all goroutines are asleep - deadlock

Question

For one of my requirement I have to create N number of worker go routines, which will be monitored by one monitoring routine. monitoring routine has to end when all worker routines completes. My code ending in deadlock, please help.

import "fmt"
import "sync"
import "strconv"

func worker(wg *sync.WaitGroup, cs chan string, i int ){
    defer wg.Done()
    cs<-"worker"+strconv.Itoa(i)    
}

func monitorWorker(wg *sync.WaitGroup, cs chan string) {
    defer wg.Done()
    for i:= range cs {
            fmt.Println(i)
     }
}
func main() {
    wg := &sync.WaitGroup{}
    cs := make(chan string)

    for i:=0;i<10;i++{
             wg.Add(1)
             go worker(wg,cs,i)
    } 

    wg.Add(1)
    go monitorWorker(wg,cs)
    wg.Wait()
}

Answer 1

When I changed my channel definition from

strChan := make(chan string)

to

strChan := make(chan string, 1)

I was able to fix this error

Answer 2

If you know the count of the messages channel receives then simply you can limit your loop;

//c is channel
for a := 1; a <= 3; a++{
        fmt.Println(<-c)
}

Also you can pass another channel(status of the worker) to the worker then conditionally stop the loop that causes deadlock.

Ps: it's just an additional quick solution. Not specifically addresses your solution.