fix some ddl problems.

src/rootserver/ddl_task/ob_ddl_scheduler.cpp

@@ -1375,7 +1375,7 @@ int ObDDLScheduler::on_ddl_task_finish(
     LOG_WARN("invalid arguments", K(ret), K(parent_task_id), K(child_task_key));
   } else {
     ObDDLTask *ddl_task = nullptr;
-    ObTableRedefinitionTask *redefinition_task = nullptr;
+    ObDDLRedefinitionTask *redefinition_task = nullptr;
     if (OB_FAIL(task_queue_.get_task(parent_task_id, ddl_task))) {
       if (OB_ENTRY_NOT_EXIST == ret) {
         bool is_cancel = false;
@@ -1395,7 +1395,7 @@ int ObDDLScheduler::on_ddl_task_finish(
     } else if (OB_ISNULL(ddl_task)) {
       ret = OB_ERR_SYS;
       LOG_WARN("ddl task must not be nullptr", K(ret));
-    } else if (FALSE_IT(redefinition_task = static_cast<ObTableRedefinitionTask *>(ddl_task))) {
+    } else if (FALSE_IT(redefinition_task = static_cast<ObDDLRedefinitionTask *>(ddl_task))) {
     } else if (OB_FAIL(redefinition_task->on_child_task_finish(child_task_key, ret_code))) {
       LOG_WARN("on child task finish failed", K(ret), K(child_task_key));
     }

src/rootserver/ddl_task/ob_ddl_task.cpp

@@ -487,8 +487,7 @@ int ObDDLTask::wait_trans_end(
   // try wait transaction end
   if (OB_SUCC(ret) && new_status != next_task_status && tmp_snapshot_version <= 0) {
     bool is_trans_end = false;
-    const bool need_wait_trans_end = true;
-    if (OB_FAIL(wait_trans_ctx.try_wait(is_trans_end, tmp_snapshot_version, need_wait_trans_end))) {
+    if (OB_FAIL(wait_trans_ctx.try_wait(is_trans_end, tmp_snapshot_version, true /*need_wait_trans_end */))) {
       if (OB_EAGAIN != ret) {
         LOG_WARN("fail to try wait transaction", K(ret));
       } else {
@@ -803,7 +802,7 @@ int ObDDLWaitTransEndCtx::try_wait(bool &is_trans_end, int64_t &snapshot_version
           if (OB_SUCCESS == ret_codes.at(i) && tmp_snapshots.at(i) > 0) {
             snapshot_array_.at(tablet_pos_indexes.at(i)) = tmp_snapshots.at(i);
             ++succ_count;
-          } else if (OB_EAGAIN == ret_codes.at(i)) {
+          } else if (ObIDDLTask::in_ddl_retry_white_list(ret_codes.at(i))) {
             // need retry
           } else if (OB_SUCCESS != ret_codes.at(i)) {
             ret = ret_codes.at(i);