[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
2937414	dotnet-runtime	Upload build info file	Log
1344156	dotnet/runtime	Build product	Log	#125755
1344155	dotnet/runtime	Build product	Log	#125755
2929919	dotnet-runtime	Build product	Log	#59204
1341289	dotnet/runtime	Build	Log
1339821	dotnet/runtime	Build product	Log	#125505
1339732	dotnet/runtime	Build product	Log	#125670
1338428	dotnet/runtime	Send to Helix	Log	#125251
1339640	dotnet/runtime	Build product	Log	#123920
2928811	dotnet-runtime	Send job to Helix (Unix)	Log
1339396	dotnet/runtime	Build Tests	Log	#125603
1339391	dotnet/runtime	Build product	Log	#125604
1339388	dotnet/runtime	Build product	Log	#124544
1339288	dotnet/runtime	Build product	Log	#125505
1339171	dotnet/runtime	Build product	Log	#125607
1338852	dotnet/runtime	Build product	Log	#125512
1337873	dotnet/runtime	Build product	Log	#125505
1337490	dotnet/runtime	Build product	Log	#125610
1337454	dotnet/runtime	Build product	Log	#122093
1336612	dotnet/runtime	Send to Helix	Log	#125595
1335407	dotnet/runtime	Build product	Log	#125554
1335388	dotnet/runtime	Send to Helix	Log
1334986	dotnet/runtime	Build product	Log	#125542
1334932	dotnet/runtime	Build product	Log	#125505
1334816	dotnet/runtime	Build product	Log	#124801
1334568	dotnet/runtime	Build product	Log	#124352
1333584	dotnet/runtime	Build product	Log	#125422
2925315	dotnet-runtime	Generate test wrappers	Log
1331716	dotnet/runtime	Build product	Log	#125470
2924652	dotnet-runtime	Restore and Build Product	Log	#58444
1331289	dotnet/runtime	Build product	Log	#125075
1331520	dotnet/runtime	Build product	Log	#125470
1331477	dotnet/runtime	Build product	Log	#124611
1331362	dotnet/runtime	Build product	Log	#125406
1331320	dotnet/runtime	Build product	Log	#124544
1328825	dotnet/runtime	Build product	Log	#125397
1328822	dotnet/runtime	Build product	Log	#125352
1327792	dotnet/runtime	Build product	Log	#125365
1327790	dotnet/runtime	Build product	Log	#125365
1327196	dotnet/runtime	Build product	Log	#125019
1327161	dotnet/runtime	Build product	Log	#125352
1327159	dotnet/runtime	Build product	Log	#125352
1327030	dotnet/runtime	Build product	Log	#125196
1326698	dotnet/runtime	Build product	Log	#115996
1326264	dotnet/runtime	Build product	Log	#115996
2921780	dotnet-runtime	Build product	Log	#58741
1325328	dotnet/runtime	Build product	Log	#125298
1324464	dotnet/runtime	Build product	Log	#125019
2920182	dotnet-runtime	Restore and Build Product	Log	#58444
1322160	dotnet/runtime	Send tests to Helix (Unix)	Log	#125226
1321541	dotnet/runtime	Build product	Log	#124990
1321228	dotnet/runtime	Build product	Log	#124405
1321061	dotnet/runtime	Build coreclr/libs components needed by test build	Log	#125196
1320659	dotnet/runtime	Build product	Log	#124561
1320253	dotnet/runtime	Build product	Log	#124544
1319119	dotnet/runtime	Send tests to Helix (Unix)	Log	#124756
1318840	dotnet/runtime	Build product	Log	#125075
1317304	dotnet/runtime	Send to Helix	Log	#125097
1316872	dotnet/runtime	Send to Helix (Unix)	Log	#124854
1316833	dotnet/runtime	Build product	Log	#125075
1315417	dotnet/runtime	Build product	Log	#124125
2916155	dotnet-runtime	Restore and Build Product	Log	#58444
2916110	dotnet-runtime	Build product	Log	#57892
1315660	dotnet/runtime	Build product	Log	#125019
1315349	dotnet/runtime	Build product	Log	#125019
1315005	dotnet/runtime	Send to Helix	Log
1314837	dotnet/runtime	Build product	Log	#124940

Build	Definition	Test	Pull Request
1357328	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1356819	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1355466	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1353188	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1351548	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1351537	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1351200	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1349307	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1346796	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1346067	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1344840	dotnet/runtime	System.Runtime.InteropServices.Tests.WorkItemExecution	#125083
1344417	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1344071	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1342414	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1341633	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1339813	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1339128	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#125481
1338859	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1338630	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1337995	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1335226	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1333905	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#125478
1333513	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1332663	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1332305	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1331251	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#125350
1331642	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1331090	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1329452	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#125354
1329675	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1327708	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#125354
1327554	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1325841	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1325417	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1324517	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1321402	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1319267	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1319233	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1318408	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution
1315468	dotnet/runtime	System.Net.Sockets.Tests.WorkItemExecution	#124801

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
1	9	107

[dotnet-policy-service]

Tagging subscribers to 'arch-android': @vitek-karas, @simonrozsival, @steveisok, @akoeplinger
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[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/ncl
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[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).