Ping_TimedOut_TAP|Sync_Success fails on MacOS

[liveans]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1035079
Build error leg or test failing: System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success

Error Message

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

{
  "ErrorPattern": "System\\.Net\\.NetworkInformation\\.Tests\\.PingTest\\.Ping_TimedOut_(TAP|Sync)_Success \\[FAIL\\]",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1035079
Error message validated: [System\.Net\.NetworkInformation\.Tests\.PingTest\.Ping_TimedOut_(TAP|Sync)_Success \[FAIL\]]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 5/7/2025 8:26:29 AM UTC

Report

Build	Definition	Test	Pull Request
1060886	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1059893	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1058725	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1057797	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1057777	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success	#109648
1056733	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1056135	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1055707	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1055002	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1053976	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1051856	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1051224	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1050633	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1050347	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1049549	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1048541	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1047453	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1047452	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1046313	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1046299	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1045060	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1045064	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1044304	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1044297	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1043483	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1043487	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1042446	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1042447	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1041302	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1041301	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1040401	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1040400	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1039435	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1039436	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1038882	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1038878	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1038561	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1038560	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1037692	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1037683	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success
1036857	dotnet/runtime	System.Net.NetworkInformation.Tests.PingTest.Ping_TimedOut_Sync_Success

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
1	8	41

[dotnet-policy-service]

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

[wfurt]

I did get login on the particular machine and OS ping works as expected.

helix-runner@dci-mac-build-053 ~ % ping 192.0.2.0
PING 192.0.2.0 (192.0.2.0): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2

this may be transient error and perhaps we shall just swallow the exception. Or pass the test as long as the Ping does not succeed

[liveans]

What I'm curious about is that: if ping tool is also swallowing DestinationUnreachable as TimedOut as well, because according to ping's nature it's practically same, and if that's the case should we do it in product code instead?

[wfurt]

IU don't see any responses on that machine when running OS ping .... as it should.

helix-runner@dci-mac-build-053 ~ % sudo tcpdump -i en0 icmp
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on en0, link-type EN10MB (Ethernet), capture size 262144 bytes
13:00:25.151521 IP 10.240.144.28 > 192.0.2.0: ICMP echo request, id 46708, seq 0, length 64
13:00:26.161657 IP 10.240.144.28 > 192.0.2.0: ICMP echo request, id 46708, seq 1, length 64
13:00:27.163837 IP 10.240.144.28 > 192.0.2.0: ICMP echo request, id 46708, seq 2, length 64
13:00:28.165994 IP 10.240.144.28 > 192.0.2.0: ICMP echo request, id 46708, seq 3, length 64
13:00:29.170474 IP 10.240.144.28 > 192.0.2.0: ICMP echo request, id 46708, seq 4, length 64
13:00:30.172687 IP 10.240.144.28 > 192.0.2.0: ICMP echo request, id 46708, seq 5, length 64