fix: timeout and metrics push

Author: joker-star-l

exporter/dorisexporter/exporter_common.go

@@ -82,6 +82,9 @@ func streamLoadRequest(ctx context.Context, cfg *Config, table string, data []by
 	req.Header.Set("format", "json")
 	req.Header.Set("Expect", "100-continue")
 	req.Header.Set("strip_outer_array", "true")
+	if cfg.ClientConfig.Timeout != 0 {
+		req.Header.Set("timeout", fmt.Sprintf("%d", cfg.ClientConfig.Timeout/time.Second))
+	}
 	req.SetBasicAuth(cfg.Username, string(cfg.Password))
 
 	return req, nil

exporter/dorisexporter/exporter_metrics.go

@@ -145,6 +145,10 @@ func (e *metricsExporter) pushMetricDataParallel(ctx context.Context, metricMap
 	errChan := make(chan error, len(metricMap))
 	wg := &sync.WaitGroup{}
 	for _, m := range metricMap {
+		if m.size() <= 0 {
+			continue
+		}
+
 		wg.Add(1)
 		go func(m metricModel, wg *sync.WaitGroup) {
 			errChan <- e.pushMetricDataInternal(ctx, m)