System.Net.NameResolution.Functional.Tests failing on Ubuntu 16.04 and Debian9 #56295

karelz · 2021-07-26T11:45:57Z

Failing tests ("Name or service not known"):

System.Net.NameResolution.Tests.GetHostEntryTest:
- Dns_GetHostEntry_HostString_Ok("")
- Dns_GetHostEntryAsync_HostString_Ok("")
- Dns_GetHostEntry_DisableIPv6_ExcludesIPv6Addresses("")
- Dns_GetHostEntryAsync_DisableIPv6_ExcludesIPv6Addresses("")
System.Net.NameResolution.Tests.GetHostByNameTest:
- DnsObsoleteGetHostByName_EmptyString_ReturnsHostName
- DnsObsoleteBeginEndGetHostByName_EmptyString_ReturnsHostName

Similar to SLES failures in #55271

Failures 5/26-7/27 (incl. PRs):

Day	Failures
7/25	3x Official run + 6x PR
7/26	9x Official + 50x PR
7/27 (incomplete day)	2x PR

Failures callstacks:

Failure: - DnsObsoleteGetHostByName_EmptyString_ReturnsHostName - DnsObsoleteBeginEndGetHostByName_EmptyString_ReturnsHostName ``` System.Net.Internals.SocketExceptionFactory+ExtendedSocketException : Name or service not known

at System.Net.Dns.GetHostEntryOrAddressesCore(String hostName, Boolean justAddresses, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 403
at System.Net.Dns.GetHostEntryCore(String hostName, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 384
at System.Net.Dns.GetHostByName(String hostName) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 271
at System.Net.NameResolution.Tests.GetHostByNameTest.DnsObsoleteGetHostByName_EmptyString_ReturnsHostName() in //src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostByNameTest.cs:line 116
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) in /_/src/mono/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.cs:line 370


Failure:
  - Dns_GetHostEntry_DisableIPv6_ExcludesIPv6Addresses
  - Dns_GetHostEntryAsync_DisableIPv6_ExcludesIPv6Addresses

Microsoft.DotNet.RemoteExecutor.RemoteExecutionException : Remote process failed with an unhandled exception.

Child exception:
System.Net.Internals.SocketExceptionFactory+ExtendedSocketException (00000005, 0xFFFDFFFF): Name or service not known
at System.Net.Dns.GetHostEntryOrAddressesCore(String hostName, Boolean justAddresses, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 403
at System.Net.Dns.GetHostEntryCore(String hostName, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 384
at System.Net.Dns.<>c.b__33_1(Object s) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 591
at System.Net.Dns.<>c__DisplayClass39_01[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].<RunAsync>b__0(Task <p0>, Object <p1>) in /_/src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 688 at System.Threading.Tasks.ContinuationResultTaskFromTask1[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].InnerInvoke() in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/TaskContinuation.cs:line 94
at System.Threading.Tasks.Task.<>c.<.cctor>b__271_0(Object obj) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2369
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 268
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 293
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2331
--- End of stack trace from previous location ---
at System.Net.NameResolution.Tests.GetHostEntryTest.<Dns_GetHostEntryAsync_DisableIPv6_ExcludesIPv6Addresses>g__RunTest|8_0(String hostnameInner) in /_/src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostEntryTest.cs:line 152
at Microsoft.DotNet.RemoteExecutor.Program.Main(String[] args) in Microsoft.DotNet.RemoteExecutor.dll:token 0x6000006+0xf5

Child process:
System.Net.NameResolution.Functional.Tests, Version=6.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 System.Net.NameResolution.Tests.GetHostEntryTest System.Threading.Tasks.Task <Dns_GetHostEntryAsync_DisableIPv6_ExcludesIPv6Addresses>g__RunTest|8_0(System.String)

Child arguments:


