*: enable error check for some files

.golangci.yml

@@ -207,6 +207,6 @@ issues:
     - path: (pd-analysis|pd-api-bench|pd-backup|pd-ctl|pd-heartbeat-bench|pd-recover|pd-simulator|pd-tso-bench|pd-ut|regions-dump|stores-dump)
       linters:
         - errcheck
-    - path: (pkg/tso/admin.go|pkg/schedule/schedulers/split_bucket.go|server/api/plugin_disable.go|server/api/plugin_disable.go|server/api/operator.go|server/api/region.go|pkg/schedule/schedulers/balance_leader.go|plugin/scheduler_example/evict_leader.go|server/api/.*\.go|pkg/replication/replication_mode.go|pkg/storage/endpoint/gc_safe_point.go|server/.*\.go|pkg/schedule/schedulers/.*\.go|pkg/schedule/placement/rule.go|pkg/tso/allocator_manager.go|pkg/core/store_stats.go|pkg/core/store_stats.go|pkg/storage/hot_region_storage.go|pkg/syncer/server.go)
+    - path: (pkg/tso/admin.go|pkg/schedule/schedulers/split_bucket.go|server/api/plugin_disable.go|server/api/plugin_disable.go|server/api/operator.go|server/api/region.go|pkg/schedule/schedulers/balance_leader.go|server/api/.*\.go|pkg/replication/replication_mode.go|pkg/storage/endpoint/gc_safe_point.go|server/.*\.go|pkg/schedule/schedulers/.*\.go|pkg/syncer/server.go)
       linters:
         - errcheck

pkg/core/store_stats.go

@@ -18,6 +18,7 @@ import (
 	"github.com/pingcap/kvproto/pkg/pdpb"
 	"github.com/tikv/pd/pkg/movingaverage"
 	"github.com/tikv/pd/pkg/utils/syncutil"
+	"github.com/tikv/pd/pkg/utils/typeutil"
 )
 
 type storeStats struct {
@@ -56,10 +57,8 @@ func (ss *storeStats) GetStoreStats() *pdpb.StoreStats {
 // CloneStoreStats returns the statistics information cloned from the store.
 func (ss *storeStats) CloneStoreStats() *pdpb.StoreStats {
 	ss.mu.RLock()
-	b, _ := ss.rawStats.Marshal()
+	stats := typeutil.DeepClone(ss.rawStats, StoreStatsFactory)
 	ss.mu.RUnlock()
-	stats := &pdpb.StoreStats{}
-	stats.Unmarshal(b)
 	return stats
 }
 

pkg/schedule/placement/rule.go

@@ -90,7 +90,7 @@ func (r *Rule) String() string {
 // Clone returns a copy of Rule.
 func (r *Rule) Clone() *Rule {
 	var clone Rule
-	json.Unmarshal([]byte(r.String()), &clone)
+	_ = json.Unmarshal([]byte(r.String()), &clone)
 	clone.StartKey = append(r.StartKey[:0:0], r.StartKey...)
 	clone.EndKey = append(r.EndKey[:0:0], r.EndKey...)
 	return &clone

pkg/storage/hot_region_storage.go

@@ -171,7 +171,9 @@
 				 there may be residual hot regions, you can remove it manually, [pd-dir]/data/hot-region.`)
 				continue
 			}
-			h.delete(int(curReservedDays))
+			if err := h.delete(int(curReservedDays)); err != nil {
+				log.Error("delete hot region meet error", errs.ZapError(err))
+			}
 		case <-h.hotRegionInfoCtx.Done():
 			return
 		}

