From cd568548fda669f268c6a2e299e9a9fefb7eb720 Mon Sep 17 00:00:00 2001
From: Jason Wilder <mail@jasonwilder.com>
Date: Fri, 12 Feb 2016 12:06:23 -0700
Subject: [PATCH] Fix race in peerStore

---
 services/meta/raft_state.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/services/meta/raft_state.go b/services/meta/raft_state.go
index 6d7140bb3c..720555c793 100644
--- a/services/meta/raft_state.go
+++ b/services/meta/raft_state.go
@@ -325,14 +325,19 @@ func (l *raftLayer) Close() error { return l.ln.Close() }
 
 // peerStore is an in-memory implementation of raft.PeerStore
 type peerStore struct {
+	mu    sync.RWMutex
 	peers []string
 }
 
 func (m *peerStore) Peers() ([]string, error) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
 	return m.peers, nil
 }
 
 func (m *peerStore) SetPeers(peers []string) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
 	m.peers = peers
 	return nil
 }