Failure: Dns_GetHostEntry_HostString_Ok

System.Exception : Failed for empty hostname.
Dns.GetHostName() == a008NNH
getHostEntryException==System.Net.Internals.SocketExceptionFactory+ExtendedSocketException (00000005, 0xFFFDFFFF): Name or service not known
at System.Net.Dns.GetHostEntryOrAddressesCore(String hostName, Boolean justAddresses, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 403
at System.Net.Dns.GetHostEntryCore(String hostName, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 384
at System.Net.Dns.GetHostEntry(String hostNameOrAddress, AddressFamily family) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 91
at System.Net.Dns.GetHostEntry(String hostNameOrAddress) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 60
at System.Net.NameResolution.Tests.GetHostEntryTest.Dns_GetHostEntry_HostString_Ok(String hostName) in /_/src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostEntryTest.cs:line 60
etcHostsException==
/etc/host ==
127.0.0.1 localhost

The following lines are desirable for IPv6 capable hosts

::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

---- System.Net.Internals.SocketExceptionFactory+ExtendedSocketException : Name or service not known


Failure Dns_GetHostEntryAsync_HostString_Ok:

System.AggregateException : One or more errors occurred. (One or more errors occurred. (Name or service not known)) (One or more errors occurred. (Name or service not known))
---- System.AggregateException : One or more errors occurred. (Name or service not known)
-------- System.Net.Internals.SocketExceptionFactory+ExtendedSocketException : Name or service not known
---- System.AggregateException : One or more errors occurred. (Name or service not known)
-------- System.Net.Internals.SocketExceptionFactory+ExtendedSocketException : Name or service not known

at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks) in //src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs:line 80
at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks, Int32 millisecondsTimeout) in //src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs:line 49
at System.Net.NameResolution.Tests.GetHostEntryTest.TestGetHostEntryAsync(Func`1 getHostEntryFunc) in //src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostEntryTest.cs:line 112
at System.Net.NameResolution.Tests.GetHostEntryTest.Dns_GetHostEntryAsync_HostString_Ok(String hostName) in //src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostEntryTest.cs:line 100
--- End of stack trace from previous location ---
----- Inner Stack Trace #1 (System.AggregateException) -----

----- Inner Stack Trace -----
at System.Net.Dns.GetHostEntryOrAddressesCore(String hostName, Boolean justAddresses, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 403
at System.Net.Dns.GetHostEntryCore(String hostName, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 384
at System.Net.Dns.<>c.b__33_1(Object s) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 591
at System.Net.Dns.<>c__DisplayClass39_01[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].<RunAsync>b__0(Task <p0>, Object <p1>) in /_/src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 688 at System.Threading.Tasks.ContinuationResultTaskFromTask1[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].InnerInvoke() in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/TaskContinuation.cs:line 94
at System.Threading.Tasks.Task.<>c.<.cctor>b__271_0(Object obj) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2369
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 268
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 293
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2331
--- End of stack trace from previous location ---
at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks) in /_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs:line 63
----- Inner Stack Trace #2 (System.AggregateException) -----

----- Inner Stack Trace -----
at System.Net.Dns.GetHostEntryOrAddressesCore(String hostName, Boolean justAddresses, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 403
at System.Net.Dns.GetHostEntryCore(String hostName, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 384
at System.Net.Dns.<>c.b__33_1(Object s) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 591
at System.Net.Dns.<>c__DisplayClass39_01[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].<RunAsync>b__0(Task <p0>, Object <p1>) in /_/src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 688 at System.Threading.Tasks.ContinuationResultTaskFromTask1[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].InnerInvoke() in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/TaskContinuation.cs:line 94
at System.Threading.Tasks.Task.<>c.<.cctor>b__271_0(Object obj) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2369
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 268
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 293
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2331

</details>

The text was updated successfully, but these errors were encountered:

ghost · 2021-07-26T11:46:01Z

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

Issue Details

Failing tests ("Name or service not known"):

System.Net.NameResolution.Tests.GetHostEntryTest:
- Dns_GetHostEntry_HostString_Ok
- Dns_GetHostEntryAsync_HostString_Ok
- Dns_GetHostEntry_DisableIPv6_ExcludesIPv6Addresses
- Dns_GetHostEntryAsync_DisableIPv6_ExcludesIPv6Addresses
System.Net.NameResolution.Tests.GetHostByNameTest:
- DnsObsoleteGetHostByName_EmptyString_ReturnsHostName
- DnsObsoleteBeginEndGetHostByName_EmptyString_ReturnsHostName

