve the problem. But before moving on, check if you have more than one account configured with the Minecraft launcher, if so, then remove all the other accounts but one.

1. Open the Minecraft launcher & near the username, click on the Options.
2. Then click on the Force Update button & apply the launcher update.
3. Once updated, relaunch the Minecraft launcher and check if it is clear of the IOexception error.
4. If not, check if using another launcher resolves the issue.

Solution 2: Clear the DNS Cache of Your System

The Java.io error may emerge if the DNS cache of your system is corrupt as it may lead to the system’s ability to resolve the domain name. In this context, flushing the DNS cache (which will force the system to re-fetch the combinations) may solve the problem.

1. Click Windows, type: Command Prompt, and right-click on the result of Command Prompt. Then choose Run as Administrator.
2. Now execute the following one by one:

   ipconfig /flushdns
   
   ipconfig /release
   
   ipconfig /renew

   

3. Then exit the Command Prompt and check if the Java exception issue is resolved.

If the issue persists, then check if changing DNS server (e.g., Google DNS) resolves the internal exception issue.

Solution 3: Disable Server’s Resource Pack

Resource packs allow the players to do a lot of customization (like textures, music, models, splash tests, etc.) but this customization may hinder the client/server communication and thus cause the IOexception issue. In this scenario, disabling the server’s resource pack may solve the problem.

1. Open the Minecraft launcher and select Multiplayer.
2. Then select the problematic server and click on Edit.
3. Now click on Server Resource Packs to set it to Disabled (if enabled) and click on Done.
4. Then check if the launcher is clear of the Java.io issue.

Solution 4: Uninstall the Conflicting Applications

You may encounter the Java.io issue if an application on your system is hindering the operation of Minecraft. In this scenario, removing the conflicting application may solve the problem. You can clean boot your PC to find out the problematic application. For illustration, we will discuss the process for the Hamachi VPN (reported by the users to cause the issue).

1. Right-click Windows & open Apps and Features.
2. Now click on LogMeIn Hamachi to expand it & then click on Uninstall.
3. Then follow the prompts to remove Hamachi & reboot your PC.
4. Upon reboot, check if the IOexception issue is resolved.

Solution 5: Decrease the Render Distance in the Minecraft Settings

The internal exception issue may arise if Minecraft could not render all the video blocks at once (due to the poor internet speed). In this context, decreasing the Render Distance in the Minecraft settings to the lowest possible may solve the problem.

1. Open the Minecraft Launcher & open its Options (it will be also a good idea to lower the Render Distance in the server settings, if possible).
2. Now select Video Settings & slide the Render Distance to the lowest possible (e.g., to 2).
3. Then check if the Java.io issue is resolved. If so, then you may increase the Render Distance by one till you reach your desired Render Distance.

Solution 6: Edit the Java Settings

The Java.io error may arise if the Java installation of your system is not properly configured. In this context, editing the Java settings (like enabling the Native Sandbox) may solve the problem. But before proceeding, make sure you have only one Java installation.

Update Java to the Latest Build

1. Click Windows, type: Configure Java & then open it.
2. Now steer to the Update tab & click on the Update Now button.
3. If an update is available, apply the Java update & check if the internal exception issue is resolved.

Enable Native Sandbox

1. Click Windows, type: Configure Java & open it.
2. Now steer to the Advanced tab & checkmark Enable the Operating System’s Restricted Environment (Native Sandbox).
3. Then apply your changes & reboot your PC.
4. Upon reboot, check if the Minecraft IOexception issue is resolved.

Edit the Java Path in the Launcher Settings

1. Right-click Windows & open Run.
2. Now navigate to the following path:

   Program Files (x86)

   

3. Then open the Java folder & steer to the latest version of the Java installation (e.g., the jre1.8.0_291 folder).
4. Now open the Bin folder & copy the address from the address bar.
5. Then open the Minecraft Launcher & select Edit Profile.
6. Now, under Java Settings (Advanced), checkmark the option of Executable.
7. Then paste the address (copied at step 4) up to Bin, so the path should be something like below:

   C:Program Files (x86)Javajre1.8.0_291binjavaw.exe

   

8. Now apply your changes & check if the internal exception issue is resolved.

If the issue persists, then check if reinstalling Java sorts out the IOexception issue.

Solution 7: Repair / Reinstall the Minecraft

The Java.io issue may arise if the Minecraft installation is corrupt. In this context, repairing or reinstalling it may solve the problem.

