[android][arm64] System.Net.Sockets.Tests.SendTo_SyncForceNonBlocking.Datagram_UDP_ShouldImplicitlyBindLocalEndpoint fails with NetworkUnreachable

[kotlarmilos]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1167858&view=logs&j=11fc76eb-f2d5-5967-e9b4-f54329587f75&t=071fe9c1-8e24-5546-3854-e555c5768672
Build error leg or test failing: Datagram_UDP_ShouldImplicitlyBindLocalEndpoint

Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": "Network is unreachable",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

The test fails only on Android arm/arm64, on Android x64 and other platforms it passes.

The detailed failure:

1)   [FAIL] System.Net.Sockets.Tests.SendTo_SyncForceNonBlocking.Datagram_UDP_ShouldImplicitlyBindLocalEndpoint   Test name: System.Net.Sockets.Tests.SendTo_SyncForceNonBlocking.Datagram_UDP_ShouldImplicitlyBindLocalEndpoint
Exception messages: System.Net.Sockets.SocketException : Network is unreachable   Exception stack traces:    at System.Net.Sockets.Socket.UpdateStatusAfterSocketErrorAndThrowException(SocketError error, Boolean disconnectOnFailure, String callerName)
at System.Net.Sockets.Socket.SendTo(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, EndPoint remoteEP)
at System.Net.Sockets.Tests.SocketHelperArraySync.<>c__DisplayClass11_0.<SendToAsync>b__0()
at System.Threading.Tasks.Task`1[[System.Int32, System.Private.CoreLib, Version=10.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].InnerInvoke()
at System.Threading.Tasks.Task.<>c.<.cctor>b__288_0(Object obj)
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
2)    [FAIL] System.Net.Sockets.Tests.SendTo_SyncForceNonBlocking.Datagram_UDP_AccessDenied_Throws_DoesNotBind   Test name: System.Net.Sockets.Tests.SendTo_SyncForceNonBlocking.Datagram_UDP_AccessDenied_Throws_DoesNotBind
Exception messages: Assert.Equal() Failure: Values differ
Expected: AccessDenied
Actual:   NetworkUnreachable   Exception stack traces:    at System.Net.Sockets.Tests.SendTo`1.<Datagram_UDP_AccessDenied_Throws_DoesNotBind>d__8[[System.Net.Sockets.Tests.SocketHelperSyncForceNonBlocking, System.Net.Sockets.Tests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51]].MoveNext()
3)    [FAIL] System.Net.Sockets.Tests.SendTo_Apm.Datagram_UDP_ShouldImplicitlyBindLocalEndpoint   Test name: System.Net.Sockets.Tests.SendTo_Apm.Datagram_UDP_ShouldImplicitlyBindLocalEndpoint
Exception messages: Assert.NotNull() Failure: Value is null   Exception stack traces:    at System.Net.Sockets.Tests.SendTo`1.<Datagram_UDP_ShouldImplicitlyBindLocalEndpoint>d__7[[System.Net.Sockets.Tests.SocketHelperApm, System.Net.Sockets.Tests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51]].MoveNext()
4)    [FAIL] System.Net.Sockets.Tests.SendTo_Apm.Datagram_UDP_AccessDenied_Throws_DoesNotBind   Test name: System.Net.Sockets.Tests.SendTo_Apm.Datagram_UDP_AccessDenied_Throws_DoesNotBind
Exception messages: Assert.Equal() Failure: Values differ
Expected: AccessDenied
Actual:   NetworkUnreachable   Exception stack traces:    at System.Net.Sockets.Tests.SendTo`1.<Datagram_UDP_AccessDenied_Throws_DoesNotBind>d__8[[System.Net.Sockets.Tests.SocketHelperApm, System.Net.Sockets.Tests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51]].MoveNext()
5)    [FAIL] System.Net.Sockets.Tests.SendTo_MemoryNativeTask.Datagram_UDP_ShouldImplicitlyBindLocalEndpoint   Test name: System.Net.Sockets.Tests.SendTo_MemoryNativeTask.Datagram_UDP_ShouldImplicitlyBindLocalEndpoint
Exception messages: Assert.NotNull() Failure: Value is null   Exception stack traces:    at System.Net.Sockets.Tests.SendTo`1.<Datagram_UDP_ShouldImplicitlyBindLocalEndpoint>d__7[[System.Net.Sockets.Tests.SocketHelperMemoryNativeTask, System.Net.Sockets.Tests, Version=10.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51]].MoveNext()

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1167858
Error message validated: [Network is unreachable]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/8/2025 8:01:45 AM UTC

