[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
1266758	dotnet/runtime	Build product	Log	#123611
1265813	dotnet/runtime	Send tests to Helix (Unix)	Log	#123576
1264868	dotnet/runtime	Build product	Log	#123557
1264574	dotnet/runtime	Build product	Log	#123545
1264480	dotnet/runtime	Build product	Log	#123252
1264063	dotnet/runtime	Build product	Log	#123514
1263877	dotnet/runtime	Send to Helix	Log	#122947
1262910	dotnet/runtime	Send to Helix	Log	#123483
1262634	dotnet/runtime	Build product	Log	#123478
1262623	dotnet/runtime	Build product	Log	#118207
1262575	dotnet/runtime	Build product	Log
1262093	dotnet/runtime	Build product	Log	#123454
1261065	dotnet/runtime	Build product	Log	#123350
1260584	dotnet/runtime	Build product	Log	#120688
1260254	dotnet/runtime	Build product	Log	#123407
1259759	dotnet/runtime	Build product	Log	#123329
1259351	dotnet/runtime	Send to Helix	Log	#123076
1258958	dotnet/runtime	Build product	Log
1258621	dotnet/runtime	Build product	Log	#119575
1258442	dotnet/runtime	Build product	Log	#123354
1258348	dotnet/runtime	Build product	Log	#123322
1258106	dotnet/runtime	Build product	Log	#123145
1257708	dotnet/runtime	Build product	Log	#123248
1257400	dotnet/runtime	Build product	Log	#123322
1257359	dotnet/runtime	Build product	Log	#123322
1257063	dotnet/runtime	Build product	Log	#123314
1256406	dotnet/runtime	Build product	Log	#120306
1256212	dotnet/runtime	Build product	Log	#123090
1255963	dotnet/runtime	Build product	Log	#123109
1255690	dotnet/runtime	Send to Helix	Log
1254380	dotnet/runtime	Build product	Log	#123215
1253682	dotnet/runtime	Build product	Log	#122878
1253462	dotnet/runtime	Build product	Log	#118264
1253357	dotnet/runtime	Build product	Log	#123182
1252817	dotnet/runtime	Build product	Log	#122093
1252312	dotnet/runtime	Build product	Log	#122878
1251999	dotnet/runtime	Build product	Log	#123101
1251997	dotnet/runtime	Build product	Log	#123101
2878059	dotnet-runtime	Build product	Log
1251527	dotnet/runtime	Build product	Log	#122970
1250598	dotnet/runtime	Build product	Log	#123099
1248806	dotnet/runtime	Build product	Log	#118415
1248634	dotnet/runtime	Build product	Log	#123047
1248487	dotnet/runtime	Build product	Log	#122938
1248430	dotnet/runtime	Build product	Log	#122911
1247417	dotnet/runtime	Build product	Log	#122722
2874990	dotnet-runtime	Install workload using artifacts	Log
1247153	dotnet/runtime	Build	Log	#122216
1244275	dotnet/runtime	Build product	Log	#121367
2872299	dotnet-runtime	Run performance job script	Log
1243266	dotnet/runtime	Build product	Log	#122878
1243264	dotnet/runtime	Build product	Log	#122878
1242112	dotnet/runtime	Build product	Log	#122449
2870772	dotnet-runtime	Install workload using artifacts	Log
1241377	dotnet/runtime	Build product	Log	#122791
1240284	dotnet/runtime	Build product	Log	#122774
2868620	dotnet-runtime	Install workload using artifacts	Log
1239783	dotnet/runtime	Build product	Log	#122758
1239565	dotnet/runtime	Build coreclr/libs components needed by test build	Log	#122723

Build	Definition	Test	Pull Request
1266509	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1265579	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#123248
1264815	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#122373
1264235	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1263719	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1263219	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#122373
1262577	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1261127	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#122556
1260702	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1259961	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1259547	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#119575
1259210	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1259471	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1258627	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1256821	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1256398	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#122371
1256394	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1253335	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#122556
1252794	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1252238	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1251868	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#122371
1251824	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1251385	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#119575
1251042	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1250596	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1250229	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#123055
1249941	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#123083
1249502	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1249332	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1249204	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1248652	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#122371
1247588	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1247349	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#122371
1246694	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1246186	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1246177	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#122371
1244945	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1243545	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1243308	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1242941	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1242801	dotnet/runtime	System.Net.NameResolution.Pal.Tests.WorkItemExecution
1242709	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1242569	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1242422	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1242332	dotnet/runtime	System.Net.Mail.Functional.Tests.WorkItemExecution	#122824
1242257	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1242064	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#121956
1241915	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1241816	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1241708	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1241533	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1241252	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1241084	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1240743	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1240601	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1240503	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1240479	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1240232	dotnet/runtime	System.Net.NameResolution.Pal.Tests.WorkItemExecution
1239959	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1239805	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1239671	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1239576	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
2	36	121

[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).