[100% Fix] Minecraft io.netty.channel.abstractchannel$annotatedconnectexception

Written By Steven Arends

Among 90 Million players, 20% of people cannot connect to Minecraft servers. Reports show that they fail to connect to the server because of a time-out error.

I have also been through this situation, man! But, with a hefty 9 hours of non-stop research, I came up with the seven easiest steps to fix the Minecraft io.netty error message.

What does io.netty.channel.abstractchannel$annotatedconnectexception mean?

Io.netty.channel in Minecraft is a Connection Timed Out Error where you cannot connect to a game server due to lack of connection between the host and the server. The leading cause for the error is the Common IP Connectivity issue.


Keep Reading, As I will demonstrate to you why Minecraft fails to connect to the server and how to fix io.netty.channel.abstractchannel annotatedconnectexception connection immediately.

Follow our guide on how to Keep Inventory When You Die in Minecraft

How to Fix io.netty.channel.abstractchannel$annotatedconnectexception in Minecraft

Connection timed out is not limited to a single server. If you tried to join the multiplayer server, you will most often see the error message. As I have mentioned earlier, the root cause behind the io netty.channel error is the IP Connectivity issue.

A couple of other causes include Backdated JAVA program, server blocking by the Windows Firewall, and Unstable Software.

Due to the wrong IP of the port, io.netty.channel.abstractchannel Minecraft error can be triggered in no time. It is seen that the IP address attached with the correct port is used for forwarding your connection to the client server. In rare cases, the IP changes from time to time, and multiple users might get connected within the same IP.

Check out our separate post if Minecraft keeps crashing on your PC.

In the beginning, it may seem complicated to you. But, keep reading as you can fix Minecraft’s abstract channel error in minutes without any confusion.


Here are the steps to fix minecraft io.netty.channel.abstractchannel$annotatedconnectexception connection refused error:

1. Add Exceptions to Firewall Settings in Minecraft Folder

Adding exceptions in Firewall settings is the best option for fixing io.netty.channel.connecttimeoutexception connection timed out. As I have mentioned earlier, VPN and Windows Firewall sometimes block you from accessing the Minecraft game server. Add some exceptions in the Firewall to avoid abstractchannel annotatedconnectexception connection refused error.

Also, check out my complete Minecraft biomes list to explore the unknown. You can quickly find any biomes using the Minecraft Biome Finder. You can see biomes, jungle temples, slime chunks, spawn chunksburied treasures, etc. with different colors on the map.

Here are the steps to add exceptions to Firewall Settings:

  • Go to the Windows search bar and type Windows Security.windows-11-security
  • Navigate to Windows Security in the left pane and then select Firewall & Network Protection option.windows-11-firewall-and-security
  • Move down and select Allow an App through the Firewall option.allow-an-app-through-firewall
  • Click the Change Settings option.
  • Select the Allow another app option again.allow-another-app-through-firewall
  • Browse to the game installation directory folder and choose the launcher executable.
  • Repeat Steps 5&6 again but this time, browse to the directory folder in which you have the servers of Minecraft installed.
  • Open the Minecraft servers folder maxwell (Minecraft Server folder).
  • Repeat the process and allow the Java executables located inside the folder.
  • Repeat step 4 and instead of clicking Allow another app, simply scroll down to the list of Java Platform SE Binary.
  • Allow all the Java Platform SE Binary options both by Private and Public networks.

Now, you can open the Minecraft launcher to see if the error is solved or not.

Point to be Noted: Due to LAN issues, Minecraft Lan io.netty.channel.abstractchannel$annotatedconnectexception disconnection can occur. Check out our separate post to fix Lan not working in Minecraft.

2. Delete Unstable Software 

There is some unstable software, which after installing it on your computer will conflict with the game. You can check the list of the software that isn’t compatible with the Minecraft game on many websites.

You should remove false plugins and add 100% authenticated plugins only.

One of the incompatible software is the Virtual Ethernet with Hamachi. In this case, it would be wise enough to disable or delete the software.

Open Command prompt and type ipconfig. Find a configuration named Virtual Ethernet Connection with Hamachi. Note down the Addresses and go to the search panel to delete Virtual Ethernet Software with Hamachi.

Add your IP and port number to the server and solve Minecraft ionetty issue. If you are trying to play with your friends, you can set up a Hamachi server too.

Also, check out the best Minecraft Music Bots and the Best VPN for Minecraft.

