.NET Aspire Starter Application not working..

[newpost]

info: Aspire.Hosting.DistributedApplication[0]
      Aspire version: 8.0.0+d215c528c07c7919c3ac30b35d92f4e51a60523b
info: Aspire.Hosting.DistributedApplication[0]
      Distributed application starting.
info: Aspire.Hosting.DistributedApplication[0]
      Application host directory is: D:\03test\cs-demos\AspireApp1\AspireApp1.AppHost
fail: Aspire.Hosting.Dcp.dcpctrl.ServiceReconciler[0]
      could not start the proxy {"ServiceName": {"name":"cache"}, "Reconciliation": 4, "error": "cound not start the proxy for the service: listen tcp [::1]:61895: bind: Only one usage of each socket address (protocol/network address/port) is normally permitted."}
fail: Aspire.Hosting.Dcp.dcpctrl.ServiceReconciler[0]
      could not start the proxy {"ServiceName": {"name":"apiservice"}, "Reconciliation": 5, "error": "cound not start the proxy for the service: listen tcp [::1]:5457: bind: Only one usage of each socket address (protocol/network address/port) is normally permitted."}
fail: Aspire.Hosting.Dcp.dcpctrl.ServiceReconciler[0]
      could not start the proxy {"ServiceName": {"name":"webfrontend"}, "Reconciliation": 6, "error": "cound not start the proxy for the service: listen tcp [::1]:5279: bind: Only one usage of each socket address (protocol/network address/port) is normally permitted."}
fail: Microsoft.Extensions.Hosting.Internal.Host[11]
      Hosting failed to start
      Polly.Timeout.TimeoutRejectedException: The operation didn't complete within the allowed timeout of '00:00:10'.
       ---> System.Threading.Tasks.TaskCanceledException: A task was canceled.
         at k8s.Watcher`1.CreateWatchEventEnumerator(Func`1 streamReaderCreator, Action`1 onError, CancellationToken cancellationToken)+MoveNext()
         at k8s.Watcher`1.CreateWatchEventEnumerator(Func`1 streamReaderCreator, Action`1 onError, CancellationToken cancellationToken)+System.Threading.Tasks.Sources.IValueTaskSource<System.Boolean>.GetResult()
         at Aspire.Hosting.Dcp.KubernetesService.WatchAsync[T](String namespaceParameter, CancellationToken cancellationToken)+MoveNext() in /_/src/Aspire.Hosting/Dcp/KubernetesService.cs:line 209
         at Aspire.Hosting.Dcp.KubernetesService.WatchAsync[T](String namespaceParameter, CancellationToken cancellationToken)+MoveNext() in /_/src/Aspire.Hosting/Dcp/KubernetesService.cs:line 209

[davidfowl]

Can you share more about your environment:

• What OS you are using
• The output of dotnet --info
• What your launch settings for each project looks like:

cc @karolz-ms @danegsta

[s084088]

I have the same situation.
Just create a new project and no file has been modified

`
C:\Users\s0840>dotnet --info
.NET SDK:
Version: 8.0.300
Commit: 326f6e68b2
Workload version: 8.0.300-manifests.6751eab7
MSBuild version: 17.10.4+10fbfbf2e

运行时环境:
OS Name: Windows
OS Version: 10.0.22631
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\8.0.300\

已安装 .NET 工作负载:
[android]
安装源文件: SDK 8.0.300, VS 17.10.34916.146
清单版本: 34.0.95/8.0.100
清单路径: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.android\34.0.95\WorkloadManifest.json
安装类型: FileBased

[aspire]
安装源文件: SDK 8.0.300
清单版本: 8.0.1/8.0.100
清单路径: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.aspire\8.0.1\WorkloadManifest.json
安装类型: FileBased

[ios]
安装源文件: SDK 8.0.300, VS 17.10.34916.146
清单版本: 17.2.8053/8.0.100
清单路径: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.ios\17.2.8053\WorkloadManifest.json
安装类型: FileBased

[maccatalyst]
安装源文件: SDK 8.0.300, VS 17.10.34916.146
清单版本: 17.2.8053/8.0.100
清单路径: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.maccatalyst\17.2.8053\WorkloadManifest.json
安装类型: FileBased

