How to Fix io.netty.channel Minecraft Error

Trying to fix Minecraft ‘io.netty.channel.AbstractChannel$AnnotatedConnectException’ error on your computer? 

Minecraft was first introduced in 2009 as a sandbox game that allows you to create and modify worlds to simulate different scenarios that you can ever think of. It really has come a long way from when it was first introduced and has added features that improved the game through the years. 

One of the best features of Minecraft is the ability to play with other users by joining a server or creating one for yourself. However, there have been reports from the community about users who are having a hard time joining different servers which makes it difficult for them to enjoy the game in multiplayer mode. 

Lucky for you, we are here to help. Today, we are going to show you a few methods that you can execute on your computer to fix the io.netty.channel error when joining a server on Minecraft.

Let’s get started. 

• 1. Restart Minecraft.
• 2. Restart Your Computer.
• 3. Restart Your Router (Power Cycle).
• 4. Allow Minecraft and Java on Your Firewall.
• 5. Use Port Forwarding.
• 6. Verify Your IP Address and Port.
• 7. Contact Your ISP and Use VPN Service. 

1. Restart Minecraft. 

For the first method, what you can try doing is to restart the game using the Task Manager. 

It is possible that Minecraft encountered a temporary glitch while running or its resources were not loaded properly the first time you launch the game, which causes the io.netty error message. 

Check out the steps below on how to restart the game using the Task Manager. 

1. On your keyboard, press and hold the CTRL + ALT + DEL key to open the selection menu. 
2. Now, click on the Task Manager to launch it. 
3. Inside the Task Manager, find Minecraft from the list of programs running on your computer and click it. 
4. Lastly, hit the End Task button to stop it from running on your computer. 

Once done, launch Minecraft once again on your Desktop and try to join a server on the game to see if the io.netty.channel error message would still occur on your system. 

2. Restart Your Computer. 

If you are unable to resolve the issue by restarting Minecraft, you can try restarting your computer instead.

Your system might have encountered a bug or error that is related to your network, which causes Minecraft to encounter problems when joining a server on the game. 

Restarting your computer would allow your system to reload its resources which eliminates any temporary bugs or glitches that occurred while your computer is running. 

To restart your computer, check out the steps below. 

1. On your keyboard, hit the Windows key which is in the lower-left portion to open the Start menu. 
2. Once the Start menu is opened, click on the Power button to open the Power Options.
3. Lastly, click on Restart to begin rebooting your operating system. 

Wait for your computer to finish restarting, then go back to Minecraft and try to join a server once again to see if the problem with the game is already resolved. 

However, if you are still seeing the io.netty.channel error message when joining a server, you can try doing the next method below to fix the issue. 

3. Restart Your Router (Power Cycle). 

The problem with connecting to a Minecraft server can also be related to a problem with your internet connection. If your internet connection is unstable or running slow, then Minecraft would have a hard time communicating with its servers which causes it to encounter error messages. 

To fix this, you can try restarting your router to refresh its connection with your ISP (Internet Service Provider). 

1. First, go to your internet router and locate its power cable. 
2. Next, remove the power cable from your router to turn it off. 

3. Lastly, wait for at least 5-10 seconds before plugging back the power cable on your router to allow it to rest. 

After power cycling your router, go back to Minecraft and try to join a game server once again to see if the problem with connecting to a server is already fixed. 

4. Allow Minecraft and Java on Your Firewall. 

In some cases, your firewall might be the reason for the io.netty.channel error message on Minecraft. Windows Firewall might be blocking the game from accessing your internet connection as the game attempts to join a public server. 

To bypass this, you should allow Minecraft and Java from communicating through your firewall to avoid any conflicts between the two.

1. On your computer, press on the Windows key + S and search for Windows Firewall. 
2. Next, click on Open to launch it. 

3. Inside Windows Firewall, click on ‘Allow an App or Feature Through Windows Firewall’. 

4. Lastly, make sure that Java and Minecraft are checked from the list of apps that are allowed on your firewall. Click on Ok to save the changes afterward. 

Now that you are done, restart your computer and try to join a Minecraft server once again to see if the ‘io.netty.channel.AbstractChannel$AnnotatedConnectException’ error message on the game is already resolved on your computer. 

5. Use Port Forwarding. 

Minecraft uses the port 25565 on your computer to access the internet and to connect to various servers on the game. However, it is possible that this port is closed on your computer, which causes Minecraft to not function normally. 

To fix this, you can try using port forwarding on your firewall so that port 25565 would always be available for Minecraft to use. 

1. On your keyboard, press on Windows key + S and search for Windows Firewall. 
2. Next, click on Open to launch it. 

3. Inside the Windows Firewall, click on Advanced Settings. 

4. After that, click on Inbound Rules and hit the New Rule button. 

5. Now, select Ports from the selection and hit the Next button. 
6. Make sure that TCP is selected and click on Specific Local and type 25565 on the dialog box. 

7. Lastly, click on Next and make sure that Allow Connection is selected, then follow the prompts to save the changes. 

Repeat the process above but this time on Outbound Rules. Once you’re done, restart your computer and open Minecraft once again to see if the error message would still occur when you join a server on the game. 

6. Verify Your IP Address and Port

If you are using a dynamic IP Address which most users are, then your IP would change every couple of days depending on your ISP. In this case, your server’s IP would not match your computer’s IP, which will cause the io.netty.channel error on Minecraft. 

To fix this, you can manually reconfigure your server’s IP configuration to match your computer’s new IP Address. Check out the steps below to guide you through the process. 

1. On your computer, press on Windows key + S and search for Command Prompt. 
2. Now, click on Run as Administrator to launch it. 

3. Inside Command Prompt, type ipconfig and hit Enter. Take note of your IPV4 Address. 

4. After that, navigate to Minecraft Servers > Maxwell (random numbers)> MinecraftServer and open the Server Properties text file. 
5. On the Server Properties text file, take note of the port that you are using which is usually 25565.
6. Lastly, go back to your Minecraft server and click on Edit. Enter your IPV4 Address, followed by the port that you are using. Follow the format below to make it easier for you.

 XXX.XXX.X.X:25565

Restart the Minecraft launcher and try to connect to your game server once again.

On the other hand, if you are still having issues with Minecraft when joining a server, you can proceed to the last method below to fix the issue on your computer. 

7. Contact Your ISP and Use VPN Service. 

In some regions and countries, there are rules and regulations followed by your ISP (Internet Service Provider) that mandates them in blocking several IP Addresses and websites from other countries that may have conflicts with your region or country. 

To verify this, we strongly suggest that you contact your ISP and ask them if they are indeed blocking sites and IP addresses from other regions which may include the current server that you are trying to join. 

If this is the case with your ISP, you can try using a VPN service on your computer which bypasses these restrictions set by your ISP so that you can continue playing Minecraft on your preferred server. You can also check out our list of the best VPN services that you can use, which also works well if you want to watch US Netflix from other regions outside the US. 

This ends our guide on how to fix the ‘io.netty.channel.AbstractChannel$AnnotatedConnectException’ error message on Minecraft. If you know other solutions besides the methods mentioned above, kindly share it in the comment section below, and we would give credit to your name once this article gets updated. 

If this guide helped you, please share it. 🙂