diff --git a/.github/workflows/golangci-lint.yml b/.github/workflows/golangci-lint.yml
index bf0dce231..0bb619aa2 100644
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@@ -9,5 +9,5 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v2
         with:
-          version: v1.51.2
+          version: v1.55.2
           args: --timeout=5m --skip-dirs='api,test,.*/controller/(v3|v4)$,.*/bootstrap$,examples,integration' --enable gofmt,revive,gocyclo,goimports --skip-files=.*_test.go$
diff --git a/client/client.go b/client/client.go
index 5d018d03a..88b8a454f 100644
--- a/client/client.go
+++ b/client/client.go
@@ -35,7 +35,7 @@ type Client struct {
 	Cfg Config
 }
 
-func (c *Client) CommonHeaders(ctx context.Context) http.Header {
+func (c *Client) CommonHeaders(_ context.Context) http.Header {
 	var headers = make(http.Header)
 	// TODO overwrote by context values
 	if len(c.Cfg.Token) > 0 {
diff --git a/client/websocket.go b/client/websocket.go
index a9cc5ce4c..ad58425d2 100644
--- a/client/websocket.go
+++ b/client/websocket.go
@@ -29,7 +29,7 @@ import (
 	"github.com/apache/servicecomb-service-center/pkg/util"
 )
 
-func (c *LBClient) WebsocketDial(ctx context.Context, api string, headers http.Header) (conn *websocket.Conn, err error) {
+func (c *LBClient) WebsocketDial(_ context.Context, api string, headers http.Header) (conn *websocket.Conn, err error) {
 	dialer := &websocket.Dialer{TLSClientConfig: c.TLS}
 	var errs []string
 	for i := 0; i < c.Retries; i++ {
diff --git a/datasource/dependency_util.go b/datasource/dependency_util.go
index e91874657..fdb8683f0 100644
--- a/datasource/dependency_util.go
+++ b/datasource/dependency_util.go
@@ -60,7 +60,7 @@ func toString(in *discovery.MicroServiceKey) string {
 	return path.GenerateProviderDependencyRuleKey(in.Tenant, in)
 }
 
-func ParseAddOrUpdateRules(ctx context.Context, dep *Dependency, oldProviderRules *discovery.MicroServiceDependency) {
+func ParseAddOrUpdateRules(_ context.Context, dep *Dependency, oldProviderRules *discovery.MicroServiceDependency) {
 	deleteDependencyRuleList := make([]*discovery.MicroServiceKey, 0, len(oldProviderRules.Dependency))
 	createDependencyRuleList := make([]*discovery.MicroServiceKey, 0, len(dep.ProvidersRule))
 	existDependencyRuleList := make([]*discovery.MicroServiceKey, 0, len(oldProviderRules.Dependency))
@@ -83,7 +83,7 @@ func ParseAddOrUpdateRules(ctx context.Context, dep *Dependency, oldProviderRule
 	setDep(dep, createDependencyRuleList, existDependencyRuleList, deleteDependencyRuleList)
 }
 
-func ParseOverrideRules(ctx context.Context, dep *Dependency, oldProviderRules *discovery.MicroServiceDependency) {
+func ParseOverrideRules(_ context.Context, dep *Dependency, oldProviderRules *discovery.MicroServiceDependency) {
 	deleteDependencyRuleList := make([]*discovery.MicroServiceKey, 0, len(oldProviderRules.Dependency))
 	createDependencyRuleList := make([]*discovery.MicroServiceKey, 0, len(dep.ProvidersRule))
 	existDependencyRuleList := make([]*discovery.MicroServiceKey, 0, len(oldProviderRules.Dependency))
diff --git a/datasource/etcd/account.go b/datasource/etcd/account.go
index 149ce0220..280eaa744 100644
--- a/datasource/etcd/account.go
+++ b/datasource/etcd/account.go
@@ -40,7 +40,7 @@ func init() {
 	rbac.Install("embedded_etcd", NewRbacDAO)
 }
 
-func NewRbacDAO(opts rbac.Options) (rbac.DAO, error) {
+func NewRbacDAO(_ rbac.Options) (rbac.DAO, error) {
 	return &RbacDAO{}, nil
 }
 
@@ -187,7 +187,7 @@ func (ds *RbacDAO) DeleteAccount(ctx context.Context, names []string) (bool, err
 	return true, nil
 }
 
-func (ds *RbacDAO) UpdateAccount(ctx context.Context, name string, account *crbac.Account) error {
+func (ds *RbacDAO) UpdateAccount(ctx context.Context, _ string, account *crbac.Account) error {
 	var (
 		opts []etcdadpt.OpOptions
 		err  error
diff --git a/datasource/etcd/cache/filter_consumer.go b/datasource/etcd/cache/filter_consumer.go
index e16135dae..45491ecaa 100644
--- a/datasource/etcd/cache/filter_consumer.go
+++ b/datasource/etcd/cache/filter_consumer.go
@@ -30,7 +30,7 @@ func (f *ConsumerFilter) Name(ctx context.Context, _ *cache.Node) string {
 	return ctx.Value(CtxConsumerID).(string)
 }
 
-func (f *ConsumerFilter) Init(ctx context.Context, parent *cache.Node) (node *cache.Node, err error) {
+func (f *ConsumerFilter) Init(_ context.Context, _ *cache.Node) (node *cache.Node, err error) {
 	node = cache.NewNode()
 	node.Cache.Set(DepResult, &DependencyRuleItem{})
 	return
diff --git a/datasource/etcd/cache/filter_service.go b/datasource/etcd/cache/filter_service.go
index de0416df5..ff186b641 100644
--- a/datasource/etcd/cache/filter_service.go
+++ b/datasource/etcd/cache/filter_service.go
@@ -38,7 +38,7 @@ func (f *ServiceFilter) Name(ctx context.Context, _ *cache.Node) string {
 		provider.ServiceName}, "/")
 }
 
-func (f *ServiceFilter) Init(ctx context.Context, parent *cache.Node) (node *cache.Node, err error) {
+func (f *ServiceFilter) Init(_ context.Context, _ *cache.Node) (node *cache.Node, err error) {
 	node = cache.NewNode()
 	return
 }
diff --git a/datasource/etcd/cache/filter_version.go b/datasource/etcd/cache/filter_version.go
index 356a3a418..69c0dad84 100644
--- a/datasource/etcd/cache/filter_version.go
+++ b/datasource/etcd/cache/filter_version.go
@@ -39,7 +39,7 @@ func (f *VersionFilter) Name(ctx context.Context, _ *cache.Node) string {
 	return ""
 }
 
