crypto/tls: test is flaky on Dragonfly builder #29583
Description
What version of Go are you using (go version)?
1.11
Does this issue reproduce with the latest release?
yes
What operating system and processor architecture are you using (go env)?
DragonflyBSD amd64
What did you do?
The Dragonfly builder sporadically fails on the crypto/tls test. This is a recent example:
https://build.golang.org/log/820d1356dcba0a2db4f1397b513f9ab4b744ed14
I ran this test manually enough times to get it to fail:
bin/go test -count 1 crypto/tls -test.timeout 120s -test.trace tracefile
--- FAIL: TestServerResumptionDisabled (0.00s)
--- FAIL: TestServerResumptionDisabled/TLSv12#01 (0.00s)
handshake_test.go:250: Failed to dial local connection: dial tcp 127.0.0.1:62744: connect: connection refused
panic: test timed out after 2m0s
goroutine 623 [running]:
testing.(*M).startAlarm.func1()
/home/tim/go/src/testing/testing.go:1331 +0xdf
created by time.goFunc
/home/tim/go/src/time/sleep.go:169 +0x44
goroutine 1 [chan receive, 1 minutes]:
testing.(*T).Run(0xc000597200, 0x781326, 0x10, 0x79d4c0, 0x4a3400)
/home/tim/go/src/testing/testing.go:914 +0x37e
testing.runTests.func1(0xc00010a000)
/home/tim/go/src/testing/testing.go:1154 +0x78
testing.tRunner(0xc00010a000, 0xc0000cbd90)
/home/tim/go/src/testing/testing.go:862 +0xc0
testing.runTests(0xc00000f4a0, 0x9fd240, 0x7f, 0x7f, 0x0)
/home/tim/go/src/testing/testing.go:1152 +0x2a9
testing.(*M).Run(0xc000104000, 0x0)
/home/tim/go/src/testing/testing.go:1069 +0x162
crypto/tls.TestMain(0xc000104000)
/home/tim/go/src/crypto/tls/handshake_test.go:266 +0x166
main.main()
_testmain.go:300 +0x13e
goroutine 377 [chan receive, 1 minutes]:
testing.(*T).Parallel(0xc00010a600)
/home/tim/go/src/testing/testing.go:767 +0x1d9
crypto/tls.TestHandshakeRace(0xc00010a600)
/home/tim/go/src/crypto/tls/handshake_client_test.go:1720 +0x35
testing.tRunner(0xc00010a600, 0x79d600)
/home/tim/go/src/testing/testing.go:862 +0xc0
created by testing.(*T).Run
/home/tim/go/src/testing/testing.go:913 +0x357
goroutine 620 [chan receive, 1 minutes]:
testing.tRunner.func1(0xc000597200)
/home/tim/go/src/testing/testing.go:838 +0x1f5
testing.tRunner(0xc000597200, 0x79d4c0)
/home/tim/go/src/testing/testing.go:866 +0xca
created by testing.(*T).Run
/home/tim/go/src/testing/testing.go:913 +0x357
goroutine 622 [IO wait, 1 minutes]:
internal/poll.runtime_pollWait(0x800ccefc8, 0x72, 0x0)
/home/tim/go/src/runtime/netpoll.go:182 +0x56
internal/poll.(*pollDesc).wait(0xc000104098, 0x72, 0x0, 0x0, 0x77e644)
/home/tim/go/src/internal/poll/fd_poll_runtime.go:87 +0x9b
internal/poll.(*pollDesc).waitRead(...)
/home/tim/go/src/internal/poll/fd_poll_runtime.go:92
internal/poll.(*FD).Accept(0xc000104080, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
/home/tim/go/src/internal/poll/fd_unix.go:384 +0x1ba
net.(*netFD).accept(0xc000104080, 0xc0001fa900, 0xc000034f98, 0x66d9c0)
/home/tim/go/src/net/fd_unix.go:238 +0x42
net.(*TCPListener).accept(0xc000010038, 0xc00005b680, 0x571b9, 0x253812a1)
/home/tim/go/src/net/tcpsock_posix.go:139 +0x32
net.(*TCPListener).Accept(0xc000010038, 0x77e225, 0xc0004b2a80, 0x77e44c, 0x4a3416)
/home/tim/go/src/net/tcpsock.go:260 +0x48
crypto/tls.localPipe.func1(0x801720, 0xc000597300, 0xc000254420)
/home/tim/go/src/crypto/tls/handshake_test.go:241 +0x41
created by crypto/tls.localPipe
/home/tim/go/src/crypto/tls/handshake_test.go:240 +0xde
goroutine 621 [chan receive, 1 minutes]:
crypto/tls.localPipe(0x801720, 0xc000597300, 0x0, 0x0, 0x0, 0x0)
/home/tim/go/src/crypto/tls/handshake_test.go:252 +0x2b2
crypto/tls.(*serverTest).run(0xc0004b2af0, 0xc000597300, 0x0)
/home/tim/go/src/crypto/tls/handshake_server_test.go:654 +0x1298
crypto/tls.runServerTestForVersion.func1(0xc000597300)
/home/tim/go/src/crypto/tls/handshake_server_test.go:760 +0x263
testing.tRunner(0xc000597300, 0xc000152570)
/home/tim/go/src/testing/testing.go:862 +0xc0
created by testing.(*T).Run
/home/tim/go/src/testing/testing.go:913 +0x357
goroutine 641 [chan send, 1 minutes]:
crypto/tls.localPipe.func1(0x801720, 0xc0005a4000, 0xc000182960)
/home/tim/go/src/crypto/tls/handshake_test.go:245 +0x124
created by crypto/tls.localPipe
/home/tim/go/src/crypto/tls/handshake_test.go:240 +0xde
FAIL crypto/tls 120.066s