class_docstr: Manages a MXNet model for training.
class_docstr_tok: ["Manages","a","MXNet","model","for","training","."]
docstr: Attempts to shut down the runner.
docstr_tok: ["Attempts","to","shut","down","the","runner","."]
code: def shutdown(self):
      """Attempts to shut down the runner."""
      del self.logger
      if self.is_worker:
          del self.kv
          del self.model
          del self.trainer
          del self.loss
          del self.eval_metrics
          del self.val_metrics
  
file_path: BigDL/python/orca/src/bigdl/orca/learn/mxnet/mxnet_runner.py
imports: import os
  import time
  import logging
  import subprocess
  import ray._private.services
  import mxnet
  from mxnet import gluon
  import copy
  from bigdl.orca.ray.utils import to_list
  from bigdl.dllib.utils.log4Error import *
label_desc: Use image node_id 3 for calling the MXNetRunner obj's underlying member method code with example usage: obj.shutdown() without return types