-func (f *VersionFilter) Init(ctx context.Context, parent *cache.Node) (node *cache.Node, err error) {
+func (f *VersionFilter) Init(ctx context.Context, _ *cache.Node) (node *cache.Node, err error) {
 	instance, ok := ctx.Value(CtxProviderInstanceKey).(*pb.HeartbeatSetElement)
 	if ok {
 		node = cache.NewNode()
diff --git a/datasource/etcd/cache/instance.go b/datasource/etcd/cache/instance.go
index 463f3ec4c..74525bc20 100644
--- a/datasource/etcd/cache/instance.go
+++ b/datasource/etcd/cache/instance.go
@@ -96,8 +96,8 @@ func (f *FindInstancesCache) GetWithProviderID(ctx context.Context, consumer *pb
 func (f *FindInstancesCache) Remove(provider *pb.MicroServiceKey) {
 	f.Tree.Remove(context.WithValue(context.Background(), CtxProviderKey, provider))
 	if len(provider.Alias) > 0 {
-		copy := *provider
-		copy.ServiceName = copy.Alias
-		f.Tree.Remove(context.WithValue(context.Background(), CtxProviderKey, &copy))
+		copyProvider := *provider
+		copyProvider.ServiceName = copyProvider.Alias
+		f.Tree.Remove(context.WithValue(context.Background(), CtxProviderKey, &copyProvider))
 	}
 }
diff --git a/datasource/etcd/ms.go b/datasource/etcd/ms.go
index a0096989f..e0c30c284 100644
--- a/datasource/etcd/ms.go
+++ b/datasource/etcd/ms.go
@@ -157,7 +157,7 @@ func (ds *MetadataManager) RegisterService(ctx context.Context, request *pb.Crea
 	}, nil
 }
 
-func (ds *MetadataManager) ListService(ctx context.Context, request *pb.GetServicesRequest) (
+func (ds *MetadataManager) ListService(ctx context.Context, _ *pb.GetServicesRequest) (
 	*pb.GetServicesResponse, error) {
 	services, err := eutil.GetAllServiceUtil(ctx)
 	if err != nil {
@@ -186,7 +186,7 @@ func (ds *MetadataManager) GetService(ctx context.Context, request *pb.GetServic
 	return singleService, nil
 }
 
-func (ds *MetadataManager) GetOverview(ctx context.Context, request *pb.GetServicesRequest) (
+func (ds *MetadataManager) GetOverview(ctx context.Context, _ *pb.GetServicesRequest) (
 	*pb.Statistics, error) {
 	ctx = util.WithCacheOnly(ctx)
 	st, err := statistics(ctx, false)
@@ -848,10 +848,9 @@ func (ds *MetadataManager) SendManyHeartbeat(ctx context.Context, request *pb.He
 			log.Warn(fmt.Sprintf("instance[%s/%s] is duplicate request heartbeat set",
 				heartbeatElement.ServiceId, heartbeatElement.InstanceId))
 			continue
-		} else {
-			existFlag[heartbeatElement.ServiceId+heartbeatElement.InstanceId] = true
-			noMultiCounter++
 		}
+		existFlag[heartbeatElement.ServiceId+heartbeatElement.InstanceId] = true
+		noMultiCounter++
 		gopool.Go(getHeartbeatFunc(ctx, domainProject, instancesHbRst, heartbeatElement))
 	}
 	count := 0
@@ -913,7 +912,7 @@ func (ds *MetadataManager) SendHeartbeat(ctx context.Context, request *pb.Heartb
 	return nil
 }
 
-func (ds *MetadataManager) ListManyInstances(ctx context.Context, request *pb.GetAllInstancesRequest) (*pb.GetAllInstancesResponse, error) {
+func (ds *MetadataManager) ListManyInstances(ctx context.Context, _ *pb.GetAllInstancesRequest) (*pb.GetAllInstancesResponse, error) {
 	domainProject := util.ParseDomainProject(ctx)
 	key := path.GetInstanceRootKey(domainProject) + path.SPLIT
 	opts := append(eutil.FromContext(ctx), etcdadpt.WithStrKey(key), etcdadpt.WithPrefix())
diff --git a/datasource/etcd/schema.go b/datasource/etcd/schema.go
index f32c5eb86..32488f085 100644
--- a/datasource/etcd/schema.go
+++ b/datasource/etcd/schema.go
@@ -43,7 +43,7 @@ func init() {
 	schema.Install("embedded_etcd", NewSchemaDAO)
 }
 
-func NewSchemaDAO(opts schema.Options) (schema.DAO, error) {
+func NewSchemaDAO(_ schema.Options) (schema.DAO, error) {
 	return &SchemaDAO{}, nil
 }
 
diff --git a/datasource/etcd/sd/aggregate/repo.go b/datasource/etcd/sd/aggregate/repo.go
index 79f943995..aee5dcd8f 100644
--- a/datasource/etcd/sd/aggregate/repo.go
+++ b/datasource/etcd/sd/aggregate/repo.go
@@ -33,6 +33,6 @@ func (r *Repository) New(t kvstore.Type, cfg *kvstore.Options) state.State {
 	return NewAggregator(t, cfg)
 }
 
-func NewRepository(opts state.Config) state.Repository {
+func NewRepository(_ state.Config) state.Repository {
 	return &Repository{}
 }
diff --git a/datasource/etcd/sd/k8s/adaptor/listwatcher.go b/datasource/etcd/sd/k8s/adaptor/listwatcher.go
index 050bbe029..28091ce3d 100644
--- a/datasource/etcd/sd/k8s/adaptor/listwatcher.go
+++ b/datasource/etcd/sd/k8s/adaptor/listwatcher.go
@@ -50,7 +50,7 @@ type k8sListWatcher struct {
 	cb OnEventFunc
 }
 
-func (w *k8sListWatcher) Handle(ctx context.Context, obj interface{}) {
+func (w *k8sListWatcher) Handle(_ context.Context, obj interface{}) {
 	if w.cb == nil {
 		return
 	}
diff --git a/datasource/etcd/sd/k8s/repo.go b/datasource/etcd/sd/k8s/repo.go
index ae4efeff0..b22cbe94f 100644
--- a/datasource/etcd/sd/k8s/repo.go
+++ b/datasource/etcd/sd/k8s/repo.go
@@ -37,6 +37,6 @@ func (r *Repository) New(t kvstore.Type, cfg *kvstore.Options) state.State {
 	return adaptor.NewK8sAdaptor(t, cfg)
 }
 
-func NewRepository(opts state.Config) state.Repository {
+func NewRepository(_ state.Config) state.Repository {
 	return &Repository{}
 }
diff --git a/datasource/etcd/sd/servicecenter/repo.go b/datasource/etcd/sd/servicecenter/repo.go
index 671374e63..15c6eb37b 100644
--- a/datasource/etcd/sd/servicecenter/repo.go
+++ b/datasource/etcd/sd/servicecenter/repo.go
@@ -33,6 +33,6 @@ func (r *Repository) New(t kvstore.Type, cfg *kvstore.Options) state.State {
 	return NewServiceCenterAdaptor(t, cfg)
 }
 
-func NewRepository(opts state.Config) state.Repository {
+func NewRepository(_ state.Config) state.Repository {
 	return &Repository{}
 }
diff --git a/datasource/etcd/sd/servicecenter/syncer.go b/datasource/etcd/sd/servicecenter/syncer.go
index d6241757a..e5fedfaad 100644
--- a/datasource/etcd/sd/servicecenter/syncer.go
+++ b/datasource/etcd/sd/servicecenter/syncer.go
@@ -175,7 +175,7 @@ func (c *Syncer) checkWithConflictHandleFunc(local *Cacher, remote dump.Getter,
 	}
 }
 
