cherry pick tikv#2853 to release-4.0

Signed-off-by: ti-srebot <ti-srebot@pingcap.com>

client/base_client.go

@@ -138,7 +138,7 @@ func (c *baseClient) leaderLoop() {
 		}
 
 		if err := c.updateLeader(); err != nil {
-			log.Error("[pd] failed updateLeader", errs.ZapError(errs.ErrUpdateLeader, err))
+			log.Error("[pd] failed updateLeader", errs.ZapError(err))
 		}
 	}
 }
@@ -178,7 +178,7 @@ func (c *baseClient) initClusterID() error {
 		members, err := c.getMembers(timeoutCtx, u)
 		timeoutCancel()
 		if err != nil || members.GetHeader() == nil {
-			log.Warn("[pd] failed to get cluster id", zap.String("url", u), errs.ZapError(errs.ErrGetClusterID, err))
+			log.Warn("[pd] failed to get cluster id", zap.String("url", u), errs.ZapError(err))
 			continue
 		}
 		c.clusterID = members.GetHeader().GetClusterId()
@@ -192,7 +192,7 @@ func (c *baseClient) updateLeader() error {
 		ctx, cancel := context.WithTimeout(c.ctx, updateLeaderTimeout)
 		members, err := c.getMembers(ctx, u)
 		if err != nil {
-			log.Warn("[pd] cannot update leader", zap.String("address", u), errs.ZapError(errs.ErrUpdateLeader, err))
+			log.Warn("[pd] cannot update leader", zap.String("address", u), errs.ZapError(err))
 		}
 		cancel()
 		if err != nil || members.GetLeader() == nil || len(members.GetLeader().GetClientUrls()) == 0 {
@@ -206,7 +206,7 @@ func (c *baseClient) updateLeader() error {
 		c.updateURLs(members.GetMembers())
 		return c.switchLeader(members.GetLeader().GetClientUrls())
 	}
-	return errors.Errorf("failed to get leader from %v", c.urls)
+	return errs.ErrClientGetLeader.FastGenByArgs(c.urls)
 }
 
 func (c *baseClient) getMembers(ctx context.Context, url string) (*pdpb.GetMembersResponse, error) {
@@ -217,7 +217,7 @@ func (c *baseClient) getMembers(ctx context.Context, url string) (*pdpb.GetMembe
 	members, err := pdpb.NewPDClient(cc).GetMembers(ctx, &pdpb.GetMembersRequest{})
 	if err != nil {
 		attachErr := errors.Errorf("error:%s target:%s status:%s", err, cc.Target(), cc.GetState().String())
-		return nil, errors.WithStack(attachErr)
+		return nil, errs.ErrClientGetMember.Wrap(attachErr).GenWithStackByCause()
 	}
 	return members, nil
 }
@@ -274,13 +274,13 @@ func (c *baseClient) getOrCreateGRPCConn(addr string) (*grpc.ClientConn, error)
 		KeyPath:  c.security.KeyPath,
 	}.ToTLSConfig()
 	if err != nil {
-		return nil, errors.WithStack(err)
+		return nil, err
 	}
 	dctx, cancel := context.WithTimeout(c.ctx, dialTimeout)
 	defer cancel()
 	cc, err := grpcutil.GetClientConn(dctx, addr, tlsCfg, c.gRPCDialOptions...)
 	if err != nil {
-		return nil, errors.WithStack(err)
+		return nil, err
 	}
 	c.connMu.Lock()
 	defer c.connMu.Unlock()

