fix some bugs

call.go

@@ -34,14 +34,14 @@
 package grpc
 
 import (
-	"io"
-	"net"
-
 	"github.com/golang/protobuf/proto"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/transport"
+	"io"
+	"log"
+	"net"
 )
 
 // recv receives and parses an RPC response.
@@ -127,8 +127,10 @@ func Invoke(ctx context.Context, method string, args, reply proto.Message, cc *C
 		Last:  true,
 		Delay: false,
 	}
-	ts := 0
-	var lastErr error // record the error that happened
+	var (
+		ts      int   // track the transport sequence number
+		lastErr error // record the error that happened
+	)
 	for {
 		var (
 			err    error
@@ -165,6 +167,7 @@ func Invoke(ctx context.Context, method string, args, reply proto.Message, cc *C
 		}
 		t.CloseStream(stream, lastErr)
 		if lastErr != nil {
+			log.Println("exit 5: ", lastErr)
 			return toRPCErr(lastErr)
 		}
 		return Errorf(stream.StatusCode(), stream.StatusDesc())