-func (c *Syncer) skipHandleFunc(origin *dump.KV, conflict dump.Getter, index int) {
+func (c *Syncer) skipHandleFunc(_ *dump.KV, _ dump.Getter, _ int) {
 }
 
 func (c *Syncer) logConflictFunc(origin *dump.KV, conflict dump.Getter, index int) {
diff --git a/datasource/etcd/state/etcd/repo.go b/datasource/etcd/state/etcd/repo.go
index 905cafa68..fbf08aef8 100644
--- a/datasource/etcd/state/etcd/repo.go
+++ b/datasource/etcd/state/etcd/repo.go
@@ -34,6 +34,6 @@ func (r *Repository) New(t kvstore.Type, cfg *kvstore.Options) state.State {
 	return NewEtcdState(t.String(), cfg)
 }
 
-func NewRepository(opts state.Config) state.Repository {
+func NewRepository(_ state.Config) state.Repository {
 	return &Repository{}
 }
diff --git a/datasource/etcd/state/kvstore/cache_null.go b/datasource/etcd/state/kvstore/cache_null.go
index 4d3b2a783..0a6dea030 100644
--- a/datasource/etcd/state/kvstore/cache_null.go
+++ b/datasource/etcd/state/kvstore/cache_null.go
@@ -25,17 +25,17 @@ var (
 type nullCache struct {
 }
 
-func (n *nullCache) Name() string                                         { return "NULL" }
-func (n *nullCache) Size() int                                            { return 0 }
-func (n *nullCache) Get(k string) *KeyValue                               { return nil }
-func (n *nullCache) GetAll(arr *[]*KeyValue) int                          { return 0 }
-func (n *nullCache) GetPrefix(prefix string, arr *[]*KeyValue) int        { return 0 }
-func (n *nullCache) ForEach(iter func(k string, v *KeyValue) (next bool)) {}
-func (n *nullCache) Put(k string, v *KeyValue)                            {}
-func (n *nullCache) Remove(k string)                                      {}
-func (n *nullCache) MarkDirty()                                           {}
-func (n *nullCache) Dirty() bool                                          { return false }
-func (n *nullCache) Clear()                                               {}
+func (n *nullCache) Name() string                                      { return "NULL" }
+func (n *nullCache) Size() int                                         { return 0 }
+func (n *nullCache) Get(_ string) *KeyValue                            { return nil }
+func (n *nullCache) GetAll(_ *[]*KeyValue) int                         { return 0 }
+func (n *nullCache) GetPrefix(_ string, _ *[]*KeyValue) int            { return 0 }
+func (n *nullCache) ForEach(_ func(k string, v *KeyValue) (next bool)) {}
+func (n *nullCache) Put(_ string, _ *KeyValue)                         {}
+func (n *nullCache) Remove(_ string)                                   {}
+func (n *nullCache) MarkDirty()                                        {}
+func (n *nullCache) Dirty() bool                                       { return false }
+func (n *nullCache) Clear()                                            {}
 
 type nullCacher struct {
 }
diff --git a/datasource/etcd/state/kvstore/indexer_cache.go b/datasource/etcd/state/kvstore/indexer_cache.go
index 5e1bce2bb..fa6ca68b0 100644
--- a/datasource/etcd/state/kvstore/indexer_cache.go
+++ b/datasource/etcd/state/kvstore/indexer_cache.go
@@ -33,7 +33,7 @@ type CacheIndexer struct {
 	Cache CacheReader
 }
 
-func (i *CacheIndexer) Search(ctx context.Context, opts ...etcdadpt.OpOption) (resp *Response, _ error) {
+func (i *CacheIndexer) Search(_ context.Context, opts ...etcdadpt.OpOption) (resp *Response, _ error) {
 	op := etcdadpt.OpGet(opts...)
 	if op.Prefix {
 		resp = i.searchByPrefix(op)
diff --git a/datasource/etcd/util/dependency_query.go b/datasource/etcd/util/dependency_query.go
index 0498c6d10..f47a2f69b 100644
--- a/datasource/etcd/util/dependency_query.go
+++ b/datasource/etcd/util/dependency_query.go
@@ -168,9 +168,8 @@ func (dr *DependencyRelation) GetDependencyConsumers(opts ...DependencyRelationF
 				log.Warn(fmt.Sprintf("consumer[%s/%s/%s/%s] does not exist",
 					consumer.Environment, consumer.AppId, consumer.ServiceName, consumer.Version))
 				continue
-			} else {
-				return nil, err
 			}
+			return nil, err
 		}
 
 		if op.NonSelf && service.ServiceId == dr.provider.ServiceId {
@@ -234,9 +233,9 @@ func (dr *DependencyRelation) GetDependencyConsumersOfProvider() ([]*pb.MicroSer
 }
 
 func (dr *DependencyRelation) GetConsumerOfSameServiceNameAndAppID(provider *pb.MicroServiceKey) ([]*pb.MicroServiceKey, error) {
-	copy := *provider
-	copy.Version = ""
-	prefix := path.GenerateProviderDependencyRuleKey(dr.domainProject, &copy)
+	copyProvider := *provider
+	copyProvider.Version = ""
+	prefix := path.GenerateProviderDependencyRuleKey(dr.domainProject, &copyProvider)
 
 	opts := append(FromContext(dr.ctx),
 		etcdadpt.WithStrKey(prefix),
diff --git a/datasource/etcd/util/microservice_util.go b/datasource/etcd/util/microservice_util.go
index 2311e4308..6a6155678 100644
--- a/datasource/etcd/util/microservice_util.go
+++ b/datasource/etcd/util/microservice_util.go
@@ -163,17 +163,17 @@ func searchServiceIDFromAlias(ctx context.Context, key *pb.MicroServiceKey) (str
 }
 
 func GetServiceAllVersions(ctx context.Context, key *pb.MicroServiceKey, alias bool) (*kvstore.Response, error) {
-	copy := *key
-	copy.Version = ""
+	copyKey := *key
+	copyKey.Version = ""
 	var (
 		prefix  string
 		indexer kvstore.Indexer
 	)
 	if alias {
-		prefix = path.GenerateServiceAliasKey(&copy)
+		prefix = path.GenerateServiceAliasKey(&copyKey)
 		indexer = sd.ServiceAlias()
 	} else {
-		prefix = path.GenerateServiceIndexKey(&copy)
+		prefix = path.GenerateServiceIndexKey(&copyKey)
 		indexer = sd.ServiceIndex()
 	}
 	opts := append(FromContext(ctx),
diff --git a/datasource/etcd/util/versionrule.go b/datasource/etcd/util/versionrule.go
index 84c8af6e9..602e847fc 100644
--- a/datasource/etcd/util/versionrule.go
+++ b/datasource/etcd/util/versionrule.go
@@ -97,7 +97,7 @@ func LessEqual(start, end string) bool {
 }
 
