Use local Random instance, and seed it

client.go

@@ -1,7 +1,6 @@
 package sarama
 
 import (
-	"math/rand"
 	"sort"
 	"sync"
 	"time"
@@ -119,7 +118,7 @@ func NewClient(addrs []string, conf *Config) (Client, error) {
 		coordinators:            make(map[string]int32),
 	}
 
-	for _, index := range rand.Perm(len(addrs)) {
+	for _, index := range Random.Perm(len(addrs)) {
 		client.seedBrokers = append(client.seedBrokers, NewBroker(addrs[index]))
 	}
 

sarama.go

@@ -15,13 +15,17 @@ package sarama
 import (
 	"io/ioutil"
 	"log"
+	"math/rand"
+	"time"
 )
 
 // Logger is the instance of a StdLogger interface that Sarama writes connection
 // management events to. By default it is set to discard all log messages via ioutil.Discard,
 // but you can set it to redirect wherever you want.
 var Logger StdLogger = log.New(ioutil.Discard, "[Sarama] ", log.LstdFlags)
 
+var Random = rand.New(rand.NewSource(time.Now().UnixNano()))
+
 // StdLogger is used to log error messages.
 type StdLogger interface {
 	Print(v ...interface{})