use AddError everywhere (#2372)

plugins/inputs/exec/exec.go

@@ -15,7 +15,6 @@ import (
 
 	"github.com/influxdata/telegraf"
 	"github.com/influxdata/telegraf/internal"
-	"github.com/influxdata/telegraf/internal/errchan"
 	"github.com/influxdata/telegraf/plugins/inputs"
 	"github.com/influxdata/telegraf/plugins/parsers"
 	"github.com/influxdata/telegraf/plugins/parsers/nagios"
@@ -49,8 +48,7 @@ type Exec struct {
 
 	parser parsers.Parser
 
-	runner  Runner
-	errChan chan error
+	runner Runner
 }
 
 func NewExec() *Exec {
@@ -150,13 +148,13 @@ func (e *Exec) ProcessCommand(command string, acc telegraf.Accumulator, wg *sync
 
 	out, err := e.runner.Run(e, command, acc)
 	if err != nil {
-		e.errChan <- err
+		acc.AddError(err)
 		return
 	}
 
 	metrics, err := e.parser.Parse(out)
 	if err != nil {
-		e.errChan <- err
+		acc.AddError(err)
 	} else {
 		for _, metric := range metrics {
 			acc.AddFields(metric.Name(), metric.Fields(), metric.Tags(), metric.Time())
@@ -193,7 +191,8 @@ func (e *Exec) Gather(acc telegraf.Accumulator) error {
 
 		matches, err := filepath.Glob(cmdAndArgs[0])
 		if err != nil {
-			return err
+			acc.AddError(err)
+			continue
 		}
 
 		if len(matches) == 0 {
@@ -214,15 +213,12 @@ func (e *Exec) Gather(acc telegraf.Accumulator) error {
 		}
 	}
 
-	errChan := errchan.New(len(commands))
-	e.errChan = errChan.C
-
 	wg.Add(len(commands))
 	for _, command := range commands {
 		go e.ProcessCommand(command, acc, &wg)
 	}
 	wg.Wait()
-	return errChan.Error()
+	return nil
 }
 
 func init() {

plugins/inputs/exec/exec_test.go

@@ -101,7 +101,7 @@ func TestExec(t *testing.T) {
 	}
 
 	var acc testutil.Accumulator
-	err := e.Gather(&acc)
+	err := acc.GatherError(e.Gather)
 	require.NoError(t, err)
 	assert.Equal(t, acc.NFields(), 8, "non-numeric measurements should be ignored")
 
@@ -127,8 +127,7 @@ func TestExecMalformed(t *testing.T) {
 	}
 
 	var acc testutil.Accumulator
-	err := e.Gather(&acc)
-	require.Error(t, err)
+	require.Error(t, acc.GatherError(e.Gather))
 	assert.Equal(t, acc.NFields(), 0, "No new points should have been added")
 }
 
@@ -141,8 +140,7 @@ func TestCommandError(t *testing.T) {
 	}
 
 	var acc testutil.Accumulator
-	err := e.Gather(&acc)
-	require.Error(t, err)
+	require.Error(t, acc.GatherError(e.Gather))
 	assert.Equal(t, acc.NFields(), 0, "No new points should have been added")
 }
 
@@ -155,8 +153,7 @@ func TestLineProtocolParse(t *testing.T) {
 	}
 
 	var acc testutil.Accumulator
-	err := e.Gather(&acc)
-	require.NoError(t, err)
+	require.NoError(t, acc.GatherError(e.Gather))
 
 	fields := map[string]interface{}{
 		"usage_idle": float64(99),
@@ -191,7 +188,7 @@ func TestLineProtocolShortParse(t *testing.T) {
 	}
 
 	var acc testutil.Accumulator
-	err := e.Gather(&acc)
+	err := acc.GatherError(e.Gather)
 	require.Error(t, err)
 	assert.Contains(t, err.Error(), "buffer too short", "A buffer too short error was expected")
 }
@@ -205,7 +202,7 @@ func TestLineProtocolParseMultiple(t *testing.T) {
 	}
 
 	var acc testutil.Accumulator
-	err := e.Gather(&acc)
+	err := acc.GatherError(e.Gather)
 	require.NoError(t, err)
 
 	fields := map[string]interface{}{
@@ -231,7 +228,7 @@ func TestExecCommandWithGlob(t *testing.T) {
 	e.SetParser(parser)
 
 	var acc testutil.Accumulator
-	err := e.Gather(&acc)
+	err := acc.GatherError(e.Gather)
 	require.NoError(t, err)
 
 	fields := map[string]interface{}{
@@ -247,7 +244,7 @@ func TestExecCommandWithoutGlob(t *testing.T) {
 	e.SetParser(parser)
 
 	var acc testutil.Accumulator
-	err := e.Gather(&acc)
+	err := acc.GatherError(e.Gather)
 	require.NoError(t, err)
 
 	fields := map[string]interface{}{
@@ -263,7 +260,7 @@ func TestExecCommandWithoutGlobAndPath(t *testing.T) {
 	e.SetParser(parser)
 
 	var acc testutil.Accumulator
-	err := e.Gather(&acc)
+	err := acc.GatherError(e.Gather)
 	require.NoError(t, err)
 
 	fields := map[string]interface{}{