From 08e47025427bf2764cf06853e169398ee84b7b09 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Tue, 4 Feb 2020 10:38:12 -0800
Subject: [PATCH] sync before closing index file

merge from https://github.com/stlpmo-jn/seaweedfs/commit/0181f87d9142852f981541cb05689df9fc9ef6a0
---
 weed/storage/needle_map_memory.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/weed/storage/needle_map_memory.go b/weed/storage/needle_map_memory.go
index 37dee7889..84197912f 100644
--- a/weed/storage/needle_map_memory.go
+++ b/weed/storage/needle_map_memory.go
@@ -64,6 +64,10 @@ func (nm *NeedleMap) Delete(key NeedleId, offset Offset) error {
 	return nm.appendToIndexFile(key, offset, TombstoneFileSize)
 }
 func (nm *NeedleMap) Close() {
+	indexFileName := nm.indexFile.Name()
+	if err := nm.indexFile.Sync(); err != nil {
+		glog.Warningf("sync file %s failed, %v", indexFileName, err)
+	}
 	_ = nm.indexFile.Close()
 }
 func (nm *NeedleMap) Destroy() error {