keep alive for gRpc calls

weed/command/server.go

@@ -17,7 +17,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/gorilla/mux"
 	"github.com/soheilhy/cmux"
-	"google.golang.org/grpc"
 	"google.golang.org/grpc/reflection"
 )
 
@@ -208,7 +207,7 @@ func runServer(cmd *Command, args []string) bool {
 		httpL := m.Match(cmux.Any())
 
 		// Create your protocol servers.
-		grpcS := grpc.NewServer()
+		grpcS := util.NewGrpcServer()
 		master_pb.RegisterSeaweedServer(grpcS, ms)
 		reflection.Register(grpcS)