From badd8fdf8f049aade0ae17b9cbf1988802cffc7b Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Tue, 8 Jan 2019 09:03:28 -0800
Subject: [PATCH] shortcut for empty file

---
 weed/storage/volume_read_write.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/weed/storage/volume_read_write.go b/weed/storage/volume_read_write.go
index b44900dd4..32062db46 100644
--- a/weed/storage/volume_read_write.go
+++ b/weed/storage/volume_read_write.go
@@ -145,6 +145,9 @@ func (v *Volume) readNeedle(n *Needle) (int, error) {
 	if nv.Size == TombstoneFileSize {
 		return -1, errors.New("already deleted")
 	}
+	if nv.Size == 0 {
+		return 0, nil
+	}
 	err := n.ReadData(v.dataFile, int64(nv.Offset)*NeedlePaddingSize, nv.Size, v.Version())
 	if err != nil {
 		return 0, err