diff --git a/src/rootserver/mview/ob_mlog_maintenance_task.cpp b/src/rootserver/mview/ob_mlog_maintenance_task.cpp
index e0a099932d..5b0f10d4a6 100644
--- a/src/rootserver/mview/ob_mlog_maintenance_task.cpp
+++ b/src/rootserver/mview/ob_mlog_maintenance_task.cpp
@@ -38,6 +38,7 @@ ObMLogMaintenanceTask::ObMLogMaintenanceTask()
     start_time_(-1),
     start_gc_mlog_time_(-1),
     cost_us_(-1),
+    prepare_cost_us_(-1),
     gc_mlog_cost_us_(-1),
     fetch_finish_(false),
     in_sched_(false),
diff --git a/src/rootserver/mview/ob_mview_maintenance_task.cpp b/src/rootserver/mview/ob_mview_maintenance_task.cpp
index 9c7d93e075..5f264da2da 100644
--- a/src/rootserver/mview/ob_mview_maintenance_task.cpp
+++ b/src/rootserver/mview/ob_mview_maintenance_task.cpp
@@ -43,6 +43,7 @@ ObMViewMaintenanceTask::ObMViewMaintenanceTask()
     start_time_(-1),
     start_gc_mview_time_(-1),
     cost_us_(-1),
+    prepare_cost_us_(-1),
     gc_mview_cost_us_(-1),
     fetch_finish_(false),
     in_sched_(false),