pkg/tso/allocator_manager.go

@@ -624,11 +624,13 @@
 	dcLocationInfo *pdpb.GetDCLocationInfoResponse,
 	isNextLeader bool,
 ) {
-	log.Info("start to campaign local tso allocator leader",
+	logger := log.With(
 		logutil.CondUint32("keyspace-group-id", am.kgID, am.kgID > 0),
 		zap.String("dc-location", allocator.GetDCLocation()),
 		zap.Any("dc-location-info", dcLocationInfo),
-		zap.String("name", am.member.Name()))
+		zap.String("name", am.member.Name()),
+	)
+	logger.Info("start to campaign local tso allocator leader")
 	cmps := make([]clientv3.Cmp, 0)
 	nextLeaderKey := am.nextLeaderKey(allocator.GetDCLocation())
 	if !isNextLeader {
@@ -648,18 +650,9 @@
 	})
 	if err := allocator.CampaignAllocatorLeader(am.leaderLease, cmps...); err != nil {
 		if err.Error() == errs.ErrEtcdTxnConflict.Error() {
-			log.Info("failed to campaign local tso allocator leader due to txn conflict, another allocator may campaign successfully",
-				logutil.CondUint32("keyspace-group-id", am.kgID, am.kgID > 0),
-				zap.String("dc-location", allocator.GetDCLocation()),
-				zap.Any("dc-location-info", dcLocationInfo),
-				zap.String("name", am.member.Name()))
+			logger.Info("failed to campaign local tso allocator leader due to txn conflict, another allocator may campaign successfully")
 		} else {
-			log.Error("failed to campaign local tso allocator leader due to etcd error",
-				logutil.CondUint32("keyspace-group-id", am.kgID, am.kgID > 0),
-				zap.String("dc-location", allocator.GetDCLocation()),
-				zap.Any("dc-location-info", dcLocationInfo),
-				zap.String("name", am.member.Name()),
-				errs.ZapError(err))
+			logger.Error("failed to campaign local tso allocator leader due to etcd error", errs.ZapError(err))
 		}
 		return
 	}
@@ -670,44 +663,25 @@
 	defer am.ResetAllocatorGroup(allocator.GetDCLocation())
 	// Maintain the Local TSO Allocator leader
 	go allocator.KeepAllocatorLeader(ctx)
-	log.Info("campaign local tso allocator leader ok",
-		logutil.CondUint32("keyspace-group-id", am.kgID, am.kgID > 0),
-		zap.String("dc-location", allocator.GetDCLocation()),
-		zap.Any("dc-location-info", dcLocationInfo),
-		zap.String("name", am.member.Name()))
 
-	log.Info("initialize the local TSO allocator",
-		logutil.CondUint32("keyspace-group-id", am.kgID, am.kgID > 0),
-		zap.String("dc-location", allocator.GetDCLocation()),
-		zap.Any("dc-location-info", dcLocationInfo),
-		zap.String("name", am.member.Name()))
+	logger.Info("Complete campaign local tso allocator leader, begin to initialize the local TSO allocator")
 	if err := allocator.Initialize(int(dcLocationInfo.Suffix)); err != nil {
-		log.Error("failed to initialize the local TSO allocator",
-			logutil.CondUint32("keyspace-group-id", am.kgID, am.kgID > 0),
-			zap.String("dc-location", allocator.GetDCLocation()),
-			zap.Any("dc-location-info", dcLocationInfo),
-			errs.ZapError(err))
+		log.Error("failed to initialize the local TSO allocator", errs.ZapError(err))
 		return
 	}
 	if dcLocationInfo.GetMaxTs().GetPhysical() != 0 {
 		if err := allocator.WriteTSO(dcLocationInfo.GetMaxTs()); err != nil {
-			log.Error("failed to write the max local TSO after member changed",
-				logutil.CondUint32("keyspace-group-id", am.kgID, am.kgID > 0),
-				zap.String("dc-location", allocator.GetDCLocation()),
-				zap.Any("dc-location-info", dcLocationInfo),
-				errs.ZapError(err))
+			log.Error("failed to write the max local TSO after member changed", errs.ZapError(err))
 			return
 		}
 	}
 	am.compareAndSetMaxSuffix(dcLocationInfo.Suffix)
 	allocator.EnableAllocatorLeader()
 	// The next leader is me, delete it to finish campaigning
-	am.deleteNextLeaderID(allocator.GetDCLocation())
-	log.Info("local tso allocator leader is ready to serve",
-		logutil.CondUint32("keyspace-group-id", am.kgID, am.kgID > 0),
-		zap.String("dc-location", allocator.GetDCLocation()),
-		zap.Any("dc-location-info", dcLocationInfo),
-		zap.String("name", am.member.Name()))
+	if err := am.deleteNextLeaderID(allocator.GetDCLocation()); err != nil {
+		logger.Warn("failed to delete next leader key after campaign local tso allocator leader", errs.ZapError(err))
+	}
+	logger.Info("local tso allocator leader is ready to serve")
 
