Set timeout for master and volume non-streaming rpc

weed/operation/stats.go

@@ -2,6 +2,7 @@ package operation
 
 import (
 	"context"
+	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
 )
@@ -9,7 +10,10 @@ import (
 func Statistics(server string, req *master_pb.StatisticsRequest) (resp *master_pb.StatisticsResponse, err error) {
 
 	err = withMasterServerClient(server, func(masterClient master_pb.SeaweedClient) error {
-		grpcResponse, grpcErr := masterClient.Statistics(context.Background(), req)
+		ctx, cancel := context.WithTimeout(context.Background(), time.Duration(5*time.Second))
+		defer cancel()
+
+		grpcResponse, grpcErr := masterClient.Statistics(ctx, req)
 		if grpcErr != nil {
 			return grpcErr
 		}