From 0b41fd6e716f3e8b79016f73b6dd77fdf5fcdced Mon Sep 17 00:00:00 2001
From: chavacava <salvadorcavadini+github@gmail.com>
Date: Tue, 12 Apr 2022 12:30:20 +0200
Subject: [PATCH] Fix data races in WAL replay (#10571)

Signed-off-by: chavacava <salvadorcavadini+github@gmail.com>
---
 tsdb/agent/db.go | 1 +
 tsdb/head_wal.go | 1 +
 2 files changed, 2 insertions(+)

diff --git a/tsdb/agent/db.go b/tsdb/agent/db.go
index 7d42d14feb..b0fe1f9627 100644
--- a/tsdb/agent/db.go
+++ b/tsdb/agent/db.go
@@ -410,6 +410,7 @@ func (db *DB) loadWAL(r *wal.Reader, multiRef map[chunks.HeadSeriesRef]chunks.He
 
 	go func() {
 		defer close(decoded)
+		var err error
 		for r.Next() {
 			rec := r.Record()
 			switch dec.Type(rec) {
diff --git a/tsdb/head_wal.go b/tsdb/head_wal.go
index d0fe685ffb..02f4aeadb0 100644
--- a/tsdb/head_wal.go
+++ b/tsdb/head_wal.go
@@ -133,6 +133,7 @@ func (h *Head) loadWAL(r *wal.Reader, multiRef map[chunks.HeadSeriesRef]chunks.H
 
 	go func() {
 		defer close(decoded)
+		var err error
 		for r.Next() {
 			rec := r.Record()
 			switch dec.Type(rec) {