mongodb input: fix version 2.2 panic

closes #1628
influxdata · Sep 6, 2016 · 526889a · 526889a
1 parent 6b1cc67
commit 526889a
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -20,6 +20,7 @@
 
 ### Bugfixes
 
+- [#1628](https://github.com/influxdata/telegraf/issues/1628): Fix mongodb input panic on version 2.2.
 
 ## v1.0 [unreleased]
 

diff --git a/plugins/inputs/mongodb/mongostat.go b/plugins/inputs/mongodb/mongostat.go
@@ -514,7 +514,7 @@ func NewStatLine(oldMongo, newMongo MongoStatus, key string, all bool, sampleSec
 		returnVal.Command = diff(newStat.Opcounters.Command, oldStat.Opcounters.Command, sampleSecs)
 	}
 
-	if newStat.Metrics.TTL != nil && oldStat.Metrics.TTL != nil {
+	if newStat.Metrics != nil && newStat.Metrics.TTL != nil && oldStat.Metrics.TTL != nil {
 		returnVal.Passes = diff(newStat.Metrics.TTL.Passes, oldStat.Metrics.TTL.Passes, sampleSecs)
 		returnVal.DeletedDocuments = diff(newStat.Metrics.TTL.DeletedDocuments, oldStat.Metrics.TTL.DeletedDocuments, sampleSecs)
 	}