Reason of Flutter error: SocketException: Failed to create server socket (OS Error: Failed to start accept), address = localhost, port = xxxx

Question

When I Run flutter run -d chrome command (ref), get the Failed to start accept error:

SocketException: Failed to create server socket (OS Error: Failed to start accept), address = localhost, port = 6670

Additional info:

flutter channel => beta

How can I solve it?

Answer 1

OK, this is also my issue and I manage to find a workaround

1. on cmd run "ipconfig"

2. after running the "ipconfig" get the value of IPv4 Address.

3. then on the app run:

   flutter run -d chrome --web-port=8080 --web-hostname= *the value of IPv4 Address*
   

Answer 2

Go to Network LAN Properties -> Deselect the IPv6 Connectivity -> Click Ok. Its Works for me.

Answer 3

Internet permission

The issue has to do with the app's "Capabilities". You need to allow "Outgoing Connections (Client)".

The .entitlements file should have this:

    <key>com.apple.security.network.client</key>
    <true/>

For AndroidManifest.xml it is:

<uses-permission android:name="android.permission.INTERNET"/>

Here's in Xcode:

Answer 4

In my case, i just had installed the release app, which has different signature, I guess, so I just had to uninstall it from the emulator, then debug and everything worked out just fine.

Answer 5

Go to your PowerShell run as administer run following commond

1.net stop hns

2.net start hns