docstr: Refresh and get info for this node, updating the cache.
docstr_tok: ["Refresh","and","get","info","for","this","node",",","updating","the","cache","."]
code: def _get_node(self, node_id):
      """Refresh and get info for this node, updating the cache."""
      self.non_terminated_nodes({})  # Side effect: updates cache
  
      if node_id in self.cached_nodes:
          return self.cached_nodes[node_id]
  
      # Node not in {pending, running} -- retry with a point query. This
      # usually means the node was recently preempted or terminated.
      matches = self.acs.describe_instances(instance_ids=[node_id])
  
      assert len(matches) == 1, "Invalid instance id {}".format(node_id)
      return matches[0]
  
imports: import logging
  import random
  import threading
  import time
  from collections import defaultdict
  from typing import Any, Dict, List, Optional
  from ray.autoscaler._private.aliyun.config import PENDING, RUNNING, STOPPED, STOPPING, bootstrap_aliyun
  from ray.autoscaler._private.aliyun.utils import AcsClient
  from ray.autoscaler._private.cli_logger import cli_logger
  from ray.autoscaler._private.constants import BOTO_MAX_RETRIES
  from ray.autoscaler._private.log_timer import LogTimer
  from ray.autoscaler.node_provider import NodeProvider
  from ray.autoscaler.tags import TAG_RAY_CLUSTER_NAME, TAG_RAY_LAUNCH_CONFIG, TAG_RAY_NODE_KIND, TAG_RAY_NODE_NAME, TAG_RAY_NODE_STATUS, TAG_RAY_USER_NODE_TYPE
label_desc: Use image node_id 14 for calling the AliyunNodeProvider obj's underlying member method code with example usage: obj._get_node(node_id) and returns: matches, self