class_docstr: InstanceReconciler is responsible for reconciling the difference between
  node provider and instance storage. It is also responsible for handling
  failures.
code: def _handle_ray_failure(self, instance_ids: List[str]) -> int:
      failing_instances, _ = self._instance_storage.get_instances(
          instance_ids=instance_ids,
          status_filter={
              Instance.RAY_STOPPED,
              Instance.RAY_INSTALL_FAILED,
          },
      )
      if not failing_instances:
          logger.debug("No ray failure")
          return
  
      failing_instances = failing_instances.values()
      for instance in failing_instances:
          # this call is asynchronous.
          self._node_provider.terminate_node(instance.cloud_instance_id)
  
          instance.status = Instance.STOPPING
          result, _ = self._instance_storage.upsert_instance(
              instance, expected_instance_version=instance.version
          )
          if not result:
              logger.warning(
                  "Failed to update instance status to STOPPING"
              )
  
file_path: ray/python/ray/autoscaler/v2/instance_manager/subscribers/reconciler.py
imports: import logging
  import threading
  from concurrent.futures import ThreadPoolExecutor
  from typing import List
  from ray.autoscaler.v2.instance_manager.instance_storage import InstanceStorage, InstanceUpdatedSubscriber
  from ray.autoscaler.v2.instance_manager.node_provider import NodeProvider
  from ray.core.generated.instance_manager_pb2 import Instance, InstanceUpdateEvent
label_desc: Use image node_id 4 for calling the InstanceReconciler obj's underlying member method code with example usage: obj._handle_ray_failure(instance_ids) without return types