diff --git a/src/logservice/restoreservice/ob_log_restore_handler.cpp b/src/logservice/restoreservice/ob_log_restore_handler.cpp
index 46474e2337..06ab4d5c02 100644
--- a/src/logservice/restoreservice/ob_log_restore_handler.cpp
+++ b/src/logservice/restoreservice/ob_log_restore_handler.cpp
@@ -781,12 +781,12 @@ int ObLogRestoreHandler::check_restore_to_newest_from_service_(
     } else if (OB_FAIL(proxy_util.get_tenant_info(tenant_role, tenant_status))) {
       CLOG_LOG(WARN, "get tenant info failed", K(id_), K(service_attr));
     } else if (! tenant_role.is_standby() || share::schema::ObTenantStatus::TENANT_STATUS_NORMAL != tenant_status) {
-      ret = OB_EAGAIN;  // TODO 错误码
+      ret = OB_SOURCE_TENANT_STATE_NOT_MATCH;
       CLOG_LOG(WARN, "tenant role or status not match", K(id_), K(tenant_role), K(tenant_status), K(service_attr));
     } else if (OB_FAIL(proxy_util.get_max_log_info(share::ObLSID(id_), access_mode, archive_scn))) {
       CLOG_LOG(WARN, "get max_log info failed", K(id_));
     } else if (!palf::is_valid_access_mode(access_mode) || palf::AccessMode::RAW_WRITE != access_mode) {
-      ret = OB_EAGAIN;   // TODO 错误码
+      ret = OB_SOURCE_LS_STATE_NOT_MATCH;
       CLOG_LOG(WARN, "access_mode not match", K(id_), K(access_mode));
     } else if (end_scn < archive_scn) {
       CLOG_LOG(INFO, "end_scn smaller than archive_scn", K(id_), K(archive_scn), K(end_scn));
diff --git a/src/logservice/restoreservice/ob_log_restore_handler.h b/src/logservice/restoreservice/ob_log_restore_handler.h
index db86ca4371..73d10cfe7a 100644
--- a/src/logservice/restoreservice/ob_log_restore_handler.h
+++ b/src/logservice/restoreservice/ob_log_restore_handler.h
@@ -212,6 +212,11 @@ public:
   // 2. for standby based on net service, check the max log in primary is restored in the standby
   // @param[out] end_scn, the end_scn of palf
   // @param[out] archive_scn, the max scn in archive logs
+  // @ret_code OB_NOT_MASTER   the restore_handler is not master
+  //           OB_EAGAIN       the restore source not valid
+  //           OB_SOURCE_TENANT_STATE_NOT_MATCH     original tenant state not match to switchover
+  //           OB_SOURCE_LS_STATE_NOT_MATCH         original ls state not match to switchover
+  //           other code      unexpected ret_code
   int check_restore_to_newest(share::SCN &end_scn, share::SCN &archive_scn);
   // @brief Remote Fetch Log Workers fetch log from remote source in parallel, but raw write to palf in series
   // This interface to to sort and cache logs