From 7f67bf593fea50939df1fd891234e8b52f8fa158 Mon Sep 17 00:00:00 2001
From: Steve Nardone <snardone@gmail.com>
Date: Tue, 30 May 2017 14:02:26 -0400
Subject: [PATCH] Fix panic in mongo input (#2848)

(cherry picked from commit e7f9db297eb309f722597023a73d175e5ff81431)
---
 plugins/inputs/mongodb/mongostat.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/inputs/mongodb/mongostat.go b/plugins/inputs/mongodb/mongostat.go
index c5ccf5a86..bddd3fda9 100644
--- a/plugins/inputs/mongodb/mongostat.go
+++ b/plugins/inputs/mongodb/mongostat.go
@@ -564,7 +564,7 @@ func NewStatLine(oldMongo, newMongo MongoStatus, key string, all bool, sampleSec
 		// BEGIN code modification
 		if newStat.Repl.IsMaster.(bool) {
 			returnVal.NodeType = "PRI"
-		} else if newStat.Repl.Secondary.(bool) {
+		} else if newStat.Repl.Secondary != nil && newStat.Repl.Secondary.(bool) {
 			returnVal.NodeType = "SEC"
 		} else if newStat.Repl.ArbiterOnly != nil && newStat.Repl.ArbiterOnly.(bool) {
 			returnVal.NodeType = "ARB"