diff --git a/backend/database/mongo.go b/backend/database/mongo.go
index 5d205ae4..01204a70 100644
--- a/backend/database/mongo.go
+++ b/backend/database/mongo.go
@@ -1,9 +1,14 @@
 package database
 
 import (
+	"crawlab/constants"
+	"github.com/apex/log"
+	"github.com/cenkalti/backoff/v4"
 	"github.com/globalsign/mgo"
+	"github.com/globalsign/mgo/bson"
 	"github.com/spf13/viper"
 	"net"
+	"reflect"
 	"time"
 )
 
@@ -31,6 +36,28 @@ func GetGridFs(prefix string) (*mgo.Session, *mgo.GridFS) {
 	return s, gf
 }
 
+func FillNullObjectId(doc interface{}) {
+	t := reflect.TypeOf(doc)
+	if t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+	if t.Kind() != reflect.Struct {
+		return
+	}
+	v := reflect.ValueOf(doc)
+	for i := 0; i < t.NumField(); i++ {
+		ft := t.Field(i)
+		fv := v.Elem().Field(i)
+		val := fv.Interface()
+		switch val.(type) {
+		case bson.ObjectId:
+			if !val.(bson.ObjectId).Valid() {
+				v.FieldByName(ft.Name).Set(reflect.ValueOf(bson.ObjectIdHex(constants.ObjectIdNull)))
+			}
+		}
+	}
+}
+
 func InitMongo() error {
 	var mongoHost = viper.GetString("mongo.host")
 	var mongoPort = viper.GetString("mongo.port")
@@ -61,37 +88,16 @@ func InitMongo() error {
 			dialInfo.Password = mongoPassword
 			dialInfo.Source = mongoAuth
 		}
+		bp := backoff.NewExponentialBackOff()
+		var err error
 
-		// mongo session
-		var sess *mgo.Session
-
-		// 错误次数
-		errNum := 0
-
-		// 重复尝试连接mongo
-		for {
-			var err error
-
-			// 连接mongo
-			sess, err = mgo.DialWithInfo(&dialInfo)
-
+		err = backoff.Retry(func() error {
+			Session, err = mgo.DialWithInfo(&dialInfo)
 			if err != nil {
-				// 如果连接错误，休息1秒，错误次数+1
-				time.Sleep(1 * time.Second)
-				errNum++
-
-				// 如果错误次数超过30，返回错误
-				if errNum >= 30 {
-					return err
-				}
-			} else {
-				// 如果没有错误，退出循环
-				break
+				log.WithError(err).Warnf("waiting for connect mongo database, after %f seconds try again.", bp.NextBackOff().Seconds())
 			}
-		}
-
-		// 赋值给全局mongo session
-		Session = sess
+			return err
+		}, bp)
 	}
 	//Add Unique index for 'key'
 	keyIndex := mgo.Index{
diff --git a/backend/database/pubsub.go b/backend/database/pubsub.go
index 444ce91a..fcb80b3e 100644
--- a/backend/database/pubsub.go
+++ b/backend/database/pubsub.go
@@ -77,6 +77,7 @@ func (r *Redis) Subscribe(ctx context.Context, consume ConsumeFunc, channel ...s
 			fmt.Println(err)
 
 			if err == nil {
+				index = 0
 				break
 			}
 			time.Sleep(5 * time.Second)
diff --git a/backend/database/redis.go b/backend/database/redis.go
index d93491f8..12687368 100644
--- a/backend/database/redis.go
+++ b/backend/database/redis.go
@@ -6,6 +6,7 @@ import (
 	"crawlab/utils"
 	"errors"
 	"github.com/apex/log"
+	"github.com/cenkalti/backoff/v4"
 	"github.com/gomodule/redigo/redis"
 	"github.com/spf13/viper"
 	"runtime/debug"
@@ -77,11 +78,15 @@ func (r *Redis) HSet(collection string, key string, value string) error {
 	}
 	return nil
 }
-
+func (r *Redis) Ping() error {
+	c := r.pool.Get()
+	defer utils.Close(c)
+	_, err2 := redis.String(c.Do("PING"))
+	return err2
+}
 func (r *Redis) HGet(collection string, key string) (string, error) {
 	c := r.pool.Get()
 	defer utils.Close(c)
-
 	value, err2 := redis.String(c.Do("HGET", collection, key))
 	if err2 != nil && err2 != redis.ErrNil {
 		log.Error(err2.Error())
@@ -102,7 +107,34 @@ func (r *Redis) HDel(collection string, key string) error {
 	}
 	return nil
 }
+func (r *Redis) HScan(collection string) (results []string, err error) {
+	c := r.pool.Get()
+	defer utils.Close(c)
+	var (
+		cursor int64
+		items  []string
+	)
 