Report

Build	Definition	Step Name	Console log	Pull Request
1234737	dotnet/runtime	Build product	Log	#122012
1234290	dotnet/runtime	Build product	Log	#122449
1233680	dotnet/runtime	Build product	Log	#122600
2861814	dotnet-runtime	Build product	Log
1232171	dotnet/runtime	Build product	Log	#121412
1232022	dotnet/runtime	Build product	Log	#118264
1231945	dotnet/runtime	Build product	Log	#122533
1231927	dotnet/runtime	Build product	Log	#122449
1231694	dotnet/runtime	Build product	Log	#122533
1231692	dotnet/runtime	Build product	Log	#122533
1231597	dotnet/runtime	Build product	Log	#122283
1231598	dotnet/runtime	Build product	Log	#122283
1231051	dotnet/runtime	Build product	Log	#122533
1230893	dotnet/runtime	Build product	Log	#122449
1230682	dotnet/runtime	Build product	Log	#122525
1230669	dotnet/runtime	Build product	Log	#122449
1230462	dotnet/runtime	Build product	Log	#121679
1230187	dotnet/runtime	Build product	Log	#122505
1230185	dotnet/runtime	Build product	Log	#122505
1227383	dotnet/runtime	Build product	Log	#114983
1228971	dotnet/runtime	Send tests to Helix (Unix)	Log	#122469
1229038	dotnet/runtime	Build	Log	#122471
1228955	dotnet/runtime	Build product	Log	#122449
1228953	dotnet/runtime	Build product	Log	#122449
1228856	dotnet/runtime	Build product	Log	#122112
1228809	dotnet/runtime	Build product	Log	#122467
1228725	dotnet/runtime	Build product	Log	#122423
1224200	dotnet/runtime	Build product	Log	#122308
2856591	dotnet-runtime	Run performance job script	Log
1223925	dotnet/runtime	Build product	Log	#121412
1222097	dotnet/runtime	Send to Helix	Log
1220921	dotnet/runtime	Build	Log	#122162
1220920	dotnet/runtime	Build product	Log	#122162
1220420	dotnet/runtime	Send to Helix	Log	#115502
1219957	dotnet/runtime	Build product	Log	#121853
1219771	dotnet/runtime	Send to Helix	Log	#121343
1219379	dotnet/runtime	Build product	Log	#122154
1219106	dotnet/runtime	Build product	Log	#121412
1217597	dotnet/runtime	Build product	Log	#121412
1218111	dotnet/runtime	Build product	Log	#121853
1217971	dotnet/runtime	Build product	Log	#114983
1217940	dotnet/runtime	Build product	Log	#121853
1217346	dotnet/runtime	Build product	Log	#122098
1217255	dotnet/runtime	Build product	Log	#122094
1216618	dotnet/runtime	Send to Helix	Log	#119432
1215067	dotnet/runtime	Build product	Log	#122032
1214285	dotnet/runtime	Build product	Log	#122017
1213668	dotnet/runtime	Build product	Log	#121666
1212985	dotnet/runtime	Build Tests	Log	#121697
1211824	dotnet/runtime	Build product	Log	#121943
1211450	dotnet/runtime	Build product	Log	#119575
1210149	dotnet/runtime	Build product	Log	#121343
1209838	dotnet/runtime	Build product	Log	#107585
1209511	dotnet/runtime	Build product	Log	#121072
1209249	dotnet/runtime	Build product	Log	#121343
1209026	dotnet/runtime	Build product	Log	#121343
1206977	dotnet/runtime	Build product	Log	#121753
1206827	dotnet/runtime	Build product	Log	#121679

Build	Definition	Test	Pull Request
1235041	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1234598	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1233488	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1232841	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1225475	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1221896	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1214558	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1208373	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
3	31	66

[dotnet-policy-service]

Tagging subscribers to 'arch-android': @vitek-karas, @simonrozsival, @steveisok, @akoeplinger
See info in area-owners.md if you want to be subscribed.

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/ncl
See info in area-owners.md if you want to be subscribed.

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• [android] Connection issues in Sockets and Functional networking tests #104709

[vitek-karas]

Likely related to #119851 and #119852 they all seem to have similar behavior. It's possibly underlying platform issue, not specified to the failing tests.

[kotlarmilos]

It looks like the internet connection is blocked, or something similar. This reminds me of #114450.

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/ncl
See info in area-owners.md if you want to be subscribed.

[liveans]

Interestingly, the failure seems like the same as #114450, was there any update on Android arm infra lately? My suspicion is that: This is related to environment itself (similar to privacy setting thingy in #114450).