[maui-windows]
安装源文件: SDK 8.0.300, VS 17.10.34916.146
清单版本: 8.0.21/8.0.100
清单路径: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.maui\8.0.21\WorkloadManifest.json
安装类型: FileBased

[tvos]
安装源文件: SDK 8.0.300, VS 17.10.34916.146
清单版本: 17.2.8053/8.0.100
清单路径: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.tvos\17.2.8053\WorkloadManifest.json
安装类型: FileBased

[wasm-tools]
安装源文件: SDK 8.0.300, VS 17.10.34916.146
清单版本: 8.0.5/8.0.100
清单路径: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.workload.mono.toolchain.current\8.0.5\WorkloadManifest.json
安装类型: FileBased

[wasm-tools-net6]
安装源文件: SDK 8.0.300, VS 17.10.34916.146
清单版本: 8.0.5/8.0.100
清单路径: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.workload.mono.toolchain.net6\8.0.5\WorkloadManifest.json
安装类型: FileBased

[wasm-tools-net7]
安装源文件: SDK 8.0.300, VS 17.10.34916.146
清单版本: 8.0.5/8.0.100
清单路径: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.workload.mono.toolchain.net7\8.0.5\WorkloadManifest.json
安装类型: FileBased

Host:
Version: 8.0.5
Architecture: x64
Commit: 087e15321b

.NET SDKs installed:
8.0.300 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.All 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.19 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.16 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.18 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.19 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.18 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.30 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.19 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

`

[davidfowl]

@karolz-ms @dbreshears can we look into ths?

[danegsta]

Based on the error messages in these reports, there's a very good chance that there's already a second copy of the application running. Only one usage of each socket address (protocol/network address/port) is normally permitted. is an error that's thrown when a port is already bound on the system. If it were a single conflicting port, it might be a random conflict, but the fact that multiple ports are conflicting is what makes me think it's likely multiple copies of the same app.

If this is still reproducing, can you double check that you don't have any other copies of your application running in the background?

[s084088]

I'm certain that I only started one instance of the program, as I have restarted my computer. Moreover, even when I manually change to a random port, the error still persists. I suspect there might be some reason causing it to start twice.

[danegsta]

Considering that the error screenshot references IPv6 addresses, I'm suspicious this is an IPv6 networking issue (likely the last entry in your hosts file for localhost is [::1], but your IPv6 network either has some particular firewall settings that are preventing us from binding addresses.

We've made some improvements that'll ship in 8.1 that will allow overriding the IP type (IPv4 vs IPv6) that is preferred for binding service ports. Once 8.1 ships, you can set the DCP_IP_VERSION_PREFERENCE environment variable to IPv4 or IPv6 to prefer a particular IP type for service bindings.

Since there isn't a specific repro for this issue and it's potentially down to specific machine configurations, I'm going to convert this to a discussion. If we're able to narrow it down to a specific set of repro steps, we can convert it back to an issue.

[jcbeck37]

We've made some improvements that'll ship in 8.1 that will allow overriding the IP type (IPv4 vs IPv6) that is preferred for binding service ports. Once 8.1 ships, you can set the DCP_IP_VERSION_PREFERENCE environment variable to IPv4 or IPv6 to prefer a particular IP type for service bindings.

Where do you set this value?

[karolz-ms]

It is an environment variable (OS concept), so depends on how you start the application. E.g. if running the application from Visual Studio, you can use a launch settings file.

[jcbeck37]

It is an environment variable (OS concept), so depends on how you start the application. E.g. if running the application from Visual Studio, you can use a launch settings file.

Thank you! I ended up setting NO_PROXY (system environment variable) for my local development which was the real fix for my issue.

[a764578566]

I have the same situation.

[newpost]

How did you solve it? @a764578566

[markat1]

I have experienced this - I often just reboot my computer, which makes it certain for me that the current instance goes away.

Probably not the best solution, but that's how I do it at the moment.

Then I make sure not to spin up an instance of my aspire right after each other, which gives it time to remove the current spunned instance.

[davidfowl]

And by this you mean this exact error?

[markat1]

sure looks like the same error I experience - something like "Only one usage of each socket address (protocol/network address/port) is normally permitted"

[davidfowl]

If you could paste the error message in here that would be helpful

[newpost]

After updating to 24h2, the problem was automatically fixed, damn it!