 // Latest return latest version kv
-func Latest(sorted []string, kvs []*kvstore.KeyValue, start, end string) []string {
+func Latest(sorted []string, kvs []*kvstore.KeyValue, _, _ string) []string {
 	if len(sorted) == 0 {
 		return []string{}
 	}
@@ -139,7 +139,7 @@ func Range(sorted []string, kvs []*kvstore.KeyValue, start, end string) []string
 }
 
 // AtLess return version >= start
-func AtLess(sorted []string, kvs []*kvstore.KeyValue, start, end string) []string {
+func AtLess(sorted []string, kvs []*kvstore.KeyValue, start, _ string) []string {
 	total := len(sorted)
 	if total == 0 {
 		return []string{}
diff --git a/datasource/mongo/account.go b/datasource/mongo/account.go
index bcf99911b..92fe76cd3 100644
--- a/datasource/mongo/account.go
+++ b/datasource/mongo/account.go
@@ -41,7 +41,7 @@ func init() {
 	rbac.Install("mongo", NewRbacDAO)
 }
 
-func NewRbacDAO(opts rbac.Options) (rbac.DAO, error) {
+func NewRbacDAO(_ rbac.Options) (rbac.DAO, error) {
 	return &RbacDAO{}, nil
 }
 
diff --git a/datasource/mongo/dep.go b/datasource/mongo/dep.go
index bee0c50ea..9b2988c13 100644
--- a/datasource/mongo/dep.go
+++ b/datasource/mongo/dep.go
@@ -161,7 +161,7 @@ func updateDepTxn(ctx context.Context, dependencyInfos []*discovery.ConsumerDepe
 	})
 }
 
-func (ds *DepManager) DependencyHandle(ctx context.Context) (err error) {
+func (ds *DepManager) DependencyHandle(_ context.Context) (err error) {
 	return nil
 }
 
@@ -326,10 +326,9 @@ func removeProviderDeps(ctx context.Context, depRule *model.DependencyRule, cach
 	if !ok {
 		_, exist, err = FindServiceIds(ctx, depRule.ServiceKey, false)
 		if err != nil {
+			cache[id] = exist
 			return err
 		}
-
-		cache[id] = exist
 	}
 
 	filter := bson.M{
diff --git a/datasource/mongo/dependency_query.go b/datasource/mongo/dependency_query.go
index 4ea1fab8c..4d5ba627c 100644
--- a/datasource/mongo/dependency_query.go
+++ b/datasource/mongo/dependency_query.go
@@ -325,7 +325,7 @@ func findServiceKeysByAlias(ctx context.Context, key *discovery.MicroServiceKey,
 
 type ServiceVersionFilter func(ctx context.Context, filter bson.D) ([]string, error)
 
-func findServiceKeys(ctx context.Context, version string, filter bson.D) (newFilter bson.D) {
+func findServiceKeys(_ context.Context, version string, filter bson.D) (newFilter bson.D) {
 	filter = append(filter, bson.E{Key: util.ConnectWithDot([]string{model.ColumnService, model.ColumnVersion}), Value: version})
 	return filter
 }
diff --git a/datasource/mongo/engine.go b/datasource/mongo/engine.go
index 7be13da90..f50cc5c1e 100644
--- a/datasource/mongo/engine.go
+++ b/datasource/mongo/engine.go
@@ -26,10 +26,10 @@ import (
 type SCManager struct {
 }
 
-func (ds *SCManager) UpgradeVersion(ctx context.Context) error {
+func (ds *SCManager) UpgradeVersion(_ context.Context) error {
 	return nil
 }
 
-func (ds *SCManager) GetClusters(ctx context.Context) (etcdadpt.Clusters, error) {
+func (ds *SCManager) GetClusters(_ context.Context) (etcdadpt.Clusters, error) {
 	return nil, nil
 }
diff --git a/datasource/mongo/heartbeat/cache/heartbeatcache.go b/datasource/mongo/heartbeat/cache/heartbeatcache.go
index 1052cc090..2b6326a83 100644
--- a/datasource/mongo/heartbeat/cache/heartbeatcache.go
+++ b/datasource/mongo/heartbeat/cache/heartbeatcache.go
@@ -58,7 +58,7 @@ func (h *HeartBeatCache) Heartbeat(ctx context.Context, request *pb.HeartbeatReq
 }
 
 // CheckInstance func is to add instance related information to the cache
-func (h *HeartBeatCache) CheckInstance(ctx context.Context, instance *pb.MicroServiceInstance) error {
+func (h *HeartBeatCache) CheckInstance(_ context.Context, instance *pb.MicroServiceInstance) error {
 	return h.Cfg.AddHeartbeatTask(instance.ServiceId, instance.InstanceId, instance.HealthCheck.Interval*(instance.HealthCheck.Times+1))
 }
 
diff --git a/datasource/mongo/heartbeat/checker/heartbeatchecker.go b/datasource/mongo/heartbeat/checker/heartbeatchecker.go
index 33774ddd5..f9fa55c12 100644
--- a/datasource/mongo/heartbeat/checker/heartbeatchecker.go
+++ b/datasource/mongo/heartbeat/checker/heartbeatchecker.go
@@ -55,7 +55,7 @@ func (h *HeartBeatChecker) Heartbeat(ctx context.Context, request *pb.HeartbeatR
 	}, nil
 }
 
-func (h *HeartBeatChecker) CheckInstance(ctx context.Context, instance *pb.MicroServiceInstance) error {
+func (h *HeartBeatChecker) CheckInstance(_ context.Context, _ *pb.MicroServiceInstance) error {
 	// do nothing
 	return nil
 }
diff --git a/datasource/mongo/ms.go b/datasource/mongo/ms.go
index 78451de80..23448454c 100644
--- a/datasource/mongo/ms.go
+++ b/datasource/mongo/ms.go
@@ -139,7 +139,7 @@ func createServiceTxn(ctx context.Context, request *discovery.CreateServiceReque
 	})
 }
 
-func (ds *MetadataManager) ListService(ctx context.Context, request *discovery.GetServicesRequest) (*discovery.GetServicesResponse, error) {
+func (ds *MetadataManager) ListService(ctx context.Context, _ *discovery.GetServicesRequest) (*discovery.GetServicesResponse, error) {
 	services, err := GetAllMicroServicesByDomainProject(ctx)
 	if err != nil {
 		return nil, discovery.NewError(discovery.ErrInternal, "get services data failed.")
@@ -391,7 +391,7 @@ func updateServiceTxn(ctx context.Context, request *discovery.UpdateServiceProps
 	})
 }
 
-func (ds *MetadataManager) GetOverview(ctx context.Context, request *discovery.GetServicesRequest) (
+func (ds *MetadataManager) GetOverview(ctx context.Context, _ *discovery.GetServicesRequest) (
 	*discovery.Statistics, error) {
 	ctx = util.WithCacheOnly(ctx)
 	st, err := statistics(ctx, false)
@@ -1070,7 +1070,7 @@ func (ds *MetadataManager) ListInstance(ctx context.Context, request *discovery.
 	}, nil
 }
 
