FAQ
I wrote a function that calls multiple rpc servers with the same args and
reply and returns the first one that comes back. Is this a bad idea? Is
it possible that the reply will get corrupted since there will be multiple
calls to client.codec.ReadResponseBody(call.Reply)?

Here is the function:

func FirstTimeout(hosts []string, method string, args interface{}, reply
interface{}, timeout time.Duration) error {
ch := make(chan *rpc.Call, len(hosts))
numCalls := 0
var oerr error
for _, host := range hosts {
c, err := clientcache.Client(host)
if err != nil {
oerr = err
continue
}
c.Go(method, args, reply, ch)
numCalls++
}

if numCalls == 0 {
return oerr
}

select {
case r := <-ch:
reply = r.Reply
return r.Error
case <-time.After(timeout):
return fmt.Errorf("timeout calling %s on %v (%s)", method, hosts, timeout)
}

panic("never reached")
}

Thanks!

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