diff --git a/pkg/ddl/table.go b/pkg/ddl/table.go
index 63523481509dd..f61775834ef3e 100644
--- a/pkg/ddl/table.go
+++ b/pkg/ddl/table.go
@@ -239,8 +239,8 @@ func onCreateTables(d *ddlCtx, t *meta.Meta, job *model.Job) (int64, error) {
 	// We don't construct jobs for every table, but only tableInfo
 	// The following loop creates a stub job for every table
 	//
-	// &*job clones a stub job from the ActionCreateTables job
-	stubJob := &*job
+	// it clones a stub job from the ActionCreateTables job
+	stubJob := job.Clone()
 	stubJob.Args = make([]any, 1)
 	for i := range args {
 		stubJob.TableID = args[i].ID
diff --git a/pkg/disttask/framework/scheduler/scheduler_manager.go b/pkg/disttask/framework/scheduler/scheduler_manager.go
index a2f8f8789a708..186fc77702a7d 100644
--- a/pkg/disttask/framework/scheduler/scheduler_manager.go
+++ b/pkg/disttask/framework/scheduler/scheduler_manager.go
@@ -361,7 +361,7 @@ func (sm *Manager) startScheduler(basicTask *proto.TaskBase, allocateSlots bool,
 				sm.slotMgr.unReserve(basicTask, reservedExecID)
 			}
 			handle.NotifyTaskChange()
-			sm.logger.Info("task scheduler exist", zap.Int64("task-id", task.ID))
+			sm.logger.Info("task scheduler exit", zap.Int64("task-id", task.ID))
 		}()
 		metrics.UpdateMetricsForRunTask(task)
 		scheduler.ScheduleTask()
diff --git a/pkg/session/bootstrap.go b/pkg/session/bootstrap.go
index 22af88ed5d3a2..9a44541d6fdf0 100644
--- a/pkg/session/bootstrap.go
+++ b/pkg/session/bootstrap.go
@@ -1348,7 +1348,8 @@ func checkDistTask(s sessiontypes.Session, ver int64) {
 		// Not set yet.
 		return
 	} else if req.GetRow(0).GetString(0) == variable.On {
-		logutil.BgLogger().Fatal("check dist task failed, tidb_enable_dist_task is enabled", zap.Error(err))
+		logutil.BgLogger().Fatal("cannot upgrade when tidb_enable_dist_task is enabled, "+
+			"please set tidb_enable_dist_task to off before upgrade", zap.Error(err))
 	}
 
 	// Even if the variable is set to `off`, we still need to check the tidb_global_task.