Similar to SLES failures in #55271

Failures 5/26-7/26 (incl. PRs):

Day	Failures
7/25	3x Official run + 6x PR
7/26 (incomplete day)	7x Official + 19x PR

Failures callstacks:

Failure: - DnsObsoleteGetHostByName_EmptyString_ReturnsHostName - DnsObsoleteBeginEndGetHostByName_EmptyString_ReturnsHostName ``` System.Net.Internals.SocketExceptionFactory+ExtendedSocketException : Name or service not known

at System.Net.Dns.GetHostEntryOrAddressesCore(String hostName, Boolean justAddresses, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 403
at System.Net.Dns.GetHostEntryCore(String hostName, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 384
at System.Net.Dns.GetHostByName(String hostName) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 271
at System.Net.NameResolution.Tests.GetHostByNameTest.DnsObsoleteGetHostByName_EmptyString_ReturnsHostName() in //src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostByNameTest.cs:line 116
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) in /_/src/mono/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.cs:line 370


Failure:
  - Dns_GetHostEntry_DisableIPv6_ExcludesIPv6Addresses
  - Dns_GetHostEntryAsync_DisableIPv6_ExcludesIPv6Addresses

Microsoft.DotNet.RemoteExecutor.RemoteExecutionException : Remote process failed with an unhandled exception.

Child exception:
System.Net.Internals.SocketExceptionFactory+ExtendedSocketException (00000005, 0xFFFDFFFF): Name or service not known
at System.Net.Dns.GetHostEntryOrAddressesCore(String hostName, Boolean justAddresses, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 403
at System.Net.Dns.GetHostEntryCore(String hostName, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 384
at System.Net.Dns.<>c.b__33_1(Object s) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 591
at System.Net.Dns.<>c__DisplayClass39_01[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].<RunAsync>b__0(Task <p0>, Object <p1>) in /_/src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 688 at System.Threading.Tasks.ContinuationResultTaskFromTask1[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].InnerInvoke() in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/TaskContinuation.cs:line 94
at System.Threading.Tasks.Task.<>c.<.cctor>b__271_0(Object obj) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2369
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 268
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 293
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2331
--- End of stack trace from previous location ---
at System.Net.NameResolution.Tests.GetHostEntryTest.<Dns_GetHostEntryAsync_DisableIPv6_ExcludesIPv6Addresses>g__RunTest|8_0(String hostnameInner) in /_/src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostEntryTest.cs:line 152
at Microsoft.DotNet.RemoteExecutor.Program.Main(String[] args) in Microsoft.DotNet.RemoteExecutor.dll:token 0x6000006+0xf5

Child process:
System.Net.NameResolution.Functional.Tests, Version=6.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 System.Net.NameResolution.Tests.GetHostEntryTest System.Threading.Tasks.Task <Dns_GetHostEntryAsync_DisableIPv6_ExcludesIPv6Addresses>g__RunTest|8_0(System.String)

Child arguments:


Failure: Dns_GetHostEntry_HostString_Ok

System.Exception : Failed for empty hostname.
Dns.GetHostName() == a008NNH
getHostEntryException==System.Net.Internals.SocketExceptionFactory+ExtendedSocketException (00000005, 0xFFFDFFFF): Name or service not known
at System.Net.Dns.GetHostEntryOrAddressesCore(String hostName, Boolean justAddresses, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 403
at System.Net.Dns.GetHostEntryCore(String hostName, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 384
at System.Net.Dns.GetHostEntry(String hostNameOrAddress, AddressFamily family) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 91
at System.Net.Dns.GetHostEntry(String hostNameOrAddress) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 60
at System.Net.NameResolution.Tests.GetHostEntryTest.Dns_GetHostEntry_HostString_Ok(String hostName) in /_/src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostEntryTest.cs:line 60
etcHostsException==
/etc/host ==
127.0.0.1 localhost

The following lines are desirable for IPv6 capable hosts

::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

---- System.Net.Internals.SocketExceptionFactory+ExtendedSocketException : Name or service not known


