[extension/jaegerremotesampling] fix: wait for autoUpdateStrategies in Close function

extension/jaegerremotesampling/internal/source/filesource/filesource.go

@@ -13,6 +13,7 @@ import (
 	"net/url"
 	"os"
 	"path/filepath"
+	"sync"
 	"sync/atomic"
 	"time"
 
@@ -34,6 +35,8 @@ type samplingProvider struct {
 	cancelFunc context.CancelFunc
 
 	options Options
+
+	wg sync.WaitGroup
 }
 
 type storedStrategies struct {
@@ -96,6 +99,7 @@ func (h *samplingProvider) GetSamplingStrategy(_ context.Context, serviceName st
 // Close stops updating the strategies
 func (h *samplingProvider) Close() error {
 	h.cancelFunc()
+	h.wg.Wait()
 	return nil
 }
 
@@ -156,6 +160,9 @@ func (h *samplingProvider) samplingStrategyLoader(strategiesFile string) strateg
 }
 
 func (h *samplingProvider) autoUpdateStrategies(ctx context.Context, interval time.Duration, loader strategyLoader) {
+	h.wg.Add(1)
+	defer h.wg.Done()
+
 	lastValue := string(nullJSON)
 	ticker := time.NewTicker(interval)
 	defer ticker.Stop()