client/client.go

@@ -180,7 +180,7 @@ func (c *client) tsCancelLoop() {
 		case d := <-c.tsDeadlineCh:
 			select {
 			case <-d.timer:
-				log.Error("tso request is canceled due to timeout")
+				log.Error("tso request is canceled due to timeout", errs.ZapError(errs.ErrClientGetTSOTimeout))
 				d.cancel()
 			case <-d.done:
 			case <-ctx.Done():
@@ -233,7 +233,7 @@ func (c *client) tsLoop() {
 					return
 				default:
 				}
-				log.Error("[pd] create tso stream error", errs.ZapError(errs.ErrCreateTSOStream, err))
+				log.Error("[pd] create tso stream error", errs.ZapError(errs.ErrClientCreateTSOStream, err))
 				c.ScheduleCheckLeader()
 				cancel()
 				c.revokeTSORequest(errors.WithStack(err))
@@ -281,7 +281,7 @@ func (c *client) tsLoop() {
 				return
 			default:
 			}
-			log.Error("[pd] getTS error", errs.ZapError(errs.ErrGetTSO, err))
+			log.Error("[pd] getTS error", errs.ZapError(errs.ErrClientGetTSO, err))
 			c.ScheduleCheckLeader()
 			cancel()
 			stream, cancel = nil, nil

pkg/apiutil/serverapi/middleware.go

@@ -20,6 +20,7 @@ import (
 	"strings"
 
 	"github.com/pingcap/log"
+	"github.com/tikv/pd/pkg/errs"
 	"github.com/tikv/pd/server"
 	"github.com/tikv/pd/server/config"
 	"github.com/urfave/negroni"
@@ -145,14 +146,14 @@ func (p *customReverseProxies) ServeHTTP(w http.ResponseWriter, r *http.Request)
 
 		resp, err := p.client.Do(r)
 		if err != nil {
-			log.Error("request failed", zap.Error(err))
+			log.Error("request failed", errs.ZapError(errs.ErrSendRequest, err))
 			continue
 		}
 
 		b, err := ioutil.ReadAll(resp.Body)
 		resp.Body.Close()
 		if err != nil {
-			log.Error("request failed", zap.Error(err))
+			log.Error("read failed", errs.ZapError(errs.ErrIORead, err))
 			continue
 		}
 

pkg/dashboard/adapter/manager.go

@@ -21,7 +21,6 @@ import (
 
 	"github.com/pingcap-incubator/tidb-dashboard/pkg/apiserver"
 	"github.com/pingcap/kvproto/pkg/pdpb"
-	"go.uber.org/zap"
 
 	"github.com/pingcap/log"
 	"github.com/tikv/pd/pkg/errs"
@@ -106,7 +105,7 @@ func (m *Manager) updateInfo() {
 
 	var err error
 	if m.members, err = cluster.GetMembers(m.srv.GetClient()); err != nil {
-		log.Warn("failed to get members", zap.Error(err))
+		log.Warn("failed to get members", errs.ZapError(err))
 		m.members = nil
 		return
 	}
@@ -196,7 +195,7 @@ func (m *Manager) startService() {
 		return
 	}
 	if err := m.service.Start(m.ctx); err != nil {
-		log.Error("Can not start dashboard server", errs.ZapError(errs.ErrStartDashboard, err))
+		log.Error("Can not start dashboard server", errs.ZapError(errs.ErrDashboardStart, err))
 	} else {
 		log.Info("Dashboard server is started")
 	}
@@ -207,7 +206,7 @@ func (m *Manager) stopService() {
 		return
 	}
 	if err := m.service.Stop(context.Background()); err != nil {
-		log.Error("Stop dashboard server error", errs.ZapError(errs.ErrStopDashboard, err))
+		log.Error("Stop dashboard server error", errs.ZapError(errs.ErrDashboardStop, err))
 	} else {
 		log.Info("Dashboard server is stopped")
 	}

pkg/errs/errno.go

@@ -15,38 +15,39 @@ package errs
 
 import "github.com/pingcap/errors"
 
