Types of failures

Affected tests:

• GetHostByName_HostName
• TryGetAddrInfo_HostName

TryGetAddrInfo_HostName

TryGetAddrInfo_HostName test in build 20171203.01 (same for OSX and Linux):

Assert.Equal() Failure
Expected: Success
Actual:   HostNotFound
at System.Net.NameResolution.PalTests.NameResolutionPalTests.TryGetAddrInfo_HostName() in /Users/buildagent/agent/_work/320/s/corefx/src/System.Net.NameResolution/tests/PalTests/NameResolutionPalTests.cs:line 129

GetHostByName_HostName

The error is:

• OSX - Device not configured
• Linux - No such device or address (same callstack)

GetHostByName_HostName test in build 20171203.01 (OSX):

System.Net.Internals.SocketExceptionFactory+ExtendedSocketException : Device not configured
at   System.Net.NameResolutionPal.GetHostByName(String hostName) in   /Users/buildagent/agent/_work/320/s/corefx/src/System.Net.NameResolution/src/System/Net/NameResolutionPal.Unix.cs:line   157
at System.Net.NameResolution.PalTests.NameResolutionPalTests.GetHostByName_HostName()   in   /Users/buildagent/agent/_work/320/s/corefx/src/System.Net.NameResolution/tests/PalTests/NameResolutionPalTests.cs:line   53

History of failures

Note: The tests always both fail - maybe bad setup?

Day	Build	OS	Test
9/5	20170905.02	Debian90	GetHostByName_HostName & TryGetAddrInfo_HostName
9/10	20170910.01	Ubuntu14.04	GetHostByName_HostName & TryGetAddrInfo_HostName
9/15	20170915.02	Debian87	GetHostByName_HostName & TryGetAddrInfo_HostName
9/16	20170916.02	Debian87	GetHostByName_HostName & TryGetAddrInfo_HostName
9/20	20170920.03	Debian90	GetHostByName_HostName & TryGetAddrInfo_HostName
9/27	20170927.01	Debian87	GetHostByName_HostName & TryGetAddrInfo_HostName
9/27	20170927.02	Debian87	GetHostByName_HostName & TryGetAddrInfo_HostName
10/2	20171002.01	Debian87	GetHostByName_HostName & TryGetAddrInfo_HostName
10/3	20171003.01	Debian87	GetHostByName_HostName & TryGetAddrInfo_HostName
10/3	20171003.02	Debian90	GetHostByName_HostName & TryGetAddrInfo_HostName
10/9	20171009.04	SLES12	GetHostByName_HostName & TryGetAddrInfo_HostName
10/23	20171020.52	Debian87	GetHostByName_HostName & TryGetAddrInfo_HostName
10/25	20171025.07	Debian87	GetHostByName_HostName & TryGetAddrInfo_HostName
10/26	20171026.01	Debian87	GetHostByName_HostName & TryGetAddrInfo_HostName
11/16	20171116.01	OSX10.12	GetHostByName_HostName & TryGetAddrInfo_HostName
11/16	20171116.02	Suse42.2	GetHostByName_HostName & TryGetAddrInfo_HostName
12/3	20171203.01	OSX10.12	GetHostByName_HostName & TryGetAddrInfo_HostName

Original report

This is in 2.0 on Ubuntu 1604.

https://mc.dot.net/#/product/netcore/200/source/official~2Fcorefx~2Frelease~2F2.0.0~2F/type/test~2Ffunctional~2Fportable~2Fcli~2F/build/20170524.02/workItem/System.Net.WebProxy.Tests/analysis/xunit/System.Net.Tests.WebProxyTest~2FBypassOnLocal_MatchesExpected

Unhandled Exception of Type System.Net.Internals.SocketExceptionFactory+ExtendedSocketException
Message :
System.Net.Internals.SocketExceptionFactory+ExtendedSocketException : No such device or address
Stack Trace :
   at System.Net.Dns.InternalGetHostByName(String hostName, Boolean includeIPv6) in /root/corefx/src/System.Net.NameResolution/src/System/Net/DNS.cs:line 46
   at System.Net.Dns.ResolveCallback(Object context) in /root/corefx/src/System.Net.NameResolution/src/System/Net/DNS.cs:line 290
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Net.Dns.HostResolutionEndHelper(IAsyncResult asyncResult) in /root/corefx/src/System.Net.NameResolution/src/System/Net/DNS.cs:line 420
   at System.Net.Dns.EndGetHostEntry(IAsyncResult asyncResult) in /root/corefx/src/System.Net.NameResolution/src/System/Net/DNS.cs:line 562
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Net.Tests.WebProxyTest.<BypassOnLocal_MemberData>d__10.MoveNext()
   at System.Linq.Enumerable.SelectEnumerableIterator`2.MoveNext() in /root/corefx/src/System.Linq/src/System/Linq/Select.cs:line 133