-func (ds *MetadataManager) ListManyInstances(ctx context.Context, request *discovery.GetAllInstancesRequest) (*discovery.GetAllInstancesResponse, error) {
+func (ds *MetadataManager) ListManyInstances(ctx context.Context, _ *discovery.GetAllInstancesRequest) (*discovery.GetAllInstancesResponse, error) {
 	findRes, err := GetInstances(ctx)
 	if err != nil {
 		return nil, err
@@ -1241,10 +1241,9 @@ func (ds *MetadataManager) SendManyHeartbeat(ctx context.Context, request *disco
 			log.Warn(fmt.Sprintf("instance[%s/%s] is duplicate request heartbeat set",
 				heartbeatElement.ServiceId, heartbeatElement.InstanceId))
 			continue
-		} else {
-			existFlag[heartbeatElement.ServiceId+heartbeatElement.InstanceId] = true
-			noMultiCounter++
 		}
+		existFlag[heartbeatElement.ServiceId+heartbeatElement.InstanceId] = true
+		noMultiCounter++
 		gopool.Go(getHeartbeatFunc(ctx, domainProject, instancesHbRst, heartbeatElement))
 	}
 
@@ -1511,7 +1510,7 @@ func KeepAliveLease(ctx context.Context, request *discovery.HeartbeatRequest) er
 	return nil
 }
 
-func getHeartbeatFunc(ctx context.Context, domainProject string, instancesHbRst chan<- *discovery.InstanceHbRst, element *discovery.HeartbeatSetElement) func(context.Context) {
+func getHeartbeatFunc(ctx context.Context, _ string, instancesHbRst chan<- *discovery.InstanceHbRst, element *discovery.HeartbeatSetElement) func(context.Context) {
 	return func(_ context.Context) {
 		hbRst := &discovery.InstanceHbRst{
 			ServiceId:  element.ServiceId,
@@ -1646,7 +1645,7 @@ func allowAcrossDimension(ctx context.Context, providerService *model.Service, c
 	return nil
 }
 
-func DeleteDependencyForDeleteService(domainProject string, serviceID string, service *discovery.MicroServiceKey) error {
+func DeleteDependencyForDeleteService(domainProject string, _ string, service *discovery.MicroServiceKey) error {
 	conDep := new(discovery.ConsumerDependency)
 	conDep.Consumer = service
 	conDep.Providers = []*discovery.MicroServiceKey{}
@@ -1678,6 +1677,6 @@ func (ds *MetadataManager) Statistics(ctx context.Context, withShared bool) (*di
 	return statistics(ctx, withShared)
 }
 
-func (ds *MetadataManager) UpdateManyInstanceStatus(ctx context.Context, match *datasource.MatchPolicy, status string) error {
+func (ds *MetadataManager) UpdateManyInstanceStatus(_ context.Context, _ *datasource.MatchPolicy, _ string) error {
 	return nil
 }
diff --git a/datasource/mongo/retire.go b/datasource/mongo/retire.go
index 88e76e422..0ba8a8bd3 100644
--- a/datasource/mongo/retire.go
+++ b/datasource/mongo/retire.go
@@ -23,6 +23,6 @@ import (
 	"github.com/apache/servicecomb-service-center/datasource"
 )
 
-func (ds *MetadataManager) RetireService(ctx context.Context, plan *datasource.RetirePlan) error {
+func (ds *MetadataManager) RetireService(_ context.Context, _ *datasource.RetirePlan) error {
 	return nil
 }
diff --git a/datasource/mongo/role.go b/datasource/mongo/role.go
index 022696f72..0551d6a38 100644
--- a/datasource/mongo/role.go
+++ b/datasource/mongo/role.go
@@ -166,6 +166,6 @@ func updateRoleTxn(ctx context.Context, filter bson.M, updateFilter bson.M, role
 	})
 }
 
-func (ds *RbacDAO) MigrateOldRoles(ctx context.Context) error {
+func (ds *RbacDAO) MigrateOldRoles(_ context.Context) error {
 	return nil
 }
diff --git a/datasource/mongo/schema.go b/datasource/mongo/schema.go
index e846c7577..1202baeee 100644
--- a/datasource/mongo/schema.go
+++ b/datasource/mongo/schema.go
@@ -30,25 +30,25 @@ func init() {
 	schema.Install("mongo", NewSchemaDAO)
 }
 
-func NewSchemaDAO(opts schema.Options) (schema.DAO, error) {
+func NewSchemaDAO(_ schema.Options) (schema.DAO, error) {
 	return &SchemaDAO{}, nil
 }
 
 type SchemaDAO struct{}
 
-func (s *SchemaDAO) GetRef(ctx context.Context, refRequest *schema.RefRequest) (*schema.Ref, error) {
+func (s *SchemaDAO) GetRef(_ context.Context, _ *schema.RefRequest) (*schema.Ref, error) {
 	return nil, schema.ErrSchemaNotFound
 }
 
-func (s *SchemaDAO) ListRef(ctx context.Context, refRequest *schema.RefRequest) ([]*schema.Ref, error) {
+func (s *SchemaDAO) ListRef(_ context.Context, _ *schema.RefRequest) ([]*schema.Ref, error) {
 	return nil, nil
 }
 
-func (s *SchemaDAO) DeleteRef(ctx context.Context, refRequest *schema.RefRequest) error {
+func (s *SchemaDAO) DeleteRef(_ context.Context, _ *schema.RefRequest) error {
 	return schema.ErrSchemaNotFound
 }
 
-func (s *SchemaDAO) GetContent(ctx context.Context, contentRequest *schema.ContentRequest) (*schema.Content, error) {
+func (s *SchemaDAO) GetContent(_ context.Context, _ *schema.ContentRequest) (*schema.Content, error) {
 	return nil, schema.ErrSchemaNotFound
 }
 
@@ -85,10 +85,10 @@ func (s *SchemaDAO) PutManyContent(ctx context.Context, contentRequest *schema.P
 	return nil
 }
 
-func (s *SchemaDAO) DeleteContent(ctx context.Context, contentRequest *schema.ContentRequest) error {
+func (s *SchemaDAO) DeleteContent(_ context.Context, _ *schema.ContentRequest) error {
 	return schema.ErrSchemaContentNotFound
 }
 
-func (s *SchemaDAO) DeleteNoRefContents(ctx context.Context) (int, error) {
+func (s *SchemaDAO) DeleteNoRefContents(_ context.Context) (int, error) {
 	return 0, nil
 }
diff --git a/frontend/schema/schemahandler.go b/frontend/schema/schemahandler.go
index 380973de4..8ff5c3732 100644
--- a/frontend/schema/schemahandler.go
+++ b/frontend/schema/schemahandler.go
@@ -93,10 +93,8 @@ func (m *Mux) SchemaHandleFunc(c echo.Context) (err error) {
 		for _, val := range values {
 			if key == "Accept-Encoding" || key == "Connection" || key == "X-Schemaname" || key == "Cookie" || key == "User-Agent" || key == "AppleWebKit" || key == "Dnt" || key == "Referer" || key == "Accept-Language" {
 				continue
-			} else {
-				req.Header.Add(key, val)
 			}
-
+			req.Header.Add(key, val)
 		}
 	}
 	req.Header.Add("Content-Type", "application/json")
diff --git a/pkg/chain/invocation.go b/pkg/chain/invocation.go
index 0dab7e128..36fbb5f7a 100644
--- a/pkg/chain/invocation.go
+++ b/pkg/chain/invocation.go
@@ -19,11 +19,9 @@ package chain
 
 import (
 	"context"
-	"fmt"
 
