Add missing lock

8 years ago · 89d8467f5c
parent 8c31c6e934
commit 89d8467f5c
1 changed files with 4 additions and 0 deletions
--- a/head.go
+++ b/head.go
@ -406,6 +406,8 @@ func (h *HeadBlock) updateMapping() {
 	h.mapper.mtx.Lock()
 	defer h.mapper.mtx.Unlock()

+	h.mtx.RLock()
+
 	if h.mapper.sortable != nil && h.mapper.Len() == len(h.descs) {
 		return
 	}
@ -413,6 +415,8 @@ func (h *HeadBlock) updateMapping() {
 	cds := make([]*chunkDesc, len(h.descs))
 	copy(cds, h.descs)

+	h.mtx.RUnlock()
+
 	s := slice.SortInterface(cds, func(i, j int) bool {
 		return labels.Compare(cds[i].lset, cds[j].lset) < 0
 	})