+// The internal error which is generated in PD project.
 // tso errors
 var (
 	ErrInvalidTimestamp    = errors.Normalize("invalid timestamp", errors.RFCCodeText("PD:tso:ErrInvalidTimestamp"))
 	ErrLogicOverflow       = errors.Normalize("logic part overflow", errors.RFCCodeText("PD:tso:ErrLogicOverflow"))
 	ErrIncorrectSystemTime = errors.Normalize("incorrect system time", errors.RFCCodeText("PD:tso:ErrIncorrectSystemTime"))
 )
 
-// adapter errors
+// member errors
 var (
-	ErrStartDashboard = errors.Normalize("start dashboard failed", errors.RFCCodeText("PD:adapter:ErrStartDashboard"))
-	ErrStopDashboard  = errors.Normalize("stop dashboard failed", errors.RFCCodeText("PD:adapter:ErrStopDashboard"))
+	ErrEtcdLeaderNotFound = errors.Normalize("etcd leader not found", errors.RFCCodeText("PD:member:ErrEtcdLeaderNotFound"))
+	ErrMarshalLeader      = errors.Normalize("marshal leader failed", errors.RFCCodeText("PD:member:ErrMarshalLeader"))
 )
 
-// member errors
+// client errors
 var (
-	ErretcdLeaderNotFound     = errors.Normalize("etcd leader not found", errors.RFCCodeText("PD:member:ErretcdLeaderNotFound"))
-	ErrGetLeader              = errors.Normalize("get leader failed", errors.RFCCodeText("PD:member:ErrGetLeader"))
-	ErrDeleteLeaderKey        = errors.Normalize("delete leader key failed", errors.RFCCodeText("PD:member:ErrDeleteLeaderKey"))
-	ErrLoadLeaderPriority     = errors.Normalize("load leader priority failed", errors.RFCCodeText("PD:member:ErrLoadLeaderPriority"))
-	ErrLoadetcdLeaderPriority = errors.Normalize("load etcd leader priority failed", errors.RFCCodeText("PD:member:ErrLoadetcdLeaderPriority"))
-	ErrTransferetcdLeader     = errors.Normalize("transfer etcd leader failed", errors.RFCCodeText("PD:member:ErrTransferetcdLeader"))
-	ErrWatcherCancel          = errors.Normalize("watcher canceled", errors.RFCCodeText("PD:member:ErrWatcherCancel"))
-	ErrMarshalLeader          = errors.Normalize("marshal leader failed", errors.RFCCodeText("PD:member:ErrMarshalLeader"))
+	ErrWatcherCancel         = errors.Normalize("watcher canceled", errors.RFCCodeText("PD:member:ErrWatcherCancel"))
+	ErrClientCreateTSOStream = errors.Normalize("create TSO stream failed", errors.RFCCodeText("PD:client:ErrClientCreateTSOStream"))
+	ErrClientGetTSOTimeout   = errors.Normalize("get TSO timeout", errors.RFCCodeText("PD:client:ErrClientGetTSOTimeout"))
+	ErrClientGetTSO          = errors.Normalize("get TSO failed", errors.RFCCodeText("PD:client:ErrClientGetTSO"))
+	ErrClientGetLeader       = errors.Normalize("get leader from %v error", errors.RFCCodeText("PD:client:ErrClientGetLeader"))
+	ErrClientGetMember       = errors.Normalize("get member failed", errors.RFCCodeText("PD:client:ErrClientGetMember"))
 )
 
-// client errors
+// scheduler errors
 var (
-	ErrCloseGRPCConn   = errors.Normalize("close gRPC connection failed", errors.RFCCodeText("PD:client:ErrCloseGRPCConn"))
-	ErrUpdateLeader    = errors.Normalize("update leader failed", errors.RFCCodeText("PD:client:ErrUpdateLeader"))
-	ErrCreateTSOStream = errors.Normalize("create TSO stream failed", errors.RFCCodeText("PD:client:ErrCreateTSOStream"))
-	ErrGetTSO          = errors.Normalize("get TSO failed", errors.RFCCodeText("PD:client:ErrGetTSO"))
-	ErrGetClusterID    = errors.Normalize("get cluster ID failed", errors.RFCCodeText("PD:client:ErrGetClusterID"))
+	ErrGetSourceStore         = errors.Normalize("failed to get the source store", errors.RFCCodeText("PD:scheduler:ErrGetSourceStore"))
+	ErrSchedulerExisted       = errors.Normalize("scheduler existed", errors.RFCCodeText("PD:scheduler:ErrSchedulerExisted"))
+	ErrSchedulerNotFound      = errors.Normalize("scheduler not found", errors.RFCCodeText("PD:scheduler:ErrSchedulerNotFound"))
+	ErrScheduleConfigNotExist = errors.Normalize("the config does not exist", errors.RFCCodeText("PD:scheduler:ErrScheduleConfigNotExist"))
+	ErrSchedulerConfig        = errors.Normalize("wrong scheduler config %s", errors.RFCCodeText("PD:scheduler:ErrSchedulerConfig"))
+	ErrCacheOverflow          = errors.Normalize("cache overflow", errors.RFCCodeText("PD:scheduler:ErrCacheOverflow"))
+	ErrInternalGrowth         = errors.Normalize("unknown interval growth type error", errors.RFCCodeText("PD:scheduler:ErrInternalGrowth"))
 )
 
 // placement errors
@@ -57,29 +58,94 @@ var (
 	ErrBuildRuleList = errors.Normalize("build rule list failed, %s", errors.RFCCodeText("PD:placement:ErrBuildRuleList"))
 )
 
-// kv errors
+// cluster errors
 var (
-	ErrEtcdKVSave   = errors.Normalize("etcd KV save failed", errors.RFCCodeText("PD:kv:ErrEtcdKVSave"))
-	ErrEtcdKVRemove = errors.Normalize("etcd KV remove failed", errors.RFCCodeText("PD:kv:ErrEtcdKVRemove"))
+	ErrPersistStore          = errors.Normalize("failed to persist store", errors.RFCCodeText("PD:cluster:ErrPersistStore"))
+	ErrDeleteRegion          = errors.Normalize("failed to delete region from storage", errors.RFCCodeText("PD:cluster:ErrDeleteRegion"))
+	ErrSaveRegion            = errors.Normalize("failed to save region from storage", errors.RFCCodeText("PD:cluster:ErrSaveRegion"))
+	ErrBuryStore             = errors.Normalize("failed to bury store", errors.RFCCodeText("PD:cluster:ErrBuryStore"))
+	ErrDeleteStore           = errors.Normalize("failed to delete store", errors.RFCCodeText("PD:cluster:ErrDeleteStore"))
+	ErrPersistClusterVersion = errors.Normalize("persist cluster version meet error", errors.RFCCodeText("PD:cluster:ErrPersistClusterVersion"))
+	ErrGetMembers            = errors.Normalize("get members failed", errors.RFCCodeText("PD:cluster:ErrGetMembers"))
 )
 
-// scheduler errors
+// grpcutil errors
 var (
-	ErrGetSourceStore         = errors.Normalize("failed to get the source store", errors.RFCCodeText("PD:scheduler:ErrGetSourceStore"))
-	ErrSchedulerExisted       = errors.Normalize("scheduler existed", errors.RFCCodeText("PD:scheduler:ErrSchedulerExisted"))
-	ErrSchedulerNotFound      = errors.Normalize("scheduler not found", errors.RFCCodeText("PD:scheduler:ErrSchedulerNotFound"))
-	ErrScheduleConfigNotExist = errors.Normalize("the config does not exist", errors.RFCCodeText("PD:scheduler:ErrScheduleConfigNotExist"))
-	ErrSchedulerConfig        = errors.Normalize("wrong scheduler config %s", errors.RFCCodeText("PD:scheduler:ErrSchedulerConfig"))
-	ErrCacheOverflow          = errors.Normalize("cache overflow", errors.RFCCodeText("PD:scheduler:ErrCacheOverflow"))
-	ErrInternalGrowth         = errors.Normalize("unknown interval growth type error", errors.RFCCodeText("PD:scheduler:ErrInternalGrowth"))
+	ErrSecurityConfig = errors.Normalize("security config error: %s", errors.RFCCodeText("PD:grpcutil:ErrSecurityConfig"))
+)
+
+// The third-party project error.
+// url errors
+var (
+	ErrURLParse      = errors.Normalize("parse url error", errors.RFCCodeText("PD:url:ErrURLParse"))
+	ErrQueryUnescape = errors.Normalize("inverse transformation of QueryEscape error", errors.RFCCodeText("PD:url:ErrQueryUnescape"))
+)
+
+// grpc errors
+var (
+	ErrGRPCDial      = errors.Normalize("dial error", errors.RFCCodeText("PD:grpc:ErrGRPCDial"))
+	ErrCloseGRPCConn = errors.Normalize("close gRPC connection failed", errors.RFCCodeText("PD:grpc:ErrCloseGRPCConn"))
+)
+
+// proto errors
+var (
+	ErrProtoUnmarshal = errors.Normalize("failed to unmarshal proto", errors.RFCCodeText("PD:proto:ErrProtoUnmarshal"))
+)
+
+// etcd errors
+var (
+	ErrNewEtcdClient     = errors.Normalize("new etcd client failed", errors.RFCCodeText("PD:etcd:ErrNewEtcdClient"))
+	ErrStartEtcd         = errors.Normalize("start etcd failed", errors.RFCCodeText("PD:etcd:ErrStartEtcd"))
+	ErrEtcdURLMap        = errors.Normalize("etcd url map error", errors.RFCCodeText("PD:etcd:ErrEtcdURLMap"))
+	ErrEtcdGrantLease    = errors.Normalize("etcd lease failed", errors.RFCCodeText("PD:etcd:ErrEtcdGrantLease"))
+	ErrEtcdTxn           = errors.Normalize("etcd Txn failed", errors.RFCCodeText("PD:etcd:ErrEtcdTxn"))
+	ErrEtcdKVPut         = errors.Normalize("etcd KV put failed", errors.RFCCodeText("PD:etcd:ErrEtcdKVPut"))
+	ErrEtcdKVDelete      = errors.Normalize("etcd KV delete failed", errors.RFCCodeText("PD:etcd:ErrEtcdKVDelete"))
+	ErrEtcdKVGet         = errors.Normalize("etcd KV get failed", errors.RFCCodeText("PD:etcd:ErrEtcdKVGet"))
+	ErrEtcdKVGetResponse = errors.Normalize("etcd invalid get value response %v, must only one", errors.RFCCodeText("PD:etcd:ErrEtcdKVGetResponse"))
+	ErrEtcdGetCluster    = errors.Normalize("etcd get cluster from remote peer failed", errors.RFCCodeText("PD:etcd:ErrEtcdGetCluster"))
+	ErrEtcdMoveLeader    = errors.Normalize("etcd move leader error", errors.RFCCodeText("PD:etcd:ErrEtcdMoveLeader"))
+	ErrEtcdTLSConfig     = errors.Normalize("etcd TLS config error", errors.RFCCodeText("PD:etcd:ErrEtcdTLSConfig"))
+	ErrEtcdWatcherCancel = errors.Normalize("watcher canceled", errors.RFCCodeText("PD:etcd:ErrEtcdWatcherCancel"))
+	ErrCloseEtcdClient   = errors.Normalize("close etcd client failed", errors.RFCCodeText("PD:etcd:ErrCloseEtcdClient"))
+	ErrEtcdMemberList    = errors.Normalize("etcd member list failed", errors.RFCCodeText("PD:etcd:ErrEtcdMemberList"))
+)
+
+// dashboard errors
+var (
+	ErrDashboardStart = errors.Normalize("start dashboard failed", errors.RFCCodeText("PD:dashboard:ErrDashboardStart"))
+	ErrDashboardStop  = errors.Normalize("stop dashboard failed", errors.RFCCodeText("PD:dashboard:ErrDashboardStop"))
 )
 
 // strconv errors
 var (
+	ErrStrconvParseInt  = errors.Normalize("parse int error", errors.RFCCodeText("PD:strconv:ErrStrconvParseInt"))
 	ErrStrconvParseUint = errors.Normalize("parse uint error", errors.RFCCodeText("PD:strconv:ErrStrconvParseUint"))
 )
 
-// url errors
+// prometheus errors
 var (
-	ErrQueryUnescape = errors.Normalize("inverse transformation of QueryEscape error", errors.RFCCodeText("PD:url:ErrQueryUnescape"))
+	ErrPrometheusPushMetrics = errors.Normalize("push metrics to gateway failed", errors.RFCCodeText("PD:prometheus:ErrPrometheusPushMetrics"))
+)
+
+// http errors
+var (
+	ErrSendRequest    = errors.Normalize("send HTTP request failed", errors.RFCCodeText("PD:http:ErrSendRequest"))
+	ErrWriteHTTPBody  = errors.Normalize("write HTTP body failed", errors.RFCCodeText("PD:http:ErrWriteHTTPBody"))
+	ErrNewHTTPRequest = errors.Normalize("new HTTP request failed", errors.RFCCodeText("PD:http:ErrNewHTTPRequest"))
+)
+
+// ioutil error
+var (
+	ErrIORead = errors.Normalize("IO read error", errors.RFCCodeText("PD:ioutil:ErrIORead"))
+)
+
+// netstat error
+var (
+	ErrNetstatTCPSocks = errors.Normalize("TCP socks error", errors.RFCCodeText("PD:netstat:ErrNetstatTCPSocks"))
+)
+
+// hex error
+var (
+	ErrHexDecodingString = errors.Normalize("decode string %s error", errors.RFCCodeText("PD:hex:ErrHexDecodingString"))
 )

pkg/errs/errs.go

@@ -21,6 +21,9 @@ import (
 
 // ZapError is used to make the log output eaiser.
 func ZapError(err error, causeError ...error) zap.Field {
+	if err == nil {
+		return zap.Skip()
+	}
 	if e, ok := err.(*errors.Error); ok {
 		if len(causeError) >= 1 {
 			err = e.Wrap(causeError[0]).FastGenWithCause()

pkg/errs/errs_test.go

@@ -16,6 +16,7 @@ package errs
 import (
 	"bytes"
 	"fmt"
+	"strconv"
 	"strings"
 	"testing"
 
@@ -127,3 +128,18 @@ func (s *testErrorSuite) TestZapError(c *C) {
 	log.Info("test", ZapError(err1))
 	log.Info("test", ZapError(err1, err))
 }
+
+func (s *testErrorSuite) TestErrorWithStack(c *C) {
+	conf := &log.Config{Level: "debug", File: log.FileLogConfig{}, DisableTimestamp: true}
+	lg := newZapTestLogger(conf)
+	log.ReplaceGlobals(lg.Logger, nil)
+
+	_, err := strconv.ParseUint("-42", 10, 64)
+	log.Error("test", ZapError(ErrStrconvParseInt.Wrap(err).GenWithStackByCause()))
+	m1 := lg.Message()
+	log.Error("test", zap.Error(errors.WithStack(err)))
+	m2 := lg.Message()
+	// This test is based on line number and the first log is in line 141, the second is in line 142.
+	// So they have the same length stack. Move this test to another place need to change the corresponding length.
+	c.Assert(len(m1[strings.Index(m1, "[stack="):]), Equals, len(m2[strings.Index(m2, "[stack="):]))
+}