+	for {
+		values, err := redis.Values(c.Do("HSCAN", collection, cursor))
+		if err != nil {
+			return results, err
+		}
+
+		values, err = redis.Scan(values, &cursor, &items)
+		if err != nil {
+			return results, err
+		}
+
+		results = append(results, items[1])
+
+		if cursor == 0 {
+			break
+		}
+	}
+	return results, err
+
+}
 func (r *Redis) HKeys(collection string) ([]string, error) {
 	c := r.pool.Get()
 	defer utils.Close(c)
@@ -167,7 +199,17 @@ func NewRedisPool() *redis.Pool {
 
 func InitRedis() error {
 	RedisClient = NewRedisClient()
-	return nil
+	b := backoff.NewExponentialBackOff()
+	b.MaxInterval = 20 * time.Second
+	err := backoff.Retry(func() error {
+		err := RedisClient.Ping()
+
+		if err != nil {
+			log.WithError(err).Warnf("waiting for redis pool active connection. will after %f seconds try  again.", b.NextBackOff().Seconds())
+		}
+		return err
+	}, b)
+	return err
 }
 
 func Pub(channel string, msg entity.NodeMessage) error {
diff --git a/backend/go.mod b/backend/go.mod
index 7354ec53..de0c468e 100644
--- a/backend/go.mod
+++ b/backend/go.mod
@@ -6,34 +6,39 @@ require (
 	github.com/Masterminds/semver v1.4.2 // indirect
 	github.com/Masterminds/sprig v2.16.0+incompatible // indirect
 	github.com/Unknwon/goconfig v0.0.0-20191126170842-860a72fb44fd
-	github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc
+	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751
 	github.com/aokoli/goutils v1.0.1 // indirect
-	github.com/apex/log v1.1.1
+	github.com/apex/log v1.1.4
+	github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6 // indirect
+	github.com/cenkalti/backoff/v4 v4.0.2
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible
-	github.com/fsnotify/fsnotify v1.4.7
+	github.com/fsnotify/fsnotify v1.4.9
 	github.com/gin-gonic/gin v1.6.3
 	github.com/globalsign/mgo v0.0.0-20181015135952-eeefdecb41b8
-	github.com/go-playground/validator/v10 v10.2.0
+	github.com/go-playground/validator/v10 v10.3.0
 	github.com/gomodule/redigo v2.0.0+incompatible
 	github.com/huandu/xstrings v1.2.0 // indirect
 	github.com/imdario/mergo v0.3.6 // indirect
-	github.com/imroc/req v0.2.4
+	github.com/imroc/req v0.3.0
 	github.com/jaytaylor/html2text v0.0.0-20180606194806-57d518f124b0 // indirect
 	github.com/matcornic/hermes v1.2.0
 	github.com/mattn/go-runewidth v0.0.3 // indirect
 	github.com/olekukonko/tablewriter v0.0.1 // indirect
-	github.com/olivere/elastic/v7 v7.0.14
+	github.com/olivere/elastic/v7 v7.0.15
 	github.com/pkg/errors v0.9.1
 	github.com/satori/go.uuid v1.2.0
-	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
-	github.com/smartystreets/goconvey v0.0.0-20190731233626-505e41936337
-	github.com/spf13/viper v1.4.0
+	github.com/smartystreets/goconvey v1.6.4
+	github.com/spf13/viper v1.7.0
 	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
 	github.com/swaggo/gin-swagger v1.2.0
-	github.com/swaggo/swag v1.5.1
+	github.com/swaggo/swag v1.6.6
+	github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77 // indirect
+	go.uber.org/atomic v1.6.0
+	golang.org/x/sys v0.0.0-20200420163511-1957bb5e6d1f // indirect
 	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
-	gopkg.in/gomail.v2 v2.0.0-20150902115704-41f357289737
+	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
+	gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df
 	gopkg.in/russross/blackfriday.v2 v2.0.0 // indirect
 	gopkg.in/src-d/go-git.v4 v4.13.1
-	gopkg.in/yaml.v2 v2.2.8
+	gopkg.in/yaml.v2 v2.3.0
 )
diff --git a/backend/go.sum b/backend/go.sum
index be19becf..c2ce0d11 100644
--- a/backend/go.sum
+++ b/backend/go.sum
@@ -1,6 +1,21 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/KyleBanks/depth v1.2.1 h1:5h8fQADFrWtarTdtDudMmGsC7GPbOAu6RVB3ffsVFHc=
+github.com/KyleBanks/depth v1.2.1/go.mod h1:jzSb9d0L43HxTQfT+oSA1EEp2q+ne2uh6XgeJcm8brE=
 github.com/Masterminds/semver v1.4.2 h1:WBLTQ37jOCzSLtXNdoo8bNM8876KhNqOKvrlGITgsTc=
 github.com/Masterminds/semver v1.4.2/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Masterminds/sprig v2.16.0+incompatible h1:QZbMUPxRQ50EKAq3LFMnxddMu88/EUUG3qmxwtDmPsY=
