diff --git a/mittest/simple_server/test_ob_black_list_service.cpp b/mittest/simple_server/test_ob_black_list_service.cpp
index 219af97a5b..0e9eb6c807 100644
--- a/mittest/simple_server/test_ob_black_list_service.cpp
+++ b/mittest/simple_server/test_ob_black_list_service.cpp
@@ -65,8 +65,7 @@ TEST_F(TestObBlackListService, black_list_inner_func)
     }
 
     // get max_stale_time_for_weak_consistency
-    uint64_t max_stale_time = 0;
-    ASSERT_EQ(OB_SUCCESS, bl_service.get_tenant_max_stale_time_(bl_key.get_tenant_id(), max_stale_time));
+    int64_t max_stale_time = bl_service.get_tenant_max_stale_time_(bl_key.get_tenant_id());
     LOG_INFO("get_tenant_max_stale_time_ ", K(bl_key), K(max_stale_time));
 
     // do blacklist check
diff --git a/src/storage/tx/wrs/ob_black_list.cpp b/src/storage/tx/wrs/ob_black_list.cpp
index dc274a1a59..8b6ec8984d 100644
--- a/src/storage/tx/wrs/ob_black_list.cpp
+++ b/src/storage/tx/wrs/ob_black_list.cpp
@@ -234,8 +234,8 @@ void ObBLService::do_thread_task_(const int64_t begin_tstamp,
 int ObBLService::do_black_list_check_(sqlclient::ObMySQLResult *result)
 {
   int ret = OB_SUCCESS;
-  uint64_t max_stale_time = 0;
-  uint64_t curr_time_ns = static_cast<uint64_t>(ObTimeUtility::current_time_ns());
+  int64_t max_stale_time = 0;
+  int64_t curr_time_ns = ObTimeUtility::current_time_ns();
 
   while (OB_SUCC(result->next())) {
     ObBLKey bl_key;
@@ -244,10 +244,9 @@ int ObBLService::do_black_list_check_(sqlclient::ObMySQLResult *result)
       TRANS_LOG(WARN, "get_info_from_result_ fail ", KR(ret), K(result));
     } else if (LEADER == ls_info.ls_state_) {
       // 该日志流是leader，不能加入黑名单
-    } else if (OB_FAIL(get_tenant_max_stale_time_(bl_key.get_tenant_id(), max_stale_time))) {
-      TRANS_LOG(WARN, "get_tenant_max_stale_time_ fail ", KR(ret), K(bl_key));
     } else {
-      uint64_t max_stale_time_ns = max_stale_time * 1000;
+      max_stale_time = get_tenant_max_stale_time_(bl_key.get_tenant_id());
+      int64_t max_stale_time_ns = max_stale_time * 1000;
       if (curr_time_ns > ls_info.weak_read_scn_ + max_stale_time_ns) {
         // 时间戳落后，将对应日志流加入黑名单
         if (OB_FAIL(ls_bl_mgr_.update(bl_key, ls_info))) {
@@ -289,7 +288,7 @@ int ObBLService::get_info_from_result_(sqlclient::ObMySQLResult &result, ObBLKey
   int64_t tenant_id = 0;
   int64_t id = ObLSID::INVALID_LS_ID;
   ObString ls_state_str;
-  uint64_t weak_read_scn = 0;
+  uint64_t weak_read_scn_uint = 0;
   int64_t migrate_status_int = -1;
 
   (void)GET_COL_IGNORE_NULL(result.get_varchar, "svr_ip", ip);
@@ -297,12 +296,13 @@ int ObBLService::get_info_from_result_(sqlclient::ObMySQLResult &result, ObBLKey
   (void)GET_COL_IGNORE_NULL(result.get_int, "tenant_id", tenant_id);
   (void)GET_COL_IGNORE_NULL(result.get_int, "ls_id", id);
   (void)GET_COL_IGNORE_NULL(result.get_varchar, "ls_state", ls_state_str);
-  (void)GET_COL_IGNORE_NULL(result.get_uint, "weak_read_scn", weak_read_scn);
+  (void)GET_COL_IGNORE_NULL(result.get_uint, "weak_read_scn", weak_read_scn_uint);
   (void)GET_COL_IGNORE_NULL(result.get_int, "migrate_status", migrate_status_int);
 
   ObLSID ls_id(id);
   common::ObAddr server;
   ObRole ls_state = INVALID_ROLE;
+  int64_t weak_read_scn = static_cast<int64_t>(weak_read_scn_uint);
   ObMigrateStatus migrate_status = ObMigrateStatus(migrate_status_int);
 
   if (false == server.set_ip_addr(ip, static_cast<uint32_t>(port))) {
@@ -319,18 +319,9 @@ int ObBLService::get_info_from_result_(sqlclient::ObMySQLResult &result, ObBLKey
   return ret;
 }
 
-int ObBLService::get_tenant_max_stale_time_(uint64_t tenant_id, uint64_t &max_stale_time)
+int64_t ObBLService::get_tenant_max_stale_time_(uint64_t tenant_id)
 {
-  int ret = OB_SUCCESS;
-  int64_t max_stale_time_int = ObWeakReadUtil::max_stale_time_for_weak_consistency(tenant_id,
-    ObWeakReadUtil::IGNORE_TENANT_EXIST_WARN);
-  if (max_stale_time_int <= 0) {
-    ret = OB_ERR_UNEXPECTED;
-    max_stale_time = 0;
-  } else {
-    max_stale_time = static_cast<uint64_t>(max_stale_time_int);
-  }
-  return ret;
+  return ObWeakReadUtil::max_stale_time_for_weak_consistency(tenant_id, ObWeakReadUtil::IGNORE_TENANT_EXIST_WARN);
 }
 
 void ObBLService::print_stat_()
diff --git a/src/storage/tx/wrs/ob_black_list.h b/src/storage/tx/wrs/ob_black_list.h
index c80d68d55a..57b550164e 100644
--- a/src/storage/tx/wrs/ob_black_list.h
+++ b/src/storage/tx/wrs/ob_black_list.h
@@ -123,7 +123,7 @@ public:
       weak_read_scn_(0),
       migrate_status_(OB_MIGRATE_STATUS_MAX)
       {}
-  int init(ObRole ls_state, uint64_t weak_read_scn, ObMigrateStatus migrate_status)
+  int init(ObRole ls_state, int64_t weak_read_scn, ObMigrateStatus migrate_status)
   {
     int ret = OB_SUCCESS;
     if (OB_MIGRATE_STATUS_MAX == migrate_status) {
@@ -144,7 +144,7 @@ public:
   // 日志流状态（角色）：LEADER、FOLLOWER，其他角色对于日志流是没有意义的
   ObRole ls_state_;
   // 弱读时间戳，如果落后超过一定时间就要加入黑名单，单位ns
-  uint64_t weak_read_scn_;
+  int64_t weak_read_scn_;
   // 迁移状态，正在迁移的日志流一定不可读
   ObMigrateStatus migrate_status_;
 };
@@ -367,7 +367,7 @@ private:
   int do_black_list_check_(sqlclient::ObMySQLResult *result);
   int do_clean_up_();
   int get_info_from_result_(sqlclient::ObMySQLResult &result, ObBLKey &bl_key, ObLsInfo &ls_info);
-  int get_tenant_max_stale_time_(uint64_t tenant_id, uint64_t &max_stale_time);
+  int64_t get_tenant_max_stale_time_(uint64_t tenant_id);
   void print_stat_();
 
 private: