[CP] fix the recovery failure, because log archive piece is incorrect deleted when obsolete clean

src/rootserver/ob_backup_data_clean.cpp

@@ -1296,6 +1296,7 @@ int ObBackupDataClean::add_sys_tenant_obsolete_backup_sets(const share::ObBackup
   } else if (OB_FAIL(get_cluster_max_succeed_backup_set(copy_id, cluster_max_backup_set_id))) {
     LOG_WARN("failed to get cluster max succeed backup set", K(ret), K(clean_info));
   } else {
+    // Traverse in reverse order by backup_set_id
     for (int64_t i = task_infos.count() - 1; OB_SUCC(ret) && i >= 0; --i) {
       is_continue = false;
       const ObTenantBackupTaskInfo &task_info = task_infos.at(i);
@@ -1326,6 +1327,7 @@ int ObBackupDataClean::add_sys_tenant_obsolete_backup_sets(const share::ObBackup
 
       if (OB_FAIL(ret)) {
       } else if (need_add_backup_set) {
+        // successful and not obsolete backup sets need to added, because of the touch feature
         if (OB_FAIL(reverse_task_infos.push_back(task_info))) {
           LOG_WARN("failed to push task info into array", K(ret), K(task_info));
         } else if (OB_FAIL(reverse_backup_set_ids.push_back(backup_set_id))) {
@@ -1497,34 +1499,23 @@ int ObBackupDataClean::add_obsolete_backup_set_with_order(const share::ObBackupC
         K(reverse_backup_set_ids));
   } else {
     bool is_deleted_set_contine = true;
-    bool is_set_clog_clean_point = false;
     ObBackupSetId new_backup_set_id;
     ObBackupDestOpt backup_dest_option;
+    // Traverse in order of backup_set_id, reset clog_data_clean_point to ensure sequential deletion
     for (int64_t i = reverse_task_infos.count() - 1; OB_SUCC(ret) && i >= 0; --i) {
       backup_dest_option.reset();
       const ObTenantBackupTaskInfo &task_info = reverse_task_infos.at(i);
       const ObBackupSetId &backup_set_id = reverse_backup_set_ids.at(i);
       new_backup_set_id = backup_set_id;
       if (!is_deleted_set_contine) {
-        if (clean_info.is_delete_obsolete_backup_backup()) {
+        if (task_info.is_result_succeed()) {
           new_backup_set_id.clean_mode_ = ObBackupDataCleanMode::TOUCH;
-          if (task_info.is_result_succeed() && !is_set_clog_clean_point) {
-            clog_data_clean_point = task_info;
-            is_set_clog_clean_point = true;
-          }
-        } else if (task_info.is_result_succeed()) {
-          new_backup_set_id.clean_mode_ = ObBackupDataCleanMode::TOUCH;
-          if (!is_set_clog_clean_point) {
-            clog_data_clean_point = task_info;
-            is_set_clog_clean_point = true;
-          }
-        } else {
-          // do nothing
         }
       } else if (ObBackupDataCleanMode::CLEAN == backup_set_id.clean_mode_) {
         // do nothing
       } else {
         is_deleted_set_contine = false;
+        clog_data_clean_point = task_info;
       }
 
       if (OB_FAIL(get_backup_dest_option(task_info.backup_dest_, backup_dest_option))) {