@@ -8,6 +23,8 @@ github.com/Masterminds/sprig v2.16.0+incompatible/go.mod h1:y6hNFY5UBTIWBxnzTeuN
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/PuerkitoBio/purell v1.1.0 h1:rmGxhojJlM0tuKtfdvliR84CFHljx9ag64t2xmVkjK4=
 github.com/PuerkitoBio/purell v1.1.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
+github.com/PuerkitoBio/purell v1.1.1 h1:WEQqlqaGbrPkxLJWfBwQmfEAE1Z7ONdDLqrN38tNFfI=
+github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 h1:d+Bc7a5rLufV/sSk/8dngufqelfh6jnri85riMAaF/M=
 github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
 github.com/Unknwon/goconfig v0.0.0-20191126170842-860a72fb44fd h1:+CYOsXi89xOqBkj7CuEJjA2It+j+R3ngUZEydr6mtkw=
@@ -16,6 +33,8 @@ github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7 h1:uSoVVbwJiQipAclBb
 github.com/alcortesm/tgz v0.0.0-20161220082320-9c5fe88206d7/go.mod h1:6zEj6s6u/ghQa61ZWa/C2Aw3RkjiTBOix7dkqa1VLIs=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc h1:cAKDfWh5VpdgMhJosfJnn5/FoN2SRZ4p7fJNX58YPaU=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 h1:JYp7IbQjafoB+tBA3gMyHYHrpOtNuDiK/uB5uXxq5wM=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 h1:kFOfPq6dUM1hTo4JG6LR5AXSUEsOjtdm0kw0FtQtMJA=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
@@ -23,9 +42,15 @@ github.com/aokoli/goutils v1.0.1 h1:7fpzNGoJ3VA8qcrm++XEE1QUe0mIwNeLa02Nwq7RDkg=
 github.com/aokoli/goutils v1.0.1/go.mod h1:SijmP0QR8LtwsmDs8Yii5Z/S4trXFGFC2oO5g9DP+DQ=
 github.com/apex/log v1.1.1 h1:BwhRZ0qbjYtTob0I+2M+smavV0kOC8XgcnGZcyL9liA=
 github.com/apex/log v1.1.1/go.mod h1:Ls949n1HFtXfbDcjiTTFQqkVUrte0puoIBfO3SVgwOA=
+github.com/apex/log v1.1.4 h1:3Zk+boorIQAAGBrHn0JUtAau4ihMamT4WdnfdnXM1zQ=
+github.com/apex/log v1.1.4/go.mod h1:AlpoD9aScyQfJDVHmLMEcx4oU6LqzkWp4Mg9GdAcEvQ=
+github.com/apex/logs v0.0.4/go.mod h1:XzxuLZ5myVHDy9SAmYpamKKRNApGj54PfYLcFrXqDwo=
 github.com/aphistic/golf v0.0.0-20180712155816-02c07f170c5a/go.mod h1:3NqKYiepwy8kCu4PNA+aP7WUV72eXWJeP9/r3/K9aLE=
 github.com/aphistic/sweet v0.2.0/go.mod h1:fWDlIh/isSE9n6EPsRmC0det+whmX6dJid3stzu0Xys=
+github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
+github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
 github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
 github.com/aws/aws-sdk-go v1.20.6/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
@@ -33,13 +58,21 @@ github.com/aws/aws-sdk-go v1.30.7/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU
 github.com/aybabtme/rgbterm v0.0.0-20170906152045-cc83f3b3ce59/go.mod h1:q/89r3U2H7sSsE2t6Kca0lfwTK8JdoNGS/yzM/4iH5I=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
+github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
+github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c/go.mod h1:MKsuJmJgSg28kpZDP6UIiPt0e0Oz0kqKNGyRaWEPv84=
+github.com/cenkalti/backoff/v4 v4.0.2 h1:JIufpQLbh4DkbQoii76ItQIUFzevQSqOLZca4eamEDs=
+github.com/cenkalti/backoff/v4 v4.0.2/go.mod h1:eEew/i+1Q6OrCDZh3WiXYv3+nJwBASZ8Bog/87DQnVg=
+github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
+github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
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@@ -56,6 +89,8 @@ github.com/fortytw2/leaktest v1.3.0 h1:u8491cBMTQ8ft8aeV+adlcytMZylmA5nnwwkRZjI8
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@@ -73,30 +108,40 @@ github.com/gliderlabs/ssh v0.2.2 h1:6zsha5zo/TWhRhwqCD3+EarCAgZ2yN28ipRnGPnwkI0=
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@@ -105,13 +150,17 @@ github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfU
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@@ -119,16 +168,42 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
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@@ -136,6 +211,8 @@ github.com/imdario/mergo v0.3.6 h1:xTNEAn+kxVO7dTZGu0CegyqKZmoWFI0rF8UxjlB2d28=
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@@ -150,6 +227,7 @@ github.com/json-iterator/go v1.1.6 h1:MrUvLMLTMxbqFJ9kzlvat/rYZqZnW3u4wkLzWTaFwK
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@@ -162,22 +240,27 @@ github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFB
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@@ -187,10 +270,18 @@ github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHX
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@@ -205,9 +296,12 @@ github.com/olekukonko/tablewriter v0.0.1 h1:b3iUnf1v+ppJiOfNX4yxxqfWKMQPZR5yoh8u
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@@ -218,6 +312,7 @@ github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
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@@ -229,8 +324,12 @@ github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084/go.mod h1:TjEm7z
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@@ -242,6 +341,8 @@ github.com/smartystreets/assertions v1.0.0/go.mod h1:kHHU4qYBaI3q23Pp3VPrmWhuIUr
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@@ -255,6 +356,8 @@ github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
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@@ -268,10 +371,15 @@ github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UV
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@@ -289,106 +397,188 @@ github.com/ugorji/go/codec v1.1.5-pre/go.mod h1:tULtS6Gy1AE1yCENaw4Vb//HLH5njI2t
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 golang.org/x/tools v0.0.0-20190729092621-ff9f1409240a h1:mEQZbbaBjWyLNy0tmZmgEuQAR8XOQ3hL8GYi3J/NG64=
 golang.org/x/tools v0.0.0-20190729092621-ff9f1409240a/go.mod h1:jcCCGcm9btYwXyDqrUWc6MKQKKGJCWEQ3AfLSRIbEuI=
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+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
+google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
+google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
+google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
+google.golang.org/api v0.13.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
+google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
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 google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
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 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
+google.golang.org/grpc v1.21.0 h1:G+97AoqBnmZIT91cLG/EkCoK9NSelj64P8bOHHNmGn0=
 google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
+google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc h1:2gGKlE2+asNV9m7xrywl36YYNnBG5ZQ0r/BOOxqPpmk=
 gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc/go.mod h1:m7x9LTH6d71AHyAX77c9yqWCCa3UKHcVEj9y7hAtKDk=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/go-playground/assert.v1 v1.2.1 h1:xoYuJVE7KT85PYWrN730RguIQO0ePzVRfFMXadIrXTM=
 gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
 gopkg.in/go-playground/validator.v8 v8.18.2 h1:lFB4DoMU6B626w8ny76MV7VX6W2VHct2GVOI3xgiMrQ=
 gopkg.in/go-playground/validator.v8 v8.18.2/go.mod h1:RX2a/7Ha8BgOhfk7j780h4/u/RRjR0eouCJSH80/M2Y=
-gopkg.in/go-playground/validator.v9 v9.29.1 h1:SvGtYmN60a5CVKTOzMSyfzWDeZRxRuGvRQyEAKbw1xc=
-gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
 gopkg.in/gomail.v2 v2.0.0-20150902115704-41f357289737 h1:NvePS/smRcFQ4bMtTddFtknbGCtoBkJxGmpSpVRafCc=
 gopkg.in/gomail.v2 v2.0.0-20150902115704-41f357289737/go.mod h1:LRQQ+SO6ZHR7tOkpBDuZnXENFzX8qRjMDMyPD6BRkCw=
+gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df h1:n7WqCuqOuCbNr617RXOY0AWRXxgwEyPp2z+p0+hgMuE=
+gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df/go.mod h1:LRQQ+SO6ZHR7tOkpBDuZnXENFzX8qRjMDMyPD6BRkCw=
+gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
+gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/russross/blackfriday.v2 v2.0.0 h1:+FlnIV8DSQnT7NZ43hcVKcdJdzZoeCmJj4Ql8gq5keA=
 gopkg.in/russross/blackfriday.v2 v2.0.0/go.mod h1:6sSBNz/GtOm/pJTuh5UmBK2ZHfmnxGbl2NZg1UliSOI=
@@ -405,6 +595,13 @@ gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bl
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
diff --git a/backend/main.go b/backend/main.go
index 458856c7..64d640d5 100644
--- a/backend/main.go
+++ b/backend/main.go
@@ -75,6 +75,12 @@ func main() {
 	log.Info("initialized log successfully")
 