Failure Dns_GetHostEntryAsync_HostString_Ok:

System.AggregateException : One or more errors occurred. (One or more errors occurred. (Name or service not known)) (One or more errors occurred. (Name or service not known))
---- System.AggregateException : One or more errors occurred. (Name or service not known)
-------- System.Net.Internals.SocketExceptionFactory+ExtendedSocketException : Name or service not known
---- System.AggregateException : One or more errors occurred. (Name or service not known)
-------- System.Net.Internals.SocketExceptionFactory+ExtendedSocketException : Name or service not known

at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks) in //src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs:line 80
at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks, Int32 millisecondsTimeout) in //src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs:line 49
at System.Net.NameResolution.Tests.GetHostEntryTest.TestGetHostEntryAsync(Func`1 getHostEntryFunc) in //src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostEntryTest.cs:line 112
at System.Net.NameResolution.Tests.GetHostEntryTest.Dns_GetHostEntryAsync_HostString_Ok(String hostName) in //src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostEntryTest.cs:line 100
--- End of stack trace from previous location ---
----- Inner Stack Trace #1 (System.AggregateException) -----

----- Inner Stack Trace -----
at System.Net.Dns.GetHostEntryOrAddressesCore(String hostName, Boolean justAddresses, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 403
at System.Net.Dns.GetHostEntryCore(String hostName, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 384
at System.Net.Dns.<>c.b__33_1(Object s) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 591
at System.Net.Dns.<>c__DisplayClass39_01[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].<RunAsync>b__0(Task <p0>, Object <p1>) in /_/src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 688 at System.Threading.Tasks.ContinuationResultTaskFromTask1[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].InnerInvoke() in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/TaskContinuation.cs:line 94
at System.Threading.Tasks.Task.<>c.<.cctor>b__271_0(Object obj) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2369
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 268
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 293
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2331
--- End of stack trace from previous location ---
at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks) in /_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs:line 63
----- Inner Stack Trace #2 (System.AggregateException) -----

----- Inner Stack Trace -----
at System.Net.Dns.GetHostEntryOrAddressesCore(String hostName, Boolean justAddresses, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 403
at System.Net.Dns.GetHostEntryCore(String hostName, AddressFamily addressFamily) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 384
at System.Net.Dns.<>c.b__33_1(Object s) in //src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 591
at System.Net.Dns.<>c__DisplayClass39_01[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].<RunAsync>b__0(Task <p0>, Object <p1>) in /_/src/libraries/System.Net.NameResolution/src/System/Net/Dns.cs:line 688 at System.Threading.Tasks.ContinuationResultTaskFromTask1[[System.Net.IPHostEntry, System.Net.NameResolution, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]].InnerInvoke() in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/TaskContinuation.cs:line 94
at System.Threading.Tasks.Task.<>c.<.cctor>b__271_0(Object obj) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2369
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 268
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) in //src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs:line 293
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) in //src/libraries/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:line 2331

</details>


<table>
  <tr>
    <th align="left">Author:</th>
    <td>karelz</td>
  </tr>
  <tr>
    <th align="left">Assignees:</th>
    <td>-</td>
  </tr>
  <tr>
    <th align="left">Labels:</th>
    <td>

`area-System.Net`, `os-linux`, `test-run-core`

</td>
  </tr>
  <tr>
    <th align="left">Milestone:</th>
    <td>-</td>
  </tr>
</table>
</details>

Disabled tests tracked by dotnet#56295

karelz · 2021-07-26T12:01:18Z

@antonfirsov @wfurt any idea what is going on? Looks like 2 more distros (beside SLES) have now problem with DNS resolution of empty string.

Disabled tests tracked by #56295

karelz · 2021-07-26T14:25:57Z

Tests disabled in PR #56296 on 7/26

karelz · 2021-07-27T19:38:22Z

@dotnet/dncenghot it looks like these 2 images changed and regressed behavior of self-resolution (empty string passed to DNS). Can they be fixed please?
It is similar to what happened recently on SLES (2-3 weeks ago). We are slowly loosing coverage.

Also, is there a way to add it as a smoke test for new images?