1. Click Windows, type: Control Panel, & launch it.
2. Now open Uninstall a Program & select Minecraft.
3. Then click on Repair & follow the prompts to repair Minecraft.
4. Now reboot your PC & check if the IOexception issue is resolved.
5. If not, uninstall Minecraft & Java (make sure to back up the essentials).
6. Now reboot your PC & upon reboot, right-click Windows & select Run.
7. Then navigate to the following path (copy-paste the address):

   AppData

   

8. Now open each directory (Local, LocalLow, & Roaming) one by one & delete the Minecraft folders in them.
9. Then download the latest versions of Java & Minecraft.
10. Then install Java as administrator & reboot your PC.
11. Upon reboot, install Minecraft as administrator & check if the internal exception issue is resolved.

Solution 8: Edit the Network-Related Settings

Minecraft may show the internal exception issue if the network settings of your system are not properly configured (or your ISP is blocking access to a resource essential for the operation of Minecraft). In this case, editing the network settings (or trying another network/VPN) may solve the problem.

Try Another Network or a VPN

1. Disconnect your system from the current network & connect to another network e.g., the hotspot of your phone to check if the IOexception issue is resolved. You can also check by using a VPN. Also, it will be a good idea to switch between the Wi-Fi and ethernet connection.
2. If the issue persists, directly connect the system to the internet without the router to rule out if its configuration causing the issue.

Disable NAT Acceleration in the Router’s Settings

1. Launch a web browser & navigate to the Router’s control page.
2. Now select LAN (in the left pane) & disable Hardware Acceleration in the Switch Control tab. If the Hardware Acceleration (the Asus branded router feature) is not shown, look for it with different names like CTF (Cut-Through Forwarding) & FA (Flow Accelerator).
3. Then apply your changes & check if the internal exception issue is resolved.

Solution 9: Edit the Firewall Settings

You may encounter the internal exception issue if the Firewall of your system is blocking access to a resource essential for the operation of Minecraft. In this context, editing the Firewall settings (like allowing Java (TM) Platform SE Binary in the Firewall settings) may solve the problem. Before proceeding, it will be a good idea to check if temporarily disabling the firewall of your system resolves the issue. For illustration, we will go through the process for the Windows Defender Firewall.

Warning: Advance at your own risk as editing the firewall’s settings is a skillful task & if done wrong, you may expose your system/data to threats.

Set Java (TM) Platform SE to Private in the Firewall Settings

1. Click Windows, type: Allow an App Through Windows Firewall, & open it.
2. Now click on Change Settings & in the list of Apps, find Java (TM) Platform SE Binary. If it is not present, click on Allow Another App & steer to the installation directory of Java (usually, the Java directory of Program Files and Program Files (X86) folders) and double-click on Javaw.exe.
3. Then uncheck the option of Public and checkmark the option of Private for all the Java (TM) Platform SE Binary processes.
4. Now select Java (TM) Platform SE Binary & click on Details.
5. Then open Network Type and checkmark Private.
6. Now apply your changes & reboot your PC.
7. Upon reboot, check if the IOexception issue is resolved.

Allow the Minecraft Through the Firewall

1. Click Windows, type: Firewall, & open Windows Defender Firewall.
2. Now make sure no Inbound and Outbound rules related to Minecraft are set to Block the Connection.
3. Then select Inbound Rules & click on New Rule.
4. Now select Program & click on Next.
5. Then click on Browse & steer to the installation directory of Minecraft.
6. Now double-click on Minecraft.exe & select Allow the Connection.
7. Then click on Next & select all the three profiles (i.e., Public, Private, & Domain).
8. Now name the rule & click on Finish.
9. Then repeat the same for the Outbound Rule & reboot your PC.
10. Upon reboot, check if the Java.io issue is resolved.

If the issue persists, check if allowing the Minecraft connections through the router’s Firewall (if any) resolves the issue (especially, if it is using some autoblocking feature). If that did not do the trick, check if the parental controls are not restricting the Minecraft access. Also, it will be a good idea to ensure that the ports are properly forwarded in the system/router firewall as required by Minecraft.

If the issue persists, check if allocating more RAM to Minecraft solves the problem. If that did not do the trick, you may contact the server’s admins to delete your player data or check for a server-side problem. If the issue did not resolve so far, you may have to perform a factory reset of your PC & if that did not do the trick, get your system (especially, hard disk and network/Wi-Fi card) checked for a hardware error.

