antifreeze is a package that detects goroutines that have been waiting for too long.
Warning: this package is alpha and may not work as intended.
You can exclude functions that may block forever with antifreeze.Exclude and antifreeze.ExcludeNamed.
Example program that will panic ~1min after you have made a request to it.
package main
import (
"fmt"
"net/http"
"time"
"github.com/egonelbre/antifreeze"
)
func init() {
antifreeze.SetFrozenLimit(1 * time.Minute)
}
var ch = make(chan int)
func runner() {
antifreeze.Exclude()
<-ch
}
func main() {
go runner()
http.Handle("/", http.HandlerFunc(index))
http.ListenAndServe(":8000", nil)
}
func index(w http.ResponseWriter, r *http.Request) {
fmt.Println("R:", r)
<-ch
}See godoc for more information.