diff --git a/pkg/common/db/localcache/conversation.go b/pkg/common/db/localcache/conversation.go
index d991fa5a0..5d2e11f30 100644
--- a/pkg/common/db/localcache/conversation.go
+++ b/pkg/common/db/localcache/conversation.go
@@ -11,6 +11,7 @@ import (
 
 type ConversationLocalCacheInterface interface {
 	GetRecvMsgNotNotifyUserIDs(ctx context.Context, groupID string) ([]string, error)
+	GetConversationIDs(ctx context.Context, userID string) ([]string, error)
 }
 
 type ConversationLocalCache struct {
@@ -40,3 +41,18 @@ func (g *ConversationLocalCache) GetRecvMsgNotNotifyUserIDs(ctx context.Context,
 	}
 	return resp.UserIDs, nil
 }
+
+func (g *ConversationLocalCache) GetConversationIDs(ctx context.Context, userID string) ([]string, error) {
+	conn, err := g.client.GetConn(ctx, config.Config.RpcRegisterName.OpenImConversationName)
+	if err != nil {
+		return nil, err
+	}
+	client := conversation.NewConversationClient(conn)
+	resp, err := client.GetConversationIDs(ctx, &conversation.GetConversationIDsReq{
+		UserID: userID,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return resp.ConversationIDs, nil
+}
diff --git a/pkg/common/db/localcache/group.go b/pkg/common/db/localcache/group.go
index 38cead1a6..5b3bdbd2d 100644
--- a/pkg/common/db/localcache/group.go
+++ b/pkg/common/db/localcache/group.go
@@ -46,7 +46,7 @@ func (g *GroupLocalCache) GetGroupMemberIDs(ctx context.Context, groupID string)
 	if err != nil {
 		return nil, err
 	}
-	if len(resp.GroupAbstractInfos) < 0 {
+	if len(resp.GroupAbstractInfos) < 1 {
 		return nil, errs.ErrGroupIDNotFound
 	}
 	localHashInfo, ok := g.cache[groupID]
diff --git a/pkg/common/db/unrelation/mongo.go b/pkg/common/db/unrelation/mongo.go
index a61af1a81..4491d9d9b 100644
--- a/pkg/common/db/unrelation/mongo.go
+++ b/pkg/common/db/unrelation/mongo.go
@@ -3,6 +3,9 @@ package unrelation
 import (
 	"context"
 	"fmt"
+	"strings"
+	"time"
+
 	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/config"
 	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/db/table/unrelation"
 	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/mw/specialerror"
@@ -11,8 +14,6 @@ import (
 	"go.mongodb.org/mongo-driver/mongo"
 	"go.mongodb.org/mongo-driver/mongo/options"
 	"go.mongodb.org/mongo-driver/x/bsonx"
-	"strings"
-	"time"
 )
 
 type Mongo struct {
diff --git a/pkg/common/db/unrelation/msg.go b/pkg/common/db/unrelation/msg.go
index 344fd26a8..63eff5b0d 100644
--- a/pkg/common/db/unrelation/msg.go
+++ b/pkg/common/db/unrelation/msg.go
@@ -144,7 +144,6 @@ func (m *MsgMongoDriver) GetMsgBySeqIndexIn1Doc(ctx context.Context, docID strin
 		bson.M{
 			"$project": bson.M{
 				"msgs": bson.M{
-					// "$slice": []interface{}{"$msgs", beginIndex, num},
 					"$slice": bson.A{"$msgs", beginIndex, num},
 				},
 			},
@@ -154,16 +153,23 @@ func (m *MsgMongoDriver) GetMsgBySeqIndexIn1Doc(ctx context.Context, docID strin
 	if err != nil {
 		return nil, nil, errs.Wrap(err)
 	}
-	log.ZDebug(ctx, "info", "beginIndex", beginIndex, "num", num)
-	var msgInfos []*table.MsgInfoModel
-	if err := cursor.All(ctx, &msgInfos); err != nil {
-		return nil, nil, err
+	defer cursor.Close(ctx)
+	var doc table.MsgDocModel
+	i := 0
+	for cursor.Next(ctx) {
+		err := cursor.Decode(&doc)
+		if err != nil {
+			return nil, nil, err
+		}
+		if i == 0 {
+			break
+		}
 	}
-	if len(msgInfos) < 1 {
+	if len(doc.Msg) < 1 {
 		return nil, nil, errs.ErrRecordNotFound.Wrap("mongo GetMsgBySeqIndex failed, len is 0")
 	}
-	log.ZDebug(ctx, "msgInfos", "num", len(msgInfos))
-	for _, v := range msgInfos {
+	log.ZDebug(ctx, "msgInfos", "num", len(doc.Msg))
+	for _, v := range doc.Msg {
 		var msg sdkws.MsgData
 		if err := proto.Unmarshal(v.Msg, &msg); err != nil {
 			return nil, nil, err