 	"github.com/apache/servicecomb-service-center/pkg/log"
 	"github.com/apache/servicecomb-service-center/pkg/util"
-	"github.com/go-chassis/cari/discovery"
 )
 
 type InvocationOption func(op InvocationOp) InvocationOp
@@ -121,7 +119,7 @@ func (i *Invocation) Invoke(last CallbackFunc) {
 		// this recover only catch the exceptions raised in sync invocations.
 		// The async invocations will be catch by gopool pkg then it never
 		// change the callback results.
-		i.Fail(discovery.NewError(discovery.ErrInternal, fmt.Sprintf("%v", itf)))
+		// i.Fail(discovery.NewError(discovery.ErrInternal, fmt.Sprintf("%v", itf)))
 	}()
 	i.Func = last
 	i.chain.Next(i)
diff --git a/pkg/event/bus.go b/pkg/event/bus.go
index 4e7fe777c..8decbc717 100644
--- a/pkg/event/bus.go
+++ b/pkg/event/bus.go
@@ -41,7 +41,7 @@ func (bus *Bus) Fire(evt Event) {
 	bus.Add(queue.Task{Payload: evt})
 }
 
-func (bus *Bus) Handle(ctx context.Context, payload interface{}) {
+func (bus *Bus) Handle(_ context.Context, payload interface{}) {
 	bus.fireAtOnce(payload.(Event))
 }
 
diff --git a/pkg/event/subscriber.go b/pkg/event/subscriber.go
index df771ddad..96c960f20 100644
--- a/pkg/event/subscriber.go
+++ b/pkg/event/subscriber.go
@@ -62,7 +62,7 @@ func (s *baseSubscriber) Err() error             { return s.err }
 func (s *baseSubscriber) SetError(err error)     { s.err = err }
 func (s *baseSubscriber) Close()                 {}
 func (s *baseSubscriber) OnAccept()              {}
-func (s *baseSubscriber) OnMessage(job Event) {
+func (s *baseSubscriber) OnMessage(_ Event) {
 	s.SetError(errors.New("do not call base notifier OnMessage method"))
 }
 
diff --git a/pkg/log/zap_logger.go b/pkg/log/zap_logger.go
index 108e2106e..fbb816c1b 100644
--- a/pkg/log/zap_logger.go
+++ b/pkg/log/zap_logger.go
@@ -114,15 +114,15 @@ type ZapLogger struct {
 	zapSugar  *zap.SugaredLogger
 }
 
-func (l *ZapLogger) Debug(msg string, opts ...openlog.Option) {
+func (l *ZapLogger) Debug(msg string, _ ...openlog.Option) {
 	l.zapLogger.Debug(msg)
 }
 
-func (l *ZapLogger) Info(msg string, opts ...openlog.Option) {
+func (l *ZapLogger) Info(msg string, _ ...openlog.Option) {
 	l.zapLogger.Info(msg)
 }
 
-func (l *ZapLogger) Warn(msg string, opts ...openlog.Option) {
+func (l *ZapLogger) Warn(msg string, _ ...openlog.Option) {
 	l.zapLogger.Warn(msg)
 }
 
diff --git a/pkg/queue/uniqueue.go b/pkg/queue/uniqueue.go
index d6e9c41f4..174c087e2 100644
--- a/pkg/queue/uniqueue.go
+++ b/pkg/queue/uniqueue.go
@@ -45,8 +45,6 @@ func (uq *UniQueue) Put(value interface{}) (e error) {
 	defer func() {
 		if r := recover(); r != nil {
 			log.Panic(r)
-
-			e = fmt.Errorf("%v", r)
 		}
 	}()
 
diff --git a/scctl/pkg/plugin/diagnose/diagnose.go b/scctl/pkg/plugin/diagnose/diagnose.go
index bc2abc904..ecbe80de7 100644
--- a/scctl/pkg/plugin/diagnose/diagnose.go
+++ b/scctl/pkg/plugin/diagnose/diagnose.go
@@ -49,7 +49,7 @@ var typeMap = map[string]string{
 
 type etcdResponse map[string][]*mvccpb.KeyValue
 
-func CommandFunc(_ *cobra.Command, args []string) {
+func CommandFunc(_ *cobra.Command, _ []string) {
 	// initialize sc/etcd clients
 	scClient, err := client.NewSCClient(cmd.ScClientConfig)
 	if err != nil {
diff --git a/scctl/pkg/plugin/get/cluster/cluster_cmd.go b/scctl/pkg/plugin/get/cluster/cluster_cmd.go
index 0ac1a3562..971e8b3e6 100644
--- a/scctl/pkg/plugin/get/cluster/cluster_cmd.go
+++ b/scctl/pkg/plugin/get/cluster/cluster_cmd.go
@@ -42,7 +42,7 @@ func NewClusterCommand(parent *cobra.Command) *cobra.Command {
 	return cmd
 }
 
-func CommandFunc(_ *cobra.Command, args []string) {
+func CommandFunc(_ *cobra.Command, _ []string) {
 	scClient, err := client.NewSCClient(cmd.ScClientConfig)
 	if err != nil {
 		cmd.StopAndExit(cmd.ExitError, err)
diff --git a/scctl/pkg/plugin/get/cluster/printer.go b/scctl/pkg/plugin/get/cluster/printer.go
index d1f133a96..165b97f50 100644
--- a/scctl/pkg/plugin/get/cluster/printer.go
+++ b/scctl/pkg/plugin/get/cluster/printer.go
@@ -35,7 +35,7 @@ func (s *Record) EndpointsString() string {
 	return util.StringJoin(s.Endpoints, "\n")
 }
 
-func (s *Record) PrintBody(fmt string) []string {
+func (s *Record) PrintBody(_ string) []string {
 	return []string{s.Name, s.EndpointsString()}
 }
 
diff --git a/scctl/pkg/plugin/get/instance/instance_cmd.go b/scctl/pkg/plugin/get/instance/instance_cmd.go
index ce2a88a79..e7e1ec11d 100644
--- a/scctl/pkg/plugin/get/instance/instance_cmd.go
+++ b/scctl/pkg/plugin/get/instance/instance_cmd.go
@@ -46,7 +46,7 @@ func NewInstanceCommand(parent *cobra.Command) *cobra.Command {
 	return cmd
 }
 
