UDP tests fail with timeout sending/receiving data over loopback

[mellinoe]

Hit a timeout in this test:

http://dotnet-ci.cloudapp.net/job/dotnet_corefx/job/windows_nt_debug_prtest/565/testReport/junit/System.Net.Sockets.Tests/DualMode/ReceiveFromAsyncV6BoundToSpecificV6_Success/

Stacktrace

MESSAGE:
System.TimeoutException : The operation has timed out.
+++++++++++++++++++
STACK TRACE:
at System.Net.Sockets.Tests.DualMode.ReceiveFromAsync_Helper(IPAddress listenOn, IPAddress connectTo) in d:\j\workspace\dotnet_corefx\windows_nt_debug_prtest\src\System.Net.Sockets\tests\FunctionalTests\DualModeSocketTest.cs:line 599 at System.Net.Sockets.Tests.DualMode.ReceiveFromAsyncV6BoundToSpecificV6_Success() in d:\j\workspace\dotnet_corefx\windows_nt_debug_prtest\src\System.Net.Sockets\tests\FunctionalTests\DualModeSocketTest.cs:line 536

[mellinoe]

@CIPop , @pgavlin

[SidharthNabar]

Need to investigate this test - this seems to be a test setup/infra issue, hence moving to RTM milestone.

[CIPop]

Similar to the UDP test: dotnet/corefx#5411

Test timed out. This is indicative of CPU/mem/tcp pressure on the CI machine and since it's intermittent I'll tentatively mark it as a "test bug".

To confirm we'll requires a repro with ETW traces enabled either in the CI (we need #15570 for this) or in a private environment.

[stephentoub]

http://dotnet-ci.cloudapp.net/job/dotnet_corefx/job/windows_nt_debug_prtest/1569/console

10:06:54      System.Net.Sockets.Tests.DualMode.ReceiveFromAsyncV6BoundToSpecificV6_Success [FAIL]
10:06:54         System.TimeoutException : The operation has timed out.
10:06:55         Stack Trace:
10:06:55            d:\j\workspace\dotnet_corefx\windows_nt_debug_prtest\src\System.Net.Sockets\tests\FunctionalTests\DualModeSocketTest.cs(601,0): at System.Net.Sockets.Tests.DualMode.ReceiveFromAsync_Helper(IPAddress listenOn, IPAddress connectTo)
10:06:55            d:\j\workspace\dotnet_corefx\windows_nt_debug_prtest\src\System.Net.Sockets\tests\FunctionalTests\DualModeSocketTest.cs(538,0): at System.Net.Sockets.Tests.DualMode.ReceiveFromAsyncV6BoundToSpecificV6_Success()

[ericeil]

The common theme here seems to be failures in ReceiveFromAsync_Helper, which is using UDP, not TCP. I've changed the title accordingly.

[stephentoub]

Again here:
http://dotnet-ci.cloudapp.net/job/dotnet_corefx/job/windows_nt_release_prtest/3095/consoleFull

06:05:27      System.Net.Sockets.Tests.DualMode.ReceiveFromAsyncV4BoundToAnyV4_Success [FAIL]
06:05:28         System.TimeoutException : The operation has timed out.
06:05:28         Stack Trace:
06:05:28            d:\j\workspace\windows_nt_re---5067c899\src\System.Net.Sockets\tests\FunctionalTests\DualModeSocketTest.cs(590,0): at System.Net.Sockets.Tests.DualMode.ReceiveFromAsync_Helper(IPAddress listenOn, IPAddress connectTo)

[stephentoub]

More here:
http://dotnet-ci.cloudapp.net/job/dotnet_corefx/job/windows_nt_debug_prtest/3144/consoleFull

18:14:30      System.Net.Sockets.Tests.DualMode.ReceiveFromAsyncV4BoundToAnyV4_Success [FAIL]
18:14:30         System.TimeoutException : The operation has timed out.
18:14:30         Stack Trace:
18:14:30            d:\j\workspace\windows_nt_de---06b7984d\src\System.Net.Sockets\tests\FunctionalTests\DualModeSocketTest.cs(603,0): at System.Net.Sockets.Tests.DualMode.ReceiveFromAsync_Helper(IPAddress listenOn, IPAddress connectTo)
18:14:30            d:\j\workspace\windows_nt_de---06b7984d\src\System.Net.Sockets\tests\FunctionalTests\DualModeSocketTest.cs(528,0): at System.Net.Sockets.Tests.DualMode.ReceiveFromAsyncV4BoundToAnyV4_Success()
18:14:30      System.Net.Sockets.Tests.DualMode.ReceiveFromAsyncV4BoundToSpecificV4_Success [FAIL]
18:14:30         System.TimeoutException : The operation has timed out.
18:14:30         Stack Trace:
18:14:30            d:\j\workspace\windows_nt_de---06b7984d\src\System.Net.Sockets\tests\FunctionalTests\DualModeSocketTest.cs(603,0): at System.Net.Sockets.Tests.DualMode.ReceiveFromAsync_Helper(IPAddress listenOn, IPAddress connectTo)
18:14:30            d:\j\workspace\windows_nt_de---06b7984d\src\System.Net.Sockets\tests\FunctionalTests\DualModeSocketTest.cs(521,0): at System.Net.Sockets.Tests.DualMode.ReceiveFromAsyncV4BoundToSpecificV4_Success()

[stephentoub]

Again here:
http://dotnet-ci.cloudapp.net/job/dotnet_corefx/job/windows_nt_release_prtest/3307/consoleFull

[stephentoub]

Again here:
http://dotnet-ci.cloudapp.net/job/dotnet_corefx/job/windows_nt_debug/838/consoleFull

[stephentoub]

Again here:
http://dotnet-ci.cloudapp.net/job/dotnet_corefx/job/windows_nt_release_prtest/3367/consoleFull