processes: Don't return error if process exited (#1283)

CHANGELOG.md

@@ -34,6 +34,7 @@ time before a new metric is included by the plugin.
 - [#1221](https://github.com/influxdata/telegraf/pull/1221): Fix influxdb n_shards counter.
 - [#1258](https://github.com/influxdata/telegraf/pull/1258): Fix potential kernel plugin integer parse error.
 - [#1268](https://github.com/influxdata/telegraf/pull/1268): Fix potential influxdb input type assertion panic.
+- [#1283](https://github.com/influxdata/telegraf/pull/1283): Still send processes metrics if a process exited during metric collection.
 
 ## v0.13.1 [2016-05-24]
 

plugins/inputs/system/processes.go

@@ -141,6 +141,9 @@ func (p *Processes) gatherFromProc(fields map[string]interface{}) error {
 		statFile := path.Join("/proc", file.Name(), "stat")
 		data, err := p.readProcFile(statFile)
 		if err != nil {
+			if !file.IsDir() {
+				continue
+			}
 			return err
 		}
 		if data == nil {