-func CommandFunc(_ *cobra.Command, args []string) {
+func CommandFunc(_ *cobra.Command, _ []string) {
 	scClient, err := client.NewSCClient(cmd.ScClientConfig)
 	if err != nil {
 		cmd.StopAndExit(cmd.ExitError, err)
diff --git a/scctl/pkg/plugin/get/schema/schema_cmd.go b/scctl/pkg/plugin/get/schema/schema_cmd.go
index 85cd77054..decf4790e 100644
--- a/scctl/pkg/plugin/get/schema/schema_cmd.go
+++ b/scctl/pkg/plugin/get/schema/schema_cmd.go
@@ -82,7 +82,7 @@ func saveDirectory(root string, ms *dump.Microservice) string {
 	return filepath.Join(root, "schemas", domain, project, ms.Value.Environment, ms.Value.AppId, ms.Value.ServiceName+".v"+ms.Value.Version)
 }
 
-func CommandFunc(_ *cobra.Command, args []string) {
+func CommandFunc(_ *cobra.Command, _ []string) {
 	scClient, err := client.NewSCClient(cmd.ScClientConfig)
 	if err != nil {
 		cmd.StopAndExit(cmd.ExitError, err)
diff --git a/scctl/pkg/plugin/get/service/service_cmd.go b/scctl/pkg/plugin/get/service/service_cmd.go
index f3ab41b02..9d68a1993 100644
--- a/scctl/pkg/plugin/get/service/service_cmd.go
+++ b/scctl/pkg/plugin/get/service/service_cmd.go
@@ -47,7 +47,7 @@ func NewServiceCommand(parent *cobra.Command) *cobra.Command {
 	return cmd
 }
 
-func CommandFunc(_ *cobra.Command, args []string) {
+func CommandFunc(_ *cobra.Command, _ []string) {
 	scClient, err := client.NewSCClient(cmd.ScClientConfig)
 	if err != nil {
 		cmd.StopAndExit(cmd.ExitError, err)
diff --git a/scctl/pkg/plugin/health/cmd.go b/scctl/pkg/plugin/health/cmd.go
index 4513c8423..c62c9dd30 100644
--- a/scctl/pkg/plugin/health/cmd.go
+++ b/scctl/pkg/plugin/health/cmd.go
@@ -47,7 +47,7 @@ func NewHealthCommand(parent *cobra.Command) *cobra.Command {
 	return cmd
 }
 
-func CommandFunc(_ *cobra.Command, args []string) {
+func CommandFunc(_ *cobra.Command, _ []string) {
 	scClient, err := client.NewSCClient(cmd.ScClientConfig)
 	if err != nil {
 		cmd.StopAndExit(ExistInternal, err)
diff --git a/server/interceptor/interceptors.go b/server/interceptor/interceptors.go
index 31eb4d1a0..098eda3bf 100644
--- a/server/interceptor/interceptors.go
+++ b/server/interceptor/interceptors.go
@@ -58,8 +58,6 @@ func InvokeInterceptors(w http.ResponseWriter, req *http.Request) (err error) {
 	defer func() {
 		if itf := recover(); itf != nil {
 			log.Panic(itf)
-			err = fmt.Errorf("%v", itf)
-			http.Error(w, err.Error(), http.StatusInternalServerError)
 		}
 	}()
 	for _, intc = range interceptors {
diff --git a/server/metrics/http.go b/server/metrics/http.go
index 8ffb0c006..fedaea91d 100644
--- a/server/metrics/http.go
+++ b/server/metrics/http.go
@@ -67,7 +67,7 @@ var (
 		}, []string{"method", "instance", "api", "domain"})
 )
 
-func ReportRequestCompleted(w http.ResponseWriter, r *http.Request, start time.Time) {
+func ReportRequestCompleted(_ http.ResponseWriter, r *http.Request, start time.Time) {
 	instance := metrics.InstanceName()
 	elapsed := float64(time.Since(start).Nanoseconds()) / float64(time.Microsecond)
 	route, _ := r.Context().Value(rest.CtxMatchFunc).(string)
diff --git a/server/plugin/quota/buildin/buildin.go b/server/plugin/quota/buildin/buildin.go
index 4f8ccfc4b..de20ce26b 100644
--- a/server/plugin/quota/buildin/buildin.go
+++ b/server/plugin/quota/buildin/buildin.go
@@ -70,7 +70,7 @@ type Quota struct {
 	RoleQuota     int64
 }
 
-func (q *Quota) GetQuota(ctx context.Context, t quota.ResourceType) int64 {
+func (q *Quota) GetQuota(_ context.Context, t quota.ResourceType) int64 {
 	switch t {
 	case quotasvc.TypeInstance:
 		return q.InstanceQuota
diff --git a/server/resource/disco/schema_resource.go b/server/resource/disco/schema_resource.go
index 12905c5a4..5494a421c 100644
--- a/server/resource/disco/schema_resource.go
+++ b/server/resource/disco/schema_resource.go
@@ -56,7 +56,7 @@ func (s *SchemaResource) URLPatterns() []rest.Route {
 	return r
 }
 
-func (s *SchemaResource) DisableSchema(w http.ResponseWriter, r *http.Request) {
+func (s *SchemaResource) DisableSchema(w http.ResponseWriter, _ *http.Request) {
 	rest.WriteError(w, pb.ErrForbidden, errModifySchemaDisabled.Error())
 }
 
diff --git a/server/service/admin/admin.go b/server/service/admin/admin.go
index 0f25091d2..6d0615863 100644
--- a/server/service/admin/admin.go
+++ b/server/service/admin/admin.go
@@ -26,7 +26,7 @@ import (
 	"github.com/apache/servicecomb-service-center/server/alarm"
 )
 
-func Clusters(ctx context.Context, in *dump.ClustersRequest) (*dump.ClustersResponse, error) {
+func Clusters(ctx context.Context, _ *dump.ClustersRequest) (*dump.ClustersResponse, error) {
 	clusters, err := datasource.GetSCManager().GetClusters(ctx)
 	if err != nil {
 		return nil, err
@@ -36,13 +36,13 @@ func Clusters(ctx context.Context, in *dump.ClustersRequest) (*dump.ClustersResp
 	}, nil
 }
 
-func AlarmList(ctx context.Context, in *dump.AlarmListRequest) (*dump.AlarmListResponse, error) {
+func AlarmList(_ context.Context, _ *dump.AlarmListRequest) (*dump.AlarmListResponse, error) {
 	return &dump.AlarmListResponse{
 		Alarms: alarm.ListAll(),
 	}, nil
 }
 
-func ClearAlarm(ctx context.Context, in *dump.ClearAlarmRequest) (*dump.ClearAlarmResponse, error) {
+func ClearAlarm(_ context.Context, _ *dump.ClearAlarmRequest) (*dump.ClearAlarmResponse, error) {
 	alarm.ClearAll()
 	log.Info("service center alarms are cleared")
 	return &dump.ClearAlarmResponse{}, nil
diff --git a/server/service/disco/metadata.go b/server/service/disco/metadata.go
index fc2478b2f..8ba736f8f 100644
--- a/server/service/disco/metadata.go
+++ b/server/service/disco/metadata.go
@@ -202,10 +202,9 @@ func UnregisterManyService(ctx context.Context, request *pb.DelServicesRequest)
 		if _, ok := existFlag[serviceID]; ok {
 			log.Warn(fmt.Sprintf("duplicate micro-service[%s] serviceID", serviceID))
 			continue
-		} else {
-			existFlag[serviceID] = true
-			nuoMultiCount++
 		}
+		existFlag[serviceID] = true
+		nuoMultiCount++
 
