diff --git a/pkg/collector/handler_dcx.go b/pkg/collector/handler_dcx.go
index c4dc783..a576089 100644
--- a/pkg/collector/handler_dcx.go
+++ b/pkg/collector/handler_dcx.go
@@ -3,6 +3,8 @@ package collector
 import (
 	"github.com/go-kit/kit/log"
 	"github.com/tencentyun/tencentcloud-exporter/pkg/metric"
+	"github.com/tencentyun/tencentcloud-exporter/pkg/util"
+	"strings"
 )
 
 const (
@@ -10,6 +12,10 @@ const (
 	DcxInstanceidKey = "directConnectConnId"
 )
 
+var (
+	DcxInvalidMetricNames = []string{"rxbytes", "txbytes"}
+)
+
 func init() {
 	registerHandler(DcxNamespace, defaultHandlerEnabled, NewDcxHandler)
 }
@@ -19,6 +25,9 @@ type dcxHandler struct {
 }
 
 func (h *dcxHandler) CheckMetricMeta(meta *metric.TcmMeta) bool {
+	if util.IsStrInList(DcxInvalidMetricNames, strings.ToLower(meta.MetricName)) {
+		return false
+	}
 	return true
 }
 
diff --git a/pkg/collector/product.go b/pkg/collector/product.go
index ecca64f..f38335c 100644
--- a/pkg/collector/product.go
+++ b/pkg/collector/product.go
@@ -124,7 +124,7 @@ func (c *TcProductCollector) loadMetricsByProductConf() (err error) {
 			}
 			// 指标元数据处理, false=跳过
 			if !c.handler.CheckMetricMeta(meta) {
-				level.Error(c.logger).Log("msg", " Metric meta check fail, skip", "Namespace", c.Namespace, "name", meta.MetricName)
+				level.Warn(c.logger).Log("msg", " Metric not support, skip", "Namespace", c.Namespace, "name", meta.MetricName)
 				continue
 			}
 
@@ -143,7 +143,7 @@ func (c *TcProductCollector) loadMetricsByProductConf() (err error) {
 				}
 				// 指标过滤
 				if !c.handler.IsIncludeMetric(nm) {
-					level.Error(c.logger).Log("msg", " Metric not support, skip", "Namespace", c.Namespace, "name", nm.Meta.MetricName)
+					level.Warn(c.logger).Log("msg", " Metric not support, skip", "Namespace", c.Namespace, "name", nm.Meta.MetricName)
 					continue
 				}
 				c.MetricMap[meta.MetricName] = nm
diff --git a/pkg/metric/cache.go b/pkg/metric/cache.go
index 553b409..cbba361 100644
--- a/pkg/metric/cache.go
+++ b/pkg/metric/cache.go
@@ -1,6 +1,7 @@
 package metric
 
 import (
+	"fmt"
 	"github.com/go-kit/kit/log"
 	"github.com/go-kit/kit/log/level"
 	"strings"
@@ -20,7 +21,15 @@ func (c *TcmMetricCache) GetMeta(namespace string, name string) (*TcmMeta, error
 	if err != nil {
 		return nil, err
 	}
-	return c.metaCache[namespace][strings.ToLower(name)], nil
+	np, exists := c.metaCache[namespace]
+	if !exists {
+		return nil, fmt.Errorf("namespace cache not exists")
+	}
+	m, exists := np[strings.ToLower(name)]
+	if !exists {
+		return nil, fmt.Errorf("metric cache not exists")
+	}
+	return m, nil
 }
 
 func (c *TcmMetricCache) ListMetaByNamespace(namespace string) ([]*TcmMeta, error) {