From 78678f4bcb7aa6b18cd364f86135b54e2d633f24 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=9C=8D=E6=99=93=E6=A0=8B?= <huoxd@jiedaibao.com>
Date: Mon, 25 Jul 2016 11:40:35 +0800
Subject: [PATCH] deleted needle does not need checksum verification

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

diff --git a/weed/storage/needle_read_write.go b/weed/storage/needle_read_write.go
index 2f26147d6..3ac236951 100644
--- a/weed/storage/needle_read_write.go
+++ b/weed/storage/needle_read_write.go
@@ -158,6 +158,9 @@ func (n *Needle) ReadData(r *os.File, offset int64, size uint32, version Version
 	case Version2:
 		n.readNeedleDataVersion2(bytes[NeedleHeaderSize : NeedleHeaderSize+int(n.Size)])
 	}
+	if size == 0 {
+		return nil
+	}
 	checksum := util.BytesToUint32(bytes[NeedleHeaderSize+size : NeedleHeaderSize+size+NeedleChecksumSize])
 	newChecksum := NewCRC(n.Data)
 	if checksum != newChecksum.Value() {