From c564b18482ac44580c27085bb0439c098a3ecd2e Mon Sep 17 00:00:00 2001
From: Derek Collison <derek@nats.io>
Date: Fri, 26 Mar 2021 05:28:00 -0700
Subject: [PATCH] Protect against negative

Signed-off-by: Derek Collison <derek@nats.io>
---
 server/jetstream_cluster.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/server/jetstream_cluster.go b/server/jetstream_cluster.go
index cdb0f86b..d7f8545f 100644
--- a/server/jetstream_cluster.go
+++ b/server/jetstream_cluster.go
@@ -4486,6 +4486,9 @@ func (js *jetStream) clusterInfo(rg *raftGroup) *ClusterInfo {
 	for _, rp := range peers {
 		if rp.ID != id && rg.isMember(rp.ID) {
 			lastSeen := now.Sub(rp.Last)
+			if lastSeen < 0 {
+				lastSeen = 1
+			}
 			current := rp.Current
 			if current && lastSeen > lostQuorumInterval {
 				current = false