Make sure that state generation is no ahead of cluster generation (#2… (ydb-platform#25043)

Co-authored-by: Copilot <[email protected]>

Author: eivanov89

ydb/apps/bridge_skipper_demo/bridge.py

@@ -458,6 +458,19 @@ def __init__(self, path_to_cli: str, initial_piles: Dict[str, List[str]], use_ht
         # Attempt to load previous state if provided
         try:
             self._load_state()
+            # Check that loaded state generation is not ahead of what cluster reports
+            if self.current_state:
+                try:
+                    pile_world_views = self.async_checker.get_health_state()
+                    latest_generation = health.get_latest_generation_pile(pile_world_views)[0]
+                    logger.info(f"Loaded state: {self.current_state}, cluster reported latest generation: {latest_generation}")
+                    if self.current_state.generation and latest_generation and self.current_state.generation > latest_generation:
+                        logger.error(f"Generation {self.current_state.generation} from state file is ahead of cluster generation {latest_generation}")
+                        self.async_checker.stop(wait=True)
+                        sys.exit(1)
+                except Exception as e:
+                    logger.error(f"Failed to get health state or latest generation: {e}")
+
         except Exception as e:
             logger.debug(f"Failed to load saved state: {e}")