 	leaderTicker := time.NewTicker(mcsutils.LeaderTickInterval)
 	defer leaderTicker.Stop()
@@ -716,20 +690,12 @@
 		select {
 		case <-leaderTicker.C:
 			if !allocator.IsAllocatorLeader() {
-				log.Info("no longer a local tso allocator leader because lease has expired, local tso allocator leader will step down",
-					logutil.CondUint32("keyspace-group-id", am.kgID, am.kgID > 0),
-					zap.String("dc-location", allocator.GetDCLocation()),
-					zap.Any("dc-location-info", dcLocationInfo),
-					zap.String("name", am.member.Name()))
+				logger.Info("no longer a local tso allocator leader because lease has expired, local tso allocator leader will step down")
 				return
 			}
 		case <-ctx.Done():
 			// Server is closed and it should return nil.
-			log.Info("server is closed, reset the local tso allocator",
-				logutil.CondUint32("keyspace-group-id", am.kgID, am.kgID > 0),
-				zap.String("dc-location", allocator.GetDCLocation()),
-				zap.Any("dc-location-info", dcLocationInfo),
-				zap.String("name", am.member.Name()))
+			logger.Info("server is closed, reset the local tso allocator")
 			return
 		}
 	}

plugin/scheduler_example/evict_leader.go

@@ -259,7 +259,7 @@ func (handler *evictLeaderHandler) UpdateConfig(w http.ResponseWriter, r *http.R
 		id = (uint64)(idFloat)
 		if _, exists = handler.config.StoreIDWitRanges[id]; !exists {
 			if err := handler.config.cluster.PauseLeaderTransfer(id); err != nil {
-				handler.rd.JSON(w, http.StatusInternalServerError, err.Error())
+				_ = handler.rd.JSON(w, http.StatusInternalServerError, err.Error())
 				return
 			}
 		}
@@ -273,47 +273,55 @@ func (handler *evictLeaderHandler) UpdateConfig(w http.ResponseWriter, r *http.R
 		args = append(args, handler.config.getRanges(id)...)
 	}
 
-	handler.config.BuildWithArgs(args)
-	err := handler.config.Persist()
+	err := handler.config.BuildWithArgs(args)
 	if err != nil {
-		handler.rd.JSON(w, http.StatusInternalServerError, err.Error())
+		_ = handler.rd.JSON(w, http.StatusBadRequest, err.Error())
+		return
 	}
-	handler.rd.JSON(w, http.StatusOK, nil)
+	err = handler.config.Persist()
+	if err != nil {
+		_ = handler.rd.JSON(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	_ = handler.rd.JSON(w, http.StatusOK, nil)
 }
 
 func (handler *evictLeaderHandler) ListConfig(w http.ResponseWriter, _ *http.Request) {
 	conf := handler.config.Clone()
-	handler.rd.JSON(w, http.StatusOK, conf)
+	_ = handler.rd.JSON(w, http.StatusOK, conf)
 }
 
 func (handler *evictLeaderHandler) DeleteConfig(w http.ResponseWriter, r *http.Request) {
 	idStr := mux.Vars(r)["store_id"]
 	id, err := strconv.ParseUint(idStr, 10, 64)
 	if err != nil {
-		handler.rd.JSON(w, http.StatusBadRequest, err.Error())
+		_ = handler.rd.JSON(w, http.StatusBadRequest, err.Error())
 		return
 	}
 
 	handler.config.mu.Lock()
 	defer handler.config.mu.Unlock()
 	_, exists := handler.config.StoreIDWitRanges[id]
-	if exists {
-		delete(handler.config.StoreIDWitRanges, id)
-		handler.config.cluster.ResumeLeaderTransfer(id)
+	if !exists {
+		_ = handler.rd.JSON(w, http.StatusInternalServerError, errors.New("the config does not exist"))
+		return
+	}
+	delete(handler.config.StoreIDWitRanges, id)
+	handler.config.cluster.ResumeLeaderTransfer(id)
 
-		handler.config.mu.Unlock()
-		handler.config.Persist()
+	handler.config.mu.Unlock()
+	if err := handler.config.Persist(); err != nil {
 		handler.config.mu.Lock()
-
-		var resp any
-		if len(handler.config.StoreIDWitRanges) == 0 {
-			resp = noStoreInSchedulerInfo
-		}
-		handler.rd.JSON(w, http.StatusOK, resp)
+		_ = handler.rd.JSON(w, http.StatusInternalServerError, err.Error())
 		return
 	}
+	handler.config.mu.Lock()
 
-	handler.rd.JSON(w, http.StatusInternalServerError, errors.New("the config does not exist"))
+	var resp any
+	if len(handler.config.StoreIDWitRanges) == 0 {
+		resp = noStoreInSchedulerInfo
+	}
+	_ = handler.rd.JSON(w, http.StatusOK, resp)
 }
 
 func newEvictLeaderHandler(config *evictLeaderSchedulerConfig) http.Handler {