 	if model.IsMaster() {
+		// 初始化Master节点信息
+		if err := services.InitMasterNodeInfo(); err != nil {
+			log.Error("init master node info error:" + err.Error())
+			debug.PrintStack()
+			panic(err)
+		}
 		// 初始化定时任务
 		if err := services.InitScheduler(); err != nil {
 			log.Error("init scheduler error:" + err.Error())
diff --git a/backend/model/node.go b/backend/model/node.go
index 715be30f..3bdbb5d1 100644
--- a/backend/model/node.go
+++ b/backend/model/node.go
@@ -26,7 +26,7 @@ type Node struct {
 	Key string `json:"key" bson:"key"`
 
 	// 前端展示
-	IsMaster bool `json:"is_master"`
+	IsMaster bool `json:"is_master" bson:"is_master"`
 
 	UpdateTs     time.Time `json:"update_ts" bson:"update_ts"`
 	CreateTs     time.Time `json:"create_ts" bson:"create_ts"`
@@ -43,64 +43,13 @@ func IsMaster() bool {
 }
 
 // 获取本机节点
-// TODO: 这里职责不单一，需要重构
 func GetCurrentNode() (Node, error) {
 	// 获得注册的key值
 	key, err := register.GetRegister().GetKey()
 	if err != nil {
 		return Node{}, err
 	}
-
-	// 从数据库中获取当前节点
-	var node Node
-	errNum := 0
-	for {
-		// 如果错误次数超过10次
-		if errNum >= 10 {
-			return node, errors.New("cannot get current node")
-		}
-
-		// 尝试获取节点
-		node, err = GetNodeByKey(key)
-		// 如果获取失败
-		if err != nil {
-			// 如果为主节点，表示为第一次注册，插入节点信息
-			// update: 增加具体错误过滤。防止加入多个master节点，后续需要职责拆分，
-			//只在master节点运行的时候才检测master节点的信息是否存在
-			if IsMaster() && err == mgo.ErrNotFound {
-				// 获取本机信息
-				ip, mac, hostname, key, err := GetNodeBaseInfo()
-				if err != nil {
-					debug.PrintStack()
-					return node, err
-				}
-
-				// 生成节点
-				node = Node{
-					Key:      key,
-					Id:       bson.NewObjectId(),
-					Ip:       ip,
-					Name:     key,
-					Mac:      mac,
-					Hostname: hostname,
-					IsMaster: true,
-				}
-				if err := node.Add(); err != nil {
-					return node, err
-				}
-				return node, nil
-			}
-			// 增加错误次数
-			errNum++
-
-			// 5秒后重试
-			time.Sleep(5 * time.Second)
-			continue
-		}
-		// 跳出循环
-		break
-	}
-	return node, nil
+	return GetNodeByKey(key)
 }
 
