From 9a6aa00e9d1178fb85105dbe1505619b02723015 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Mon, 10 May 2021 02:39:52 -0700
Subject: [PATCH] avoid nil locations

fix https://github.com/chrislusf/seaweedfs/issues/2059
---
 weed/topology/topology_event_handling.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/weed/topology/topology_event_handling.go b/weed/topology/topology_event_handling.go
index e4eb430fe..2f4fba932 100644
--- a/weed/topology/topology_event_handling.go
+++ b/weed/topology/topology_event_handling.go
@@ -49,7 +49,12 @@ func (t *Topology) SetVolumeCapacityFull(volumeInfo *storage.VolumeInfo) bool {
 	vl.accessLock.RLock()
 	defer vl.accessLock.RUnlock()
 
-	for _, dn := range vl.vid2location[volumeInfo.Id].list {
+	vidLocations, found := vl.vid2location[volumeInfo.Id]
+	if !found {
+		return false
+	}
+
+	for _, dn := range vidLocations.list {
 		if !volumeInfo.ReadOnly {
 
 			disk := dn.getOrCreateDisk(volumeInfo.DiskType)