From 7afc490c95789c408fbc256d8e790273d331c984 Mon Sep 17 00:00:00 2001
From: Alexander Morozov <lk4d4math@gmail.com>
Date: Tue, 15 Nov 2016 15:38:03 -0800
Subject: [PATCH] raft: return empty status if node is stopped

If the node is stopped, then Status can hang forever because there is no
event loop to answer. So, just return empty status to avoid deadlocks.

Fix #6855

Signed-off-by: Alexander Morozov <lk4d4math@gmail.com>
---
 raft/node.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/raft/node.go b/raft/node.go
index 5fce58457..c8410fdc7 100644
--- a/raft/node.go
+++ b/raft/node.go
@@ -462,8 +462,12 @@ func (n *node) ApplyConfChange(cc pb.ConfChange) *pb.ConfState {
 
 func (n *node) Status() Status {
 	c := make(chan Status)
-	n.status <- c
-	return <-c
+	select {
+	case n.status <- c:
+		return <-c
+	case <-n.done:
+		return Status{}
+	}
 }
 
 func (n *node) ReportUnreachable(id uint64) {