diff --git a/internal/pkg/core/device_handler.go b/internal/pkg/core/device_handler.go
index 7304b9a..1390e1d 100644
--- a/internal/pkg/core/device_handler.go
+++ b/internal/pkg/core/device_handler.go
@@ -981,7 +981,9 @@
 
 func (dh *DeviceHandler) activateONU(ctx context.Context, intfID uint32, onuID int64, serialNum *oop.SerialNumber, serialNumber string) error {
 	logger.Debugw("activate-onu", log.Fields{"intfID": intfID, "onuID": onuID, "serialNum": serialNum, "serialNumber": serialNumber})
-	dh.flowMgr.UpdateOnuInfo(ctx, intfID, uint32(onuID), serialNumber)
+	if err := dh.flowMgr.UpdateOnuInfo(ctx, intfID, uint32(onuID), serialNumber); err != nil {
+		return olterrors.NewErrAdapter("onu-activate-failed", log.Fields{"onu": onuID, "intfID": intfID}, err)
+	}
 	// TODO: need resource manager
 	var pir uint32 = 1000000
 	Onu := oop.Onu{IntfId: intfID, OnuId: uint32(onuID), SerialNumber: serialNum, Pir: pir}
diff --git a/internal/pkg/core/openolt_flowmgr.go b/internal/pkg/core/openolt_flowmgr.go
index 451485f..3522ebd 100644
--- a/internal/pkg/core/openolt_flowmgr.go
+++ b/internal/pkg/core/openolt_flowmgr.go
@@ -2218,18 +2218,17 @@
 }
 
 //UpdateOnuInfo function adds onu info to cache and kvstore
-func (f *OpenOltFlowMgr) UpdateOnuInfo(ctx context.Context, intfID uint32, onuID uint32, serialNum string) {
+func (f *OpenOltFlowMgr) UpdateOnuInfo(ctx context.Context, intfID uint32, onuID uint32, serialNum string) error {
 
 	f.lockCache.Lock()
 	defer f.lockCache.Unlock()
 	onu := rsrcMgr.OnuGemInfo{OnuID: onuID, SerialNumber: serialNum, IntfID: intfID}
 	f.onuGemInfo[intfID] = append(f.onuGemInfo[intfID], onu)
 	if err := f.resourceMgr.AddOnuGemInfo(ctx, intfID, onu); err != nil {
-		// TODO: VOL-2638
-		logger.Errorw("failed to add onu info", log.Fields{"onu": onu})
-		return
+		return err
 	}
 	logger.Debugw("Updated onuinfo", log.Fields{"intfID": intfID, "onuID": onuID, "serialNum": serialNum})
+	return nil
 }
 
 //addGemPortToOnuInfoMap function adds GEMport to ONU map
diff --git a/internal/pkg/resourcemanager/resourcemanager.go b/internal/pkg/resourcemanager/resourcemanager.go
index 1db98b9..d3a9789 100755
--- a/internal/pkg/resourcemanager/resourcemanager.go
+++ b/internal/pkg/resourcemanager/resourcemanager.go
@@ -22,6 +22,7 @@
 	"encoding/json"
 	"errors"
 	"fmt"
+	"github.com/opencord/voltha-openolt-adapter/internal/pkg/olterrors"
 	"strconv"
 	"strings"
 
@@ -1037,17 +1038,19 @@
 
 	if err = RsrcMgr.ResourceMgrs[IntfID].GetOnuGemInfo(ctx, IntfID, &onuGemData); err != nil {
 		logger.Errorf("failed to get onuifo for intfid %d", IntfID)
-		return err
+		return olterrors.NewErrPersistence("get", "OnuGemInfo", IntfID,
+			log.Fields{"onuGem": onuGem, "intfID": IntfID}, err)
 	}
 	onuGemData = append(onuGemData, onuGem)
 	err = RsrcMgr.ResourceMgrs[IntfID].AddOnuGemInfo(ctx, IntfID, onuGemData)
 	if err != nil {
 		logger.Error("Failed to add onugem to kv store")
-		return err
+		return olterrors.NewErrPersistence("set", "OnuGemInfo", IntfID,
+			log.Fields{"onuGemData": onuGemData, "intfID": IntfID}, err)
 	}
 
 	logger.Debugw("added onu to onugeminfo", log.Fields{"intf": IntfID, "onugem": onuGem})
-	return err
+	return nil
 }
 
 // UpdateOnuGemInfo updates Onuinfo on the kvstore per interface