Xamarin
A Microsoft open-source app platform for building Android and iOS apps with .NET and C#.
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Network Subsystem Down Error in Xamarin Forms
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(224.00000000000003, 20%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESN%3C/text%3E%3C/svg%3E)
Subbu Naidu
11
Reputation points
I am getting "Network SubSystem Down " error in xamarin forms. i have updated all nuget packages after using application for 5mins it will throw exception.
i am adding exception Message below.
{System.Net.Http.HttpRequestException: Network subsystem is down ---> System.Net.Sockets.SocketException: Network subsystem is down
at System.Net.Http.ConnectHelper.ConnectAsync (System.String host, System.Int32 port, System.Threading.CancellationToken cancellationToken) [0x00180] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/ConnectHelper.cs:84
at System.Threading.Tasks.ValueTask1[TResult].get_Result () [0x0001b] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/CoreLib/System/Threading/Tasks/ValueTask.cs:813 at System.Net.Http.HttpConnectionPool.CreateConnectionAsync (System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) [0x000ea] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnectionPool.cs:385 at System.Threading.Tasks.ValueTask1[TResult].get_Result () [0x0001b] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/CoreLib/System/Threading/Tasks/ValueTask.cs:813
at System.Net.Http.HttpConnectionPool.WaitForCreatedConnectionAsync (System.Threading.Tasks.ValueTask1[TResult] creationTask) [0x000a2] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnectionPool.cs:543 at System.Threading.Tasks.ValueTask1[TResult].get_Result () [0x0001b] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/CoreLib/System/Threading/Tasks/ValueTask.cs:813
at System.Net.Http.HttpConnectionPool.SendWithRetryAsync (System.Net.Http.HttpRequestMessage request, System.Boolean doRequestAuth, System.Threading.CancellationToken cancellationToken) [0x0003f] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnectionPool.cs:284
at System.Net.Http.RedirectHandler.SendAsync (System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) [0x00070] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/RedirectHandler.cs:32
at System.Net.Http.HttpClient.FinishSendAsyncUnbuffered (System.Threading.Tasks.Task1[TResult] sendTask, System.Net.Http.HttpRequestMessage request, System.Threading.CancellationTokenSource cts, System.Boolean disposeCts) [0x000b3] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/System.Net.Http/src/System/Net/Http/HttpClient.cs:531 at Refit.RequestBuilderImplementation+<>c__DisplayClass14_02[T,TBody].<BuildCancellableTaskFuncForMethod>b__0 (System.Net.Http.HttpClient client, System.Threading.CancellationToken ct, System.Object[] paramList) [0x00158] in /_/Refit/RequestBuilderImplementation.cs:256
at LocobuzzApp.SchedulePost.ViewModel.SelectProfileViewModel.Profiles () [0x000d9] in D:\Rishi\Locobuzz App Working Copy\LocobuzzApp\LocobuzzApp\SchedulePost\ViewModel\SelectProfileViewModel.cs:434
source : mscorlib
Message : Network subsystem is down
Error code : 10050
socket error code : System.Net.Sockets.SocketError.NetworkDown
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(22.400000000000002, 3%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EWZ%3C/text%3E%3C/svg%3E)
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 26,626 Reputation points Microsoft Vendor2022-09-28T04:05:37.29+00:00 Hi @Subbu Naidu , the error only happens on Android, right? Have you enabled permissions for internet use?
<uses-permission android:name="android.permission.INTERNET" />And you could add break points in yourSelectProfileViewModeland check which method throws this error.
For further investigation, could you provide some code snippets and the nuget packages you are using so that I can test? As noted in the Q&A FAQ: How to write a quality question -
Subbu Naidu 11 Reputation points
2022-09-29T10:21:06.27+00:00 hi @Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) thanks for the reply. i have enabled internet permissions. in my case i am able to use application for some time after that it will throw exception.
i am using more than 10 api's in my app. some times it will throw at 5th api call. some times at 7th api call. it will throw randomly.And one more thing at least i am able to login in and use app for some time Android app, in ios it will throw exception in login page only.
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Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 26,626 Reputation points Microsoft Vendor
2022-09-30T02:50:12.22+00:00 You could check if the server side is stable, and check your IP. And is the error on iOS same as that on Android?
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