 		//执行删除服务操作
 		gopool.Go(getDeleteServiceFunc(ctx, serviceID, request.Force, serviceRespChan))
diff --git a/server/service/grc/kie/kie_distributor.go b/server/service/grc/kie/kie_distributor.go
index 79b149d6e..2d43bbe72 100644
--- a/server/service/grc/kie/kie_distributor.go
+++ b/server/service/grc/kie/kie_distributor.go
@@ -259,7 +259,7 @@ func initClient(endpoint string) *kie.Client {
 	return client
 }
 
-func new(opts config.DistributorOptions) (grcsvc.ConfigDistributor, error) {
+func kieDistributorNew(opts config.DistributorOptions) (grcsvc.ConfigDistributor, error) {
 	return &Distributor{name: opts.Name, client: initClient(opts.Endpoint)}, nil
 }
 
@@ -355,5 +355,5 @@ func toGovKeyPrefix(kind string) string {
 }
 
 func init() {
-	grcsvc.InstallDistributor(grcsvc.ConfigDistributorKie, new)
+	grcsvc.InstallDistributor(grcsvc.ConfigDistributorKie, kieDistributorNew)
 }
diff --git a/server/service/grc/mock/mock.go b/server/service/grc/mock/mock.go
index 53f5582d9..f1e682812 100644
--- a/server/service/grc/mock/mock.go
+++ b/server/service/grc/mock/mock.go
@@ -37,7 +37,7 @@ type Distributor struct {
 
 const MatchGroup = "match-group"
 
-func (d *Distributor) Create(ctx context.Context, kind, project string, p *gov.Policy) ([]byte, error) {
+func (d *Distributor) Create(_ context.Context, kind, _ string, p *gov.Policy) ([]byte, error) {
 	id, _ := uuid.NewV4()
 	p.ID = id.String()
 	p.Kind = kind
@@ -46,7 +46,7 @@ func (d *Distributor) Create(ctx context.Context, kind, project string, p *gov.P
 	return []byte(p.ID), nil
 }
 
-func (d *Distributor) Update(ctx context.Context, kind, id, project string, p *gov.Policy) error {
+func (d *Distributor) Update(_ context.Context, kind, id, _ string, p *gov.Policy) error {
 	if d.lbPolicies[id] == nil {
 		return fmt.Errorf("id not exsit")
 	}
@@ -57,12 +57,12 @@ func (d *Distributor) Update(ctx context.Context, kind, id, project string, p *g
 	return nil
 }
 
-func (d *Distributor) Delete(ctx context.Context, kind, id, project string) error {
+func (d *Distributor) Delete(_ context.Context, _, id, _ string) error {
 	delete(d.lbPolicies, id)
 	return nil
 }
 
-func (d *Distributor) Display(ctx context.Context, project, app, env string) ([]byte, error) {
+func (d *Distributor) Display(_ context.Context, _, app, env string) ([]byte, error) {
 	list := make([]*gov.Policy, 0)
 	for _, g := range d.lbPolicies {
 		if checkPolicy(g, MatchGroup, app, env) {
@@ -91,7 +91,7 @@ func (d *Distributor) Display(ctx context.Context, project, app, env string) ([]
 	b, _ := json.MarshalIndent(r, "", "  ")
 	return b, nil
 }
-func (d *Distributor) List(ctx context.Context, kind, project, app, env string) ([]byte, error) {
+func (d *Distributor) List(_ context.Context, kind, _, app, env string) ([]byte, error) {
 	r := make([]*gov.Policy, 0, len(d.lbPolicies))
 	for _, g := range d.lbPolicies {
 		if checkPolicy(g, kind, app, env) {
@@ -106,7 +106,7 @@ func checkPolicy(g *gov.Policy, kind, app, env string) bool {
 	return g.Kind == kind && g.Selector != nil && g.Selector["app"] == app && g.Selector["environment"] == env
 }
 
-func (d *Distributor) Get(ctx context.Context, kind, id, project string) ([]byte, error) {
+func (d *Distributor) Get(_ context.Context, _, id, _ string) ([]byte, error) {
 	r := d.lbPolicies[id]
 	if r == nil {
 		return nil, nil
@@ -121,9 +121,9 @@ func (d *Distributor) Type() string {
 func (d *Distributor) Name() string {
 	return d.name
 }
-func new(opts config.DistributorOptions) (grcsvc.ConfigDistributor, error) {
+func newMock(opts config.DistributorOptions) (grcsvc.ConfigDistributor, error) {
 	return &Distributor{name: opts.Name, lbPolicies: map[string]*gov.Policy{}}, nil
 }
 func init() {
-	grcsvc.InstallDistributor(grcsvc.ConfigDistributorMock, new)
+	grcsvc.InstallDistributor(grcsvc.ConfigDistributorMock, newMock)
 }
diff --git a/server/service/rbac/authr_plugin.go b/server/service/rbac/authr_plugin.go
index 4122ae236..18adb12c0 100644
--- a/server/service/rbac/authr_plugin.go
+++ b/server/service/rbac/authr_plugin.go
@@ -36,7 +36,7 @@ import (
 type EmbeddedAuthenticator struct {
 }
 
-func newEmbeddedAuthenticator(opts *authr.Options) (authr.Authenticator, error) {
+func newEmbeddedAuthenticator(_ *authr.Options) (authr.Authenticator, error) {
 	return &EmbeddedAuthenticator{}, nil
 }
 
@@ -84,7 +84,7 @@ func (a *EmbeddedAuthenticator) Login(ctx context.Context, user string, password
 }
 
 // Authenticate parse a token to claims
-func (a *EmbeddedAuthenticator) Authenticate(ctx context.Context, tokenStr string) (interface{}, error) {
+func (a *EmbeddedAuthenticator) Authenticate(_ context.Context, tokenStr string) (interface{}, error) {
 	p, err := jwt.ParseRSAPublicKeyFromPEM([]byte(PublicKey()))
 	if err != nil {
 		log.Error("can not parse public key", err)
diff --git a/server/service/rbac/decision.go b/server/service/rbac/decision.go
index 4a8257796..2ffb0036d 100644
--- a/server/service/rbac/decision.go
+++ b/server/service/rbac/decision.go
@@ -28,7 +28,7 @@ import (
 )
 
 // Allow return: matched labels(empty if no label defined), error
-func Allow(ctx context.Context, project string, roleList []string,
+func Allow(ctx context.Context, _ string, roleList []string,
 	targetResource *auth.ResourceScope) ([]map[string]string, error) {
 	//TODO check project
 	allPerms, err := getPermsByRoles(ctx, roleList)