Few things are as frustrating as running into error codes, especially when you have no idea what the problem might be.

What kind of error is: Internal Exception: java.io.ioexception

Simply put it is an internet connection error. Your computer is trying to establish a connection to the Minecraft server you have chosen and that connection gets interrupted while traveling between the server and your computer.

What is the solution to this error?

Let’s start solving this problem with some basic solutions that work for almost any error. Do not skip these unless you have already tried them, because these are the simplest solutions that take the least amount of time!

1. Power cycle your Router, by unplugging it for a minute and then plugging it back in to start again.
2. Restart your computer.
3. Restart Minecraft.

Those are basic steps that will let us figure out if your problem is temporary, or comes from a larger issue that will need more troubleshooting. If these didn’t help it is time to try some of the more advanced steps.

Advanced Troubleshooting

If the basic steps above didn’t work for you, it’s probably time to look at more advanced solutions.

Uninstall and reinstall a fresh version of Minecraft

One of the biggest culprits with Minecraft issue is … Minecraft itself. Before you do anything too advanced to try and solve this problem, try to uninstall the game and reinstall it fresh. Do not reinstall any texture packs, mods, or Optifine yet. Try connecting to the server with the base game and see if it solves your problem.

Enabling the Java Native Sandbox

The Java Native Sandbox lets you start Java applications such as Minecraft in a restricted environment that might bypass whatever is causing the issue with your connection to the server. You can enable it with the following steps:

1. Go to the search bar on the Windows Task Bar, usually at the bottom of your screen, and type in “Control Panel” and click on the entry that pops up.
2. Find a section with a header “Programs” and click on that header.
3. On the following screen you should see an icon for “Java”. Click on the header. We have marked the Java header and icon in red in the below graphic.
4. You should now have a small pop up labeled “Java Control Panel”. In it switch to the “Advanced” tab and start scrolling down until you see a section labeled “Advanced Securrity Settings”. We have marked this section in red in the graphic above.
5. Here you will find an option for “Enable the operating system’s restricted environment (native sandbox)”. Make sure it is checkmarked, then click “Apply” and then click “OK”.
6. It is very important that you now restart your computer, so that the changes can take effect.

After restarting your computer, start up Minecraft again and see if the connection to the server now holds. If it doesn’t, feel free to disable the native sandbox again for the sake of not adding more parameters to the problem you’re trying to track down.

Changing the DNS on your router to the Google DNS servers

Your internet service provider might have temporary issues with its DNS server, preventing your computer from finding the server you are connecting to. You can find your DNS settings in your router/modem administration panel and it will usually be set automatically.

Almost all routers will allow you to switch DNS servers to the ones you specify manually, usually two of them. You should enter the following values:

• Primary DNS Server: 8.8.8.8
• Secondary DNS Server: 8.8.4.4

The new DNS server settings will connect to Google’s own servers whenever it is trying to connect to something from your computer, and this tends to be a lot more reliable over time than whatever your local internet service provider will give you. Even if this solution doesn’t work, it is probably a good thing for you to keep the new settings.

Conclusion

Hopefully this solution helped you fix the Internal Exception: java.io.ioexception error and let you get back to playing Minecraft. If not then you might want to take to the Minecraft Forum to find some more information.

Technology has contributed to the creation of new modern games and the updates of existing games. Gaming used to be primarily for entertainment, but technological improvements have extended consumers’ views on the subject.

Minecraft is currently one of the most popular and engaging games. Minecraft is an objective video game that encourages players to use their imaginations to achieve a particular objective. Many children have become engrossed in the game due to its numerous exciting features.

However, as fascinating as Minecraft is, it may not be easy to access. This is true for any built applications or websites, not only Minecraft. Internal Exception java.io.ioexception does not suggest a serious problem with the game.

However, explicit knowledge of its genuine meaning is essential to judge the severity of the issue. On the other hand, this page addresses java.io.ioexception concerns in Minecraft games.

Mojang used Java to create the Minecraft video game. When playing Minecraft, there will be some instances when you might experience specific errors, much like using other applications. On the other hand, this is not unusual, as various factors can trigger it.

Causes of the Minecraft Error Internal exception: java.io.ioexception

The following reasons can cause this Minecraft Error:

1. Weak/intermittent internet connection.
2. Low storage on the hard drive.
3. The anti-virus application is blocking Minecraft and other files associated with the game.
4. Minecraft does not have permission to access/make changes to its files.
5. Minecraft files are missing/corrupted.

