diff --git a/internal/cron_task/clear_msg.go b/internal/cron_task/clear_msg.go
index 3c43e3e20..078eee136 100644
--- a/internal/cron_task/clear_msg.go
+++ b/internal/cron_task/clear_msg.go
@@ -7,6 +7,7 @@ import (
 	"Open_IM/pkg/common/log"
 	server_api_params "Open_IM/pkg/proto/sdk_ws"
 	"Open_IM/pkg/utils"
+	goRedis "github.com/go-redis/redis/v8"
 	"github.com/golang/protobuf/proto"
 	"math"
 )
@@ -21,10 +22,13 @@ func ResetUserGroupMinSeq(operationID, groupID string, userIDList []string) erro
 		log.NewError(operationID, utils.GetSelfFuncName(), groupID, "deleteMongoMsg failed")
 		return utils.Wrap(err, "")
 	}
+	if minSeq == 0 {
+		return nil
+	}
 	log.NewDebug(operationID, utils.GetSelfFuncName(), "delMsgIDList:", delMsgIDList, "minSeq", minSeq)
 	for _, userID := range userIDList {
 		userMinSeq, err := db.DB.GetGroupUserMinSeq(groupID, userID)
-		if err != nil {
+		if err != nil && err != goRedis.Nil {
 			log.NewError(operationID, utils.GetSelfFuncName(), "GetGroupUserMinSeq failed", groupID, userID, err.Error())
 			continue
 		}
@@ -46,6 +50,9 @@ func DeleteMongoMsgAndResetRedisSeq(operationID, userID string) error {
 	if err != nil {
 		return utils.Wrap(err, "")
 	}
+	if minSeq == 0 {
+		return nil
+	}
 	log.NewDebug(operationID, utils.GetSelfFuncName(), "delMsgIDMap: ", delMsgIDList, "minSeq", minSeq)
 	err = db.DB.SetUserMinSeq(userID, minSeq)
 	return err
@@ -136,6 +143,9 @@ func checkMaxSeqWithMongo(operationID, ID string, diffusionType int) error {
 		maxSeq, err = db.DB.GetGroupMaxSeq(ID)
 	}
 	if err != nil {
+		if err == goRedis.Nil {
+			return nil
+		}
 		return utils.Wrap(err, "GetUserMaxSeq failed")
 	}
 	msg, err := db.DB.GetNewestMsg(ID)
diff --git a/internal/cron_task/cron_task.go b/internal/cron_task/cron_task.go
index 0b1784b20..a7f90cf91 100644
--- a/internal/cron_task/cron_task.go
+++ b/internal/cron_task/cron_task.go
@@ -20,7 +20,7 @@ func StartCronTask() {
 	fmt.Println("config", config.Config.Mongo.ChatRecordsClearTime)
 	_, err := c.AddFunc(config.Config.Mongo.ChatRecordsClearTime, func() {
 		operationID := getCronTaskOperationID()
-		log.NewInfo(operationID, "start", utils.GetSelfFuncName())
+		log.NewInfo(operationID, "====================== start del cron task ======================")
 		userIDList, err := im_mysql_model.SelectAllUserID()
 		if err == nil {
 			log.NewDebug(operationID, utils.GetSelfFuncName(), "userIDList: ", userIDList)
@@ -56,6 +56,8 @@ func StartCronTask() {
 			log.NewError(operationID, utils.GetSelfFuncName(), err.Error())
 			return
 		}
+
+		log.NewInfo(operationID, "====================== start del cron finished ======================")
 	})
 	if err != nil {
 		fmt.Println("start cron failed", err.Error())
diff --git a/pkg/common/db/mongoModel.go b/pkg/common/db/mongoModel.go
index 47b556b36..4953aaabc 100644
--- a/pkg/common/db/mongoModel.go
+++ b/pkg/common/db/mongoModel.go
@@ -263,13 +263,16 @@ func (d *DataBases) GetUserMsgListByIndex(ID string, index int64) (*UserChat, er
 	ctx, _ := context.WithTimeout(context.Background(), time.Duration(config.Config.Mongo.DBTimeout)*time.Second)
 	c := d.mongoClient.Database(config.Config.Mongo.DBDatabase).Collection(cChat)
 	regex := fmt.Sprintf("^%s", ID)
-	findOpts := options.Find().SetLimit(1).SetSkip(index).SetSort(bson.M{"$regex": regex}).SetSort(bson.M{"uid": 1})
+	findOpts := options.Find().SetLimit(1).SetSkip(index).SetSort(bson.M{"uid": 1})
 	var msgs []UserChat
 	cursor, err := c.Find(ctx, bson.M{"uid": bson.M{"$regex": regex}}, findOpts)
 	if err != nil {
 		return nil, err
 	}
 	err = cursor.Decode(&msgs)
+	if err != nil {
+		return nil, utils.Wrap(err, "")
+	}
 	if len(msgs) > 0 {
 		return &msgs[0], err
 	} else {
@@ -306,13 +309,16 @@ func (d *DataBases) GetNewestMsg(ID string) (msg *MsgInfo, err error) {
 	ctx, _ := context.WithTimeout(context.Background(), time.Duration(config.Config.Mongo.DBTimeout)*time.Second)
 	c := d.mongoClient.Database(config.Config.Mongo.DBDatabase).Collection(cChat)
 	regex := fmt.Sprintf("^%s", ID)
-	findOpts := options.Find().SetLimit(1).SetSort(bson.M{"$regex": regex}).SetSort(bson.M{"uid": -1})
+	findOpts := options.Find().SetLimit(1).SetSort(bson.M{"uid": -1})
 	var userChats []UserChat
 	cursor, err := c.Find(ctx, bson.M{"uid": bson.M{"$regex": regex}}, findOpts)
 	if err != nil {
 		return nil, err
 	}
 	err = cursor.Decode(&userChats)
+	if err != nil {
+		return nil, utils.Wrap(err, "")
+	}
 	if len(userChats) > 0 {
 		if len(userChats[0].Msg) > 0 {
 			return &userChats[0].Msg[len(userChats[0].Msg)], nil