Recycle memory earlier in error case

common/net/transport.go

@@ -11,6 +11,9 @@ const (
 func ReadFrom(reader io.Reader) ([]byte, error) {
 	buffer := make([]byte, bufferSize)
 	nBytes, err := reader.Read(buffer)
+  if nBytes == 0 {
+    buffer = nil
+  }
 	return buffer[:nBytes], err
 }