 func (n *Node) Save() error {
@@ -290,3 +239,33 @@ func ResetNodeStatusToOffline(list []string) {
 		}
 	}
 }
+
+func UpdateMasterNodeInfo(key string, ip string, mac string, hostname string) error {
+	s, c := database.GetCol("nodes")
+	defer s.Close()
+	c.UpdateAll(bson.M{
+		"is_master": true,
+	}, bson.M{
+		"is_master": false,
+	})
+	_, err := c.Upsert(bson.M{
+		"key": key,
+	}, bson.M{
+		"$set": bson.M{
+			"ip":             ip,
+			"port":           "8000",
+			"mac":            mac,
+			"hostname":       hostname,
+			"is_master":      true,
+			"update_ts":      time.Now(),
+			"update_ts_unix": time.Now().Unix(),
+		},
+		"$setOnInsert": bson.M{
+			"key":       key,
+			"name":      key,
+			"create_ts": time.Now(),
+			"_id":       bson.NewObjectId(),
+		},
+	})
+	return err
+}
diff --git a/backend/model/setting.go b/backend/model/setting.go
new file mode 100644
index 00000000..3b546f68
--- /dev/null
+++ b/backend/model/setting.go
@@ -0,0 +1,45 @@
+package model
+
+import (
+	"crawlab/database"
+	"github.com/globalsign/mgo/bson"
+	"time"
+)
+
+type Setting struct {
+	Keyword  string
+	Document bson.Raw
+}
+
+func GetRawSetting(keyword string, pointer interface{}) error {
+	s, col := database.GetCol("settings")
+	defer s.Close()
+	var setting Setting
+	err := col.Find(bson.M{"keyword": keyword}).One(&setting)
+	if err != nil {
+		return err
+	}
+	return setting.Document.Unmarshal(pointer)
+}
+
+type DocumentMeta struct {
+	DocumentVersion  int
+	DocStructVersion int
+	UpdateTime       time.Time
+	CreateTime       time.Time
+	DeleteTime       time.Time
+}
+
+//demo
+type SecuritySetting struct {
+	EnableRegister   bool
+	EnableInvitation bool
+	DocumentMeta     `bson:"inline" json:"inline"`
+}
+
+func GetSecuritySetting() (SecuritySetting, error) {
+	var app SecuritySetting
+	err := GetRawSetting("security", &app)
+	return app, err
+
+}
diff --git a/backend/services/local_node/local_node.go b/backend/services/local_node/local_node.go
new file mode 100644
index 00000000..849853de
--- /dev/null
+++ b/backend/services/local_node/local_node.go
@@ -0,0 +1,72 @@
+package local_node
+
+import (
+	"crawlab/model"
+	"github.com/apex/log"
+	"github.com/cenkalti/backoff/v4"
+	"go.uber.org/atomic"
+	"sync"
+	"time"
+)
+
+var localNode *LocalNode
+var locker atomic.Int32
+var once sync.Once
+
+type LocalNode struct {
+	node *model.Node
+	sync.RWMutex
+}
+
+func (n *LocalNode) load(retry bool) (err error) {
+	n.Lock()
+	defer n.Unlock()
+	var node model.Node
+	if retry {
+		b := backoff.NewConstantBackOff(1 * time.Second)
+		err = backoff.Retry(func() error {
+			node, err = model.GetCurrentNode()
+			if err != nil {
+				log.WithError(err).Warnf("Get current node info from database failed.  Will after %f seconds, try again.", b.NextBackOff().Seconds())
+			}
+			return err
+		}, b)
+	} else {
+		node, err = model.GetCurrentNode()
+	}
+
+	if err != nil {
+		return
+	}
+	n.node = &node
+	return nil
+}
+func (n *LocalNode) watch() {
+	timer := time.NewTicker(time.Second * 5)
+	for range timer.C {
+		if locker.CAS(0, 1) {
+
+			err := n.load(false)
+
+			if err != nil {
+				log.WithError(err).Errorf("load current node from database failed,")
+			}
+			locker.Store(0)
+		}
+		continue
+	}
+}
+
+func (n *LocalNode) Current() *model.Node {
+	n.RLock()
+	defer n.RUnlock()
+	return n.node
+}
+func CurrentNode() *model.Node {
+	once.Do(func() {
+		localNode = &LocalNode{}
+		_ = localNode.load(true)
+		go localNode.watch()
+	})
+	return localNode.Current()
+}
diff --git a/backend/services/node.go b/backend/services/node.go
index 89187a81..9257f007 100644
--- a/backend/services/node.go
+++ b/backend/services/node.go
@@ -6,13 +6,13 @@ import (
 	"crawlab/entity"
 	"crawlab/lib/cron"
 	"crawlab/model"
+	"crawlab/services/local_node"
 	"crawlab/services/msg_handler"
 	"crawlab/services/register"
 	"crawlab/utils"
 	"encoding/json"
 	"fmt"
 	"github.com/apex/log"
-	"github.com/globalsign/mgo"
 	"github.com/globalsign/mgo/bson"
 	"github.com/gomodule/redigo/redis"
 	"github.com/spf13/viper"
@@ -33,7 +33,8 @@ type Data struct {
 // 所有调用IsMasterNode的方法，都永远会在master节点执行，所以GetCurrentNode方法返回永远是master节点
 // 该ID的节点是否为主节点
 func IsMasterNode(id string) bool {
-	curNode, _ := model.GetCurrentNode()
+	curNode := local_node.CurrentNode()
+	//curNode, _ := model.GetCurrentNode()
 	node, _ := model.GetNode(bson.ObjectIdHex(id))
 	return curNode.Id == node.Id
 }
@@ -52,7 +53,6 @@ func GetNodeData() (Data, error) {
 	}
 	return data, err
 }
-
 func GetRedisNode(key string) (*Data, error) {
 	// 获取节点数据
 	value, err := database.RedisClient.HGet("nodes", key)
@@ -73,21 +73,22 @@ func GetRedisNode(key string) (*Data, error) {
 // 更新所有节点状态
 func UpdateNodeStatus() {
 	// 从Redis获取节点keys
-	list, err := database.RedisClient.HKeys("nodes")
+	list, err := database.RedisClient.HScan("nodes")
 	if err != nil {
 		log.Errorf("get redis node keys error: %s", err.Error())
 		return
 	}
-
+	var offlineKeys []string
 	// 遍历节点keys
-	for _, key := range list {
-
-		data, err := GetRedisNode(key)
-		if err != nil {
+	for _, dataStr := range list {
+		var data Data
+		if err := json.Unmarshal([]byte(dataStr), &data); err != nil {
+			log.Errorf(err.Error())
 			continue
 		}
 		// 如果记录的更新时间超过60秒，该节点被认为离线
 		if time.Now().Unix()-data.UpdateTsUnix > 60 {
+			offlineKeys = append(offlineKeys, data.Key)
 			// 在Redis中删除该节点
 			if err := database.RedisClient.HDel("nodes", data.Key); err != nil {
 				log.Errorf("delete redis node key error:%s, key:%s", err.Error(), data.Key)
@@ -96,13 +97,29 @@ func UpdateNodeStatus() {
 		}
 