Troubleshooting Methods to Fix the Minecraft Error Internal exception: java.io.ioexception

Before you make changes in the settings of Minecraft or your system, you have to ensure that error is not from any external causes. Here are some basic troubleshooting steps that you can perform that might save you time and effort.

Reboot Your Internet Router

Rebooting your router will clear your connection settings, stop malicious network attacks, and remove any unauthorized connections from your network. Restarting your connection will also fix various speed and connectivity issues, such as the Minecraft internal exception error.

Reboot Your Computer/Device

When you restart a computer, all device drivers are unloaded, all programs are closed, and the operating system is restarted. In the course of regular usage or as a troubleshooting procedure to remedy a problem, you may need to reboot your computer, and both Windows and Mac OS provide options for you to do so fast.

Reinstall a Fresh Copy of Minecraft

If the above steps do not work for you, try this next. Uninstalling the current version of Minecraft from your computer and installing a fresh copy of the game may solve the error.

1. Hold down the “Windows + R” keys on your keyboard, type in “appwiz.cpl” on the run command line, and press “enter.”

1. In the list of applications, look for Minecraft and click uninstall.

1. While waiting for the process to complete, go to Minecraft’s official website to download a fresh installer by clicking here. Select the appropriate installer version for your computer.

1. Once Minecraft has been removed, go to the installer file of Minecraft and install the application as usual. Install a fresh copy of Minecraft, launch the game, and see if the error message has been fixed.

Temporarily Disable Windows Defender

In some cases, Windows Defender will quarantine files that aren’t harmful. These files are referred to as “false positives.” If a Minecraft file is recognized as a false positive, the program may fail to function correctly, resulting in a crash. To see if Windows Defender is the issue, turn it off momentarily.

1. Open Windows Defender by clicking on the Windows button, type “Windows Security,” and press “enter.”

1. Click on “Virus & Threat Protection” on the Windows Security homepage.

1. Under Virus & Threat Protection Settings, click “Manage Settings” and disable the following options:

• Real-time Protection
• Cloud-delivered Protection
• Automatic Sample Submission
• Tamper Protection

Recommended: Fortect System Repair Tool – Fix Errors & Speed Up Windows Automatically

Add Minecraft to the Windows Defender Whitelist

If Minecraft appears to work after disabling Windows Defender, that suggests Windows Defender is preventing or quarantining Minecraft files. You must now add the Minecraft folder to Windows Defender’s whitelist or exception folder.

This implies that Windows Defender will not block or put any files in quarantine in the Minecraft folder, whether old or new.

1. Open Windows Defender by clicking on the Windows button, type “Windows Security,” and press “enter.”

1. Under the “Virus & Threat Protection Settings,” click on “Manage Settings.”

1. Click on “Add or Remove Exclusions” under Exclusions.

1. Click on “Add an exclusion” and select “Folder.” Choose the “Minecraft Launcher” folder and click “select folder.”

1. You can now enable Windows Defender and open Minecraft to check if the Minecraft internal exception error message has been fixed.

Allow Minecraft Through the Firewall

If your Firewall blocks Minecraft, it may lead to the Minecraft Error Internal exception: java.io.ioexception. Here’s how to get Minecraft to work around your Firewall.

1. Hold down the “Windows + R” keys on your keyboard and type in “control firewall.cpl” in the run command line.

1. In the Firewall window, click on “Allow an app or feature through Windows Defender Firewall.”

1. Click on “Change Settings” and put a check on both “Private” and “Public” for all apps with the name “javaw.exe,” “Minecraft,” and “Java Platform SE Binary.”

1. If you cannot see the “Minecraft” application on the list, click on “Allow another app.”

1. Click on “Browse,” go to the folder of Minecraft and select “Minecraft Launcher,” and click “Add.” Once it has been added, you will be brought back to the main window of Windows Firewall; click “OK” to complete the steps.

1. Once you have completed all the steps, launch Minecraft and see if the Minecraft Internal exception: java.io.ioexception error.

Wrap Up

There might be multiple reasons why Minecraft players would encounter the Minecraft Error Internal exception: java.io.ioexception, but most of these causes can easily be fixed by performing their corresponding troubleshooting methods.

Frequently Asked Questions