diff --git a/cluster/router/condition_router.go b/cluster/router/condition_router.go
index a196ceb5771422f06a820986a02499f9fe3523dc..efae65ccb34eb8a78e281cfaf7b1fcec79b3d163 100644
--- a/cluster/router/condition_router.go
+++ b/cluster/router/condition_router.go
@@ -156,10 +156,13 @@ func parseRule(rule string) (map[string]MatchPair, error) {
 	if len(rule) == 0 {
 		return condition, nil
 	}
-	var pair MatchPair
+
+	var (
+		pair       MatchPair
+		startIndex int
+	)
 	values := gxset.NewSet()
 	reg := regexp.MustCompile(`([&!=,]*)\s*([^&!=,\s]+)`)
-	var startIndex = 0
 	if indexTuple := reg.FindIndex([]byte(rule)); len(indexTuple) > 0 {
 		startIndex = indexTuple[0]
 	}
@@ -227,7 +230,7 @@ func MatchCondition(pairs map[string]MatchPair, url *common.URL, param *common.U
 	if sample == nil {
 		return true, perrors.Errorf("url is not allowed be nil")
 	}
-	result := false
+	var result bool
 	for key, matchPair := range pairs {
 		var sampleValue string
 
diff --git a/common/extension/filter.go b/common/extension/filter.go
index e2a66c7449448a2229c53eabb478f2c96a429bc7..93f7f8cf7ccc4108fe1120b685fad36a2f9f83df 100644
--- a/common/extension/filter.go
+++ b/common/extension/filter.go
@@ -33,7 +33,7 @@ func SetFilter(name string, v func() filter.Filter) {
 
 func GetFilter(name string) filter.Filter {
 	if filters[name] == nil {
-		panic("filter for " + name + " is not existing, make sure you have import the package.")
+		panic("filter for " + name + " is not existing, make sure you have imported the package.")
 	}
 	return filters[name]()
 }
diff --git a/filter/impl/tps/impl/tps_limit_fix_window_strategy.go b/filter/impl/tps/impl/tps_limit_fix_window_strategy.go
index 7290619d5551ebe29209e7cfa717bd66442ca2df..b4dd81512e8f00af46b1f9974cdfeabe6eac2364 100644
--- a/filter/impl/tps/impl/tps_limit_fix_window_strategy.go
+++ b/filter/impl/tps/impl/tps_limit_fix_window_strategy.go
@@ -21,6 +21,7 @@ import (
 	"sync/atomic"
 	"time"
 )
+
 import (
 	"github.com/apache/dubbo-go/common/constant"
 	"github.com/apache/dubbo-go/common/extension"