 		// 处理node信息
-		handleNodeInfo(key, data)
+		if err = UpdateNodeInfo(&data); err != nil {
+			log.Errorf(err.Error())
+			continue
+		}
+	}
+	if len(offlineKeys) > 0 {
+		s, c := database.GetCol("nodes")
+		defer s.Close()
+		_, err = c.UpdateAll(bson.M{
+			"key": bson.M{
+				"$in": offlineKeys,
+			},
+		}, bson.M{
+			"$set": bson.M{
+				"status":         constants.StatusOffline,
+				"update_ts":      time.Now(),
+				"update_ts_unix": time.Now().Unix(),
+			},
+		})
+		if err != nil {
+			log.Errorf(err.Error())
+		}
 	}
-
-	// 重新获取list
-	list, _ = database.RedisClient.HKeys("nodes")
-	// 重置不在redis的key为offline
-	model.ResetNodeStatusToOffline(list)
 }
 
 func getNodeName(data *Data) string {
@@ -119,46 +136,28 @@ func getNodeName(data *Data) string {
 }
 
 // 处理节点信息
-func handleNodeInfo(key string, data *Data) {
-	// 添加同步锁
-	v, err := database.RedisClient.Lock(key)
-	if err != nil {
-		return
-	}
-	defer database.RedisClient.UnLock(key, v)
-
+func UpdateNodeInfo(data *Data) (err error) {
 	// 更新节点信息到数据库
 	s, c := database.GetCol("nodes")
 	defer s.Close()
 
-	var node model.Node
-	if err := c.Find(bson.M{"key": key}).One(&node); err != nil && err == mgo.ErrNotFound {
-		// 数据库不存在该节点
-		node = model.Node{
-			Key:          key,
-			Name:         getNodeName(data),
-			Ip:           data.Ip,
-			Port:         "8000",
-			Mac:          data.Mac,
-			Status:       constants.StatusOnline,
-			IsMaster:     data.Master,
-			UpdateTs:     time.Now(),
-			UpdateTsUnix: time.Now().Unix(),
-		}
-		if err := node.Add(); err != nil {
-			log.Errorf(err.Error())
-			return
-		}
-	} else if node.Key != "" {
-		// 数据库存在该节点
-		node.Status = constants.StatusOnline
-		node.UpdateTs = time.Now()
-		node.UpdateTsUnix = time.Now().Unix()
-		if err := node.Save(); err != nil {
-			log.Errorf(err.Error())
-			return
-		}
-	}
+	_, err = c.Upsert(bson.M{"key": data.Key}, bson.M{
+		"$set": bson.M{
+			"status":         constants.StatusOnline,
+			"update_ts":      time.Now(),
+			"update_ts_unix": time.Now().Unix(),
+		},
+		"$setOnInsert": bson.M{
+			"_id":       bson.NewObjectId(),
+			"key":       data.Key,
+			"name":      getNodeName(data),
+			"ip":        data.Ip,
+			"port":      "8000",
+			"mac":       data.Mac,
+			"is_master": data.Master,
+		},
+	})
+	return err
 }
 
 // 更新节点数据
@@ -268,11 +267,13 @@ func InitNodeService() error {
 	UpdateNodeData()
 
 	// 获取当前节点
-	node, err := model.GetCurrentNode()
-	if err != nil {
-		log.Errorf(err.Error())
-		return err
-	}
+	//node, err := model.GetCurrentNode()
+	//
+	//if err != nil {
+	//	log.Errorf(err.Error())
+	//	return err
+	//}
+	node := local_node.CurrentNode()
 
 	if model.IsMaster() {
 		// 如果为主节点，订阅主节点通信频道
@@ -310,3 +311,12 @@ func InitNodeService() error {
 	c.Start()
 	return nil
 }
+func InitMasterNodeInfo() (err error) {
+	// 获取本机信息
+	ip, mac, hostname, key, err := model.GetNodeBaseInfo()
+	if err != nil {
+		debug.PrintStack()
+		return err
+	}
+	return model.UpdateMasterNodeInfo(key, ip, mac, hostname)
+}
diff --git a/backend/services/rpc/base.go b/backend/services/rpc/base.go
index ea4c7a62..60d2151a 100644
--- a/backend/services/rpc/base.go
+++ b/backend/services/rpc/base.go
@@ -5,11 +5,13 @@ import (
 	"crawlab/database"
 	"crawlab/entity"
 	"crawlab/model"
+	"crawlab/services/local_node"
 	"crawlab/utils"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"github.com/apex/log"
+	"github.com/cenkalti/backoff/v4"
 	"github.com/gomodule/redigo/redis"
 	uuid "github.com/satori/go.uuid"
 	"runtime/debug"
@@ -77,7 +79,7 @@ func GetService(msg entity.RpcMessage) Service {
 }
 
