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| package main | |
| import ( | |
| "fmt" | |
| "log" | |
| "net" | |
| "time" | |
| ) | |
| func main() { | |
| n := 0 | |
| t := time.NewTicker(time.Second) | |
| c, err := net.Dial("tcp", "localhost:8888") | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| for { | |
| select { | |
| case <-t.C: | |
| fmt.Println(n, "req/sec") | |
| n = 0 | |
| default: | |
| fmt.Fprintln(c, "10") | |
| n = n + 1 | |
| } | |
| } | |
| } |
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| package main | |
| import ( | |
| "bufio" | |
| "fmt" | |
| "log" | |
| "net" | |
| "strconv" | |
| ) | |
| func main() { | |
| ln, err := net.Listen("tcp", ":8888") | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| for { | |
| c, err := ln.Accept() | |
| if err == nil { | |
| go serve(c) | |
| } | |
| } | |
| } | |
| func fib(n int) int { | |
| if n <= 2 { | |
| return 1 | |
| } else { | |
| return fib(n-1) + fib(n-2) | |
| } | |
| } | |
| func serve(c net.Conn) { | |
| bs := bufio.NewScanner(c) | |
| for bs.Scan() { | |
| n, _ := strconv.Atoi(bs.Text()) | |
| go func() { | |
| res := fib(n) | |
| fmt.Fprintf(c, "%d: %s\n", n, strconv.Itoa(res)) | |
| }() | |
| } | |
| if bs.Err() != nil { | |
| log.Println("error") | |
| } | |
| } |
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| panic: net: inconsistent fdMutex | |
| goroutine 1145194 [running]: | |
| panic(0x126cc0, 0xc94cf02860) | |
| /usr/local/Cellar/go/1.6/libexec/src/runtime/panic.go:464 +0x3e6 | |
| net.(*fdMutex).RWLock(0xc8200620e0, 0x0, 0xc94d37f61e) | |
| /usr/local/Cellar/go/1.6/libexec/src/net/fd_mutex.go:136 +0x20c | |
| net.(*netFD).writeLock(0xc8200620e0, 0x0, 0x0) | |
| /usr/local/Cellar/go/1.6/libexec/src/net/fd_unix.go:194 +0x39 | |
| net.(*netFD).Write(0xc8200620e0, 0xc94cf02848, 0x7, 0x8, 0x0, 0x0, 0x0) | |
| /usr/local/Cellar/go/1.6/libexec/src/net/fd_unix.go:319 +0x6c | |
| net.(*conn).Write(0xc820088020, 0xc94cf02848, 0x7, 0x8, 0x0, 0x0, 0x0) | |
| /usr/local/Cellar/go/1.6/libexec/src/net/net.go:184 +0xe4 | |
| fmt.Fprintf(0x440028, 0xc820088020, 0x18bf18, 0x7, 0xc94d9e0f70, 0x2, 0x2, 0x0, 0x0, 0x0) | |
| /usr/local/Cellar/go/1.6/libexec/src/fmt/print.go:189 +0xb2 | |
| main.serve.func1(0xa, 0x489440, 0xc820088020) | |
| /Users/twexler/dev/tmp/fib.go:38 +0x1d1 | |
| created by main.serve | |
| /Users/twexler/dev/tmp/fib.go:39 +0x18d | |
| exit status 2 |
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Interestingly enough, the script that broke it continued sending data to a socket that wasn't being listened on anymore: