From c278bac26388bb35030e87562bc91a13290ec68e Mon Sep 17 00:00:00 2001
From: chrislu <chris.lu@gmail.com>
Date: Fri, 7 Jul 2023 22:16:58 -0700
Subject: [PATCH] avoid nil needle map

fix https://github.com/seaweedfs/seaweedfs/issues/4640
---
 weed/storage/volume_write.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/weed/storage/volume_write.go b/weed/storage/volume_write.go
index ae607e691..56010cea2 100644
--- a/weed/storage/volume_write.go
+++ b/weed/storage/volume_write.go
@@ -197,6 +197,10 @@ func (v *Volume) syncDelete(n *needle.Needle) (Size, error) {
 	v.dataFileAccessLock.Lock()
 	defer v.dataFileAccessLock.Unlock()
 
+	if v.nm == nil {
+		return 0, nil
+	}
+
 	if MaxPossibleVolumeSize < v.nm.ContentSize()+uint64(actualSize) {
 		err := fmt.Errorf("volume size limit %d exceeded! current size is %d", MaxPossibleVolumeSize, v.nm.ContentSize())
 		return 0, err