 // 处理RPC消息
-func handleMsg(msgStr string, node model.Node) {
+func handleMsg(msgStr string, node *model.Node) {
 	// 反序列化消息
 	var msg entity.RpcMessage
 	if err := json.Unmarshal([]byte(msgStr), &msg); err != nil {
@@ -107,23 +109,29 @@ func InitRpcService() error {
 	go func() {
 		for {
 			// 获取当前节点
-			node, err := model.GetCurrentNode()
-			if err != nil {
-				log.Errorf(err.Error())
-				debug.PrintStack()
-				continue
-			}
+			node := local_node.CurrentNode()
+			//node, err := model.GetCurrentNode()
+			//if err != nil {
+			//	log.Errorf(err.Error())
+			//	debug.PrintStack()
+			//	continue
+			//}
+			b := backoff.NewExponentialBackOff()
+			bp := backoff.WithMaxRetries(b, 10)
+			var msgStr string
+			var err error
+			err = backoff.Retry(func() error {
+				msgStr, err = database.RedisClient.BRPop(fmt.Sprintf("rpc:%s", node.Id.Hex()), 0)
 
-			// 获取获取消息队列信息
-			msgStr, err := database.RedisClient.BRPop(fmt.Sprintf("rpc:%s", node.Id.Hex()), 0)
-			if err != nil {
-				if err != redis.ErrNil {
-					log.Errorf(err.Error())
-					debug.PrintStack()
+				if err != nil && err != redis.ErrNil {
+					log.WithError(err).Warnf("waiting for redis pool active connection. will after %f seconds try  again.", b.NextBackOff().Seconds())
+					return err
 				}
+				return err
+			}, bp)
+			if err != nil && err != redis.ErrNil {
 				continue
 			}
-
 			// 处理消息
 			go handleMsg(msgStr, node)
 		}
diff --git a/backend/services/spider_handler/spider.go b/backend/services/spider_handler/spider.go
index 08934f2f..389ea6cd 100644
--- a/backend/services/spider_handler/spider.go
+++ b/backend/services/spider_handler/spider.go
@@ -4,6 +4,7 @@ import (
 	"crawlab/constants"
 	"crawlab/database"
 	"crawlab/model"
+	"crawlab/services/local_node"
 	"crawlab/utils"
 	"fmt"
 	"github.com/apex/log"
@@ -76,7 +77,9 @@ func (s *SpiderSync) RemoveDownCreate(md5 string) {
 
 // 获得下载锁的key
 func (s *SpiderSync) GetLockDownloadKey(spiderId string) string {
-	node, _ := model.GetCurrentNode()
+	//node, _ := model.GetCurrentNode()
+	node := local_node.CurrentNode()
+
 	return node.Id.Hex() + "#" + spiderId
 }
 
diff --git a/backend/services/task.go b/backend/services/task.go
index 4a4cc1fb..15b9d2bb 100644
--- a/backend/services/task.go
+++ b/backend/services/task.go
@@ -7,6 +7,7 @@ import (
 	"crawlab/entity"
 	"crawlab/lib/cron"
 	"crawlab/model"
+	"crawlab/services/local_node"
 	"crawlab/services/notification"
 	"crawlab/services/spider_handler"
 	"crawlab/utils"
@@ -503,18 +504,20 @@ func ExecuteTask(id int) {
 	tic := time.Now()
 
 	// 获取当前节点
-	node, err := model.GetCurrentNode()
-	if err != nil {
-		log.Errorf("execute task get current node error: %s", err.Error())
-		debug.PrintStack()
-		return
-	}
+	//node, err := model.GetCurrentNode()
+	//if err != nil {
+	//	log.Errorf("execute task get current node error: %s", err.Error())
+	//	debug.PrintStack()
+	//	return
+	//}
+	node := local_node.CurrentNode()
 
 	// 节点队列
 	queueCur := "tasks:node:" + node.Id.Hex()
 
 	// 节点队列任务
 	var msg string
+	var err error
 	if msg, err = database.RedisClient.LPop(queueCur); err != nil {
 		// 节点队列没有任务，获取公共队列任务
 		queuePub := "tasks:public"
@@ -765,12 +768,13 @@ func CancelTask(id string) (err error) {
 	}
 
 	// 获取当前节点（默认当前节点为主节点）
-	node, err := model.GetCurrentNode()
-	if err != nil {
-		log.Errorf("get current node error: %s", err.Error())
-		debug.PrintStack()
-		return err
-	}
+	//node, err := model.GetCurrentNode()
+	//if err != nil {
+	//	log.Errorf("get current node error: %s", err.Error())
+	//	debug.PrintStack()
+	//	return err
+	//}
+	node := local_node.CurrentNode()
 
 	log.Infof("current node id is: %s", node.Id.Hex())
 	log.Infof("task node id is: %s", task.NodeId.Hex())