fix backup defend issue

src/storage/backup/ob_backup_task.cpp

@@ -3993,7 +3993,6 @@ int ObLSBackupPrepareTask::get_tablet_min_filled_tx_log_ts_(
   } else if (tablet->get_tablet_meta().tablet_id_.is_ls_inner_tablet()) {
     // skip inner tablet
   } else {
-    min_filled_tx_log_ts = tablet->get_tablet_meta().clog_checkpoint_ts_;
     ObTabletTableStore &table_store = tablet->get_table_store();
     const ObSSTableArray &sstable_array = table_store.get_minor_sstables();
     has_minor_sstable = !sstable_array.empty();
@@ -4008,7 +4007,8 @@ int ObLSBackupPrepareTask::get_tablet_min_filled_tx_log_ts_(
         LOG_WARN("table ptr type not expectedd", K(ret));
       } else if (FALSE_IT(sstable = static_cast<ObSSTable *>(table_ptr))) {
       } else {
-        min_filled_tx_log_ts = std::min(sstable->get_meta().get_basic_meta().filled_tx_log_ts_, min_filled_tx_log_ts);
+        min_filled_tx_log_ts = std::min(
+          std::max(sstable->get_meta().get_basic_meta().filled_tx_log_ts_, sstable->get_end_log_ts()), min_filled_tx_log_ts);
       }
     }
   }

src/storage/backup/ob_backup_utils.cpp

@@ -252,7 +252,7 @@ int ObBackupUtils::check_tablet_minor_sstable_validity_(const storage::ObTabletH
     LOG_WARN("table ptr not correct", K(ret), KPC(last_table_ptr));
   } else {
     const ObITable::TableKey &table_key = last_table_ptr->get_key();
-    if (table_key.get_end_log_ts() != clog_checkpoint_ts) {
+    if (table_key.get_end_log_ts() < clog_checkpoint_ts) {
       ret = OB_ERR_UNEXPECTED;
       LOG_ERROR("tablet meta is not valid", K(ret), K(table_key), K(clog_checkpoint_ts));
     }