net/http: TestTransportPersistConnLeak test failure/flake on windows 2003 #14375
Comments
ianlancetaylor
changed the title
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Note that you can still use your Go installation, despite this test failure. |
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Hm. I haven't seen that one, or at least not in ages. I wonder what they are. |
bradfitz
changed the title
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transport_test.go line 1022: ALL TESTS PASSED |
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I can reproduce this: Am I seeing some unclosed network connections? Brad let me know, if you want me to try something. Alex |
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That's too hard to read. I only want to see the new goroutines. See the leak check stuff I added in grpc: https://github.com/grpc/grpc-go/blob/master/test/end2end_test.go // interestingGoroutines returns all goroutines we care about for the purpose
// of leak checking. It excludes testing or runtime ones.
func interestingGoroutines() (gs []string) {
buf := make([]byte, 2<<20)
buf = buf[:runtime.Stack(buf, true)]
for _, g := range strings.Split(string(buf), "\n\n") {
sl := strings.SplitN(g, "\n", 2)
if len(sl) != 2 {
continue
}
stack := strings.TrimSpace(sl[1])
if strings.HasPrefix(stack, "testing.RunTests") {
continue
}
if stack == "" ||
strings.Contains(stack, "testing.Main(") ||
strings.Contains(stack, "runtime.goexit") ||
strings.Contains(stack, "created by runtime.gc") ||
strings.Contains(stack, "interestingGoroutines") ||
strings.Contains(stack, "runtime.MHeap_Scavenger") {
continue
}
gs = append(gs, g)
}
sort.Strings(gs)
return
}
// leakCheck snapshots the currently-running goroutines and returns a
// function to be run at the end of tests to see whether any
// goroutines leaked.
func leakCheck(t testing.TB) func() {
orig := map[string]bool{}
for _, g := range interestingGoroutines() {
orig[g] = true
}
return func() {
// Loop, waiting for goroutines to shut down.
// Wait up to 5 seconds, but finish as quickly as possible.
deadline := time.Now().Add(5 * time.Second)
for {
var leaked []string
for _, g := range interestingGoroutines() {
if !orig[g] {
leaked = append(leaked, g)
}
}
if len(leaked) == 0 {
return
}
if time.Now().Before(deadline) {
time.Sleep(50 * time.Millisecond)
continue
}
for _, g := range leaked {
t.Errorf("Leaked goroutine: %v", g)
}
return
}
}
} |
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Sorry for late reply (I lost your reply). I have added leakCheck, but the package already has interestingGoroutines. The TestTransportPersistConnLeak know fails every time - I am sure that is not what you want. Please, let me know what to do. Thank you. Alex |
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ok net 23.938s
--- FAIL: TestTransportPersistConnLeak (0.17s)
transport_test.go:1032: goroutine growth: 24 -> 121 -> 36 (delta: 12)
transport_test.go:1033: too many new goroutines
FAIL
FAIL net/http 19.625s
ok net/http/cgi 2.000s
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