MattGal · 2021-07-27T19:44:00Z

@dotnet/dncenghot it looks like these 2 images changed and regressed behavior of self-resolution (empty string passed to DNS). Can they be fixed please?
It is similar to what happened recently on SLES (2-3 weeks ago). We are slowly loosing coverage./

Also, is there a way to add it as a smoke test for new images?

Nothing has changed in the time range you're listing; we roll out updates on Wednesdays, and the first day you list is 7/25. Neither image has changed since 6/25/2021, nor has anything we run on them (client scripts, and only these, updated 7/21).

I'll take a few minutes to investigate your failures; I suspect something running before your work items is badly behaved.

wfurt · 2021-07-27T19:48:06Z

This is not necessarily just about the image. It is about ability for machine to resolve own name.

MattGal · 2021-07-27T19:49:05Z

Sure, I was responding to " it looks like these 2 images changed" and letting you know that hasn't happened for over a month.

karelz · 2021-07-27T20:09:37Z

For completeness: We discussed making our tests resilient to this technically valid setup of Linux, however -- that would remove our code coverage as we wouldn't know if all images are already in the bucket of "tainted" or not ...
Hopefully we will find out what ran before us that caused this ...

MattGal · 2021-07-27T21:22:30Z

Created https://github.com/dotnet/core-eng/issues/13889. I ran your exact failing work items on Debian 9 and Ubuntu 16.04 and am convinced the problem has nothing to do with the behaviors of any previous work items, rather this seems like a symptom of VMs starting up a bit fast and the child processes of the Helix client not having functional DNS ready. We had worked around this in the past but unintentionally lost the kludge when moving off cron to start agents. (see other issue for notes)

karelz · 2021-07-28T08:56:20Z

Thanks @MattGal for tracking it down! I assume it may help us also with the same problem on SLES - see #55271.

MattGal · 2021-07-28T15:27:58Z

Thanks @MattGal for tracking it down! I assume it may help us also with the same problem on SLES - see #55271.

Yes, I'd expect this to help that as well, though it missed this week's "train" and wouldn't roll out until next Weds. Fingers crossed.

karelz · 2021-07-28T17:41:16Z

@MattGal no rush - if the number of affected distros doesn't go up in the meantime, we can live in this state for a while.

The underlying infrastructure issue was addressed in dotnet/core-eng#13889 Fixes dotnet#55271 Fixes dotnet#56295

…7509) The underlying infrastructure issue was addressed in dotnet/core-eng#13889 Fixes #55271 Fixes #56295

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Disable DNS tests failing on Ubuntu 16.04 and Debian 9

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Disable DNS tests failing on Ubuntu 16.04 and Debian 9 #56296

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adjust exception message for headers having non-ASCII chars #55886

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Disable DNS tests failing on Ubuntu 16.04 and Debian 9 (#56296)

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Upgrade to msbuild version 16.10 to fix big-endian bug #56025

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[release/5.0] Disable DNS tests on SLES #56377

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Re-enable NameResolution tests on SLES, Debian 9 and Ubuntu 16.04

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The underlying infrastructure issue was addressed in dotnet/core-eng#13889 Fixes dotnet#55271 Fixes dotnet#56295

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Re-enable NameResolution tests on SLES, Debian 9 and Ubuntu 16.04 #57509

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System.Net.NameResolution.Functional.Tests failing on Ubuntu 16.04 and Debian9 #56295

System.Net.NameResolution.Functional.Tests failing on Ubuntu 16.04 and Debian9 #56295

karelz commented Jul 26, 2021 •

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The following lines are desirable for IPv6 capable hosts

ghost commented Jul 26, 2021

The following lines are desirable for IPv6 capable hosts

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MattGal commented Jul 28, 2021

karelz commented Jul 28, 2021

System.Net.NameResolution.Functional.Tests failing on Ubuntu 16.04 and Debian9 #56295

System.Net.NameResolution.Functional.Tests failing on Ubuntu 16.04 and Debian9 #56295

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karelz commented Jul 26, 2021 • edited Loading

The following lines are desirable for IPv6 capable hosts

ghost commented Jul 26, 2021

The following lines are desirable for IPv6 capable hosts

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