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fix:fix data race bug when collecting metrics #402

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fix:fix data race bug when collecting metrics #402

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5 changes: 4 additions & 1 deletion kafka_exporter.go
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@ import (
"time"

"github.com/Shopify/sarama"
kingpin "github.com/alecthomas/kingpin/v2"
"github.com/alecthomas/kingpin/v2"
"github.com/krallistic/kazoo-go"
"github.com/pkg/errors"
"github.com/prometheus/client_golang/prometheus"
Expand Down Expand Up @@ -342,13 +342,16 @@ func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
func (e *Exporter) collectChans(quit chan struct{}) {
original := make(chan prometheus.Metric)
container := make([]prometheus.Metric, 0, 100)
done := make(chan struct{})
go func() {
for metric := range original {
container = append(container, metric)
}
close(done)
}()
e.collect(original)
close(original)
<-done
// Lock to avoid modification on the channel slice
e.sgMutex.Lock()
for _, ch := range e.sgChans {
Expand Down