3. Add IP Address and Select the Suitable Working Port

Add your IP and port number to the Minecraft servers. Minecraft connection refused issues will occur if the IP address and port you are using are dynamic in nature. Change your IP address and add it to the Minecraft Launcher in order to deal with minecraft.io error. I recommend using the port forwarding method.  You can also check your IP configuration from the command prompt.

Here are the steps to add an IP Address and select the suitable working port:

  • Run the Command Prompt as Administrator.
  • Type the command ipconfig and note down your IPV4 Address.
  • Browse to Minecraft Servers folder > Maxwell (Minecraft Server folder) > Minecraft Server at the same time and open Server Properties text document.
  • Note down the Server Port and open up Minecraft and go to the Play Multiplayer option.
  • Select the server you want to join and select Edit.
  • Type the IPv4 address and click Done. Connect to a server using this IPv4 address.
  • Refresh to apply changes.

NB: You can use the Minecraft Resolver tool as well to repair Minecraft out of memory problems.

You should check out the easiest way to make paper in Minecraft.

4. Reset Your Internet Router

Resetting the router is the most straightforward solution. If your Internet Modem/router causes problems then you are most likely to notice Minecraft error. You should always check your internet connection before trying to connect to the server.

Try powering off your Router by pressing the reset button for a couple of minutes and power back on to restart your Router. If that doesn’t work then reset all the settings of your router and set it up freshly. Try to connect to a server after resetting the router.

Remember: Poor internet connection hampers the data exchange between the server and the host. Also, The game server you are trying to connect needs to be in the same region.


Did you know? You can use the Command Block to execute the commands in Minecraft.

5. Use a Trusted VPN Connection Source

It is possible that Minecraft is banned in your region. Windows Firewall sometimes blocks Minecraft servers and for this reason, you will not be able to connect to the server. The same goes for VPN. Changing servers frequently using VPNs may block the Host server.

You can try using trusted VPN apps that don’t block your Minecraft game server. Simply change settings of the region to overcome io.netty.channel.connecttimeoutexception timed out error.

Want to make a Jack o lantern in Minecraft? Click on the link to find out.

6. Update Java software

Minecraft requires the latest version of JAVA in order to work properly. You can’t use backdated java software. If you are trying to connect to the server with outdated Java, the missing elements will conflict with Minecraft. As a result, you will see java.net.connectexception connection refused no further information.

Java.net.connectexception connection timed out no further information error is seen on windows 10 more specifically. A Learn to Mod account is necessary to join a Minecraft server. Java.net connectexception minecraft error means that you do not have any Learn To Mod account. It can be fixed by updating the JAVA software to its current latest version.

7. Reinstall Minecraft

This error can occur on both single-player and multiplayer servers. Use a trusted VPN to get rid of the Abstract Channel Error.

Sometimes your Game data is seen corrupted and it causes you a lot of problems like Minecraft disconnection error. Uninstalling Minecraft and simply giving it a fresh installation will help all the Minecraft players.

To uninstall Minecraft, you need to navigate to Control Panel> Uninstall a Program> select Minecraft to uninstall.uninstall-control-panel

Get the latest version of Minecraft and try to connect to the game server to fix io netty channel abstractchannel annotatedconnectexception.

Why does it say IO Netty channel AbstractChannel AnnotatedConnectException?

Minecraft says io netty annotated error because of a lack of connection between host PC and the server. Basically, Minecraft can’t connect with the server due to unwanted traffic off networks. Try the Port forwarding method to get rid of the disconnection problem.

Port forwarding is necessary because your Home routers use NAT which isolates the home network from the Internet. If you want you can also fix your LAN card. Apart from that, if you have any antivirus installed, I would suggest you whitelist Minecraft. JRE Blocked by Antivirus can cause a serious issue leading to this problem.

Quickly check out how to deal with a Minecraft server not allowing friends to connect.

Final Thoughts

Connection refused: no further information error is a big problem for Minecraft fans. If you are able to fix failed to connect to server error once, then you will never face this error again. In case, if none of the above steps worked for you then I would suggest you fix your LAN card to see if this error vanishes or not.

About The Author
Steven Arends is a computer science graduate and tech enthusiast with over 10 years of experience in the field. He has a vast collection of computer hardware and loves exploring the latest advancements. As a contributing author to 10Scopes, Steven shares his expertise to make the world of technology more accessible and easier to understand for all readers.

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