storage/remote/wal_watcher.go
func (w *WALWatcher) Stop() {
	close(w.quit)
	<-w.done

	// Records read metric has series and samples.
	watcherRecordsRead.DeleteLabelValues(w.name, "series")
	watcherRecordsRead.DeleteLabelValues(w.name, "samples")
	watcherRecordDecodeFails.DeleteLabelValues(w.name)
	watcherSamplesSentPreTailing.DeleteLabelValues(w.name)
	watcherCurrentSegment.DeleteLabelValues(w.name)

	level.Info(w.logger).Log("msg", "WAL watcher stopped", "queue", w.name)
}
func (w *WALWatcher) Stop() {
	close(w.quit)
	<-w.done

	// Records read metric has series and samples.
	watcherRecordsRead.DeleteLabelValues(w.name, "series")
	watcherRecordsRead.DeleteLabelValues(w.name, "samples")
	watcherRecordDecodeFails.DeleteLabelValues(w.name)
	watcherSamplesSentPreTailing.DeleteLabelValues(w.name)
	watcherCurrentSegment.DeleteLabelValues(w.name)

	level.Info(w.logger).Log("msg", "WAL watcher stopped", "queue", w.name)
}
// Stop the WALWatcher.