*****************************************
Setting OMP_NUM_THREADS environment variable for each process to be 1 in default, to avoid your system being overloaded, please further tune the variable for optimal performance in your application as needed.
*****************************************
init pg, pid: 16652
init pg, pid: 16651
step : 0, pid: 16651
Traceback (most recent call last):
  File "./trainer.py", line 153, in <module>
    main()
  File "./trainer.py", line 140, in main
    raise e
  File "./trainer.py", line 137, in main
    return train(env)
  File "./trainer.py", line 110, in train
    raise Exception("test exception")
Exception: test exception
step : 0, pid: 16652
16652 starting 0 batch
WARNING:torch.distributed.elastic.multiprocessing.api:Sending process 16652 closing signal SIGTERM
ERROR:torch.distributed.elastic.multiprocessing.api:failed (exitcode: 1) local_rank: 0 (pid: 16651) of binary: /home/ubuntu/miniconda3/envs/aivanou-dev/bin/python
Traceback (most recent call last):
  File "/home/ubuntu/miniconda3/envs/aivanou-dev/lib/python3.8/runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/home/ubuntu/miniconda3/envs/aivanou-dev/lib/python3.8/runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "/home/ubuntu/miniconda3/envs/aivanou-dev/lib/python3.8/site-packages/torch/distributed/run.py", line 723, in <module>
    main()
  File "/home/ubuntu/miniconda3/envs/aivanou-dev/lib/python3.8/site-packages/torch/distributed/elastic/multiprocessing/errors/__init__.py", line 345, in wrapper
    return f(*args, **kwargs)
  File "/home/ubuntu/miniconda3/envs/aivanou-dev/lib/python3.8/site-packages/torch/distributed/run.py", line 719, in main
    run(args)
  File "/home/ubuntu/miniconda3/envs/aivanou-dev/lib/python3.8/site-packages/torch/distributed/run.py", line 710, in run
    elastic_launch(
  File "/home/ubuntu/miniconda3/envs/aivanou-dev/lib/python3.8/site-packages/torch/distributed/launcher/api.py", line 132, in __call__
    return launch_agent(self._config, self._entrypoint, list(args))
  File "/home/ubuntu/miniconda3/envs/aivanou-dev/lib/python3.8/site-packages/torch/distributed/launcher/api.py", line 276, in launch_agent
    raise ChildFailedError(
torch.distributed.elastic.multiprocessing.errors.ChildFailedError:
============================================================
./trainer.py FAILED
------------------------------------------------------------
Failures:
  <NO_OTHER_FAILURES>
------------------------------------------------------------
Root Cause (first observed failure):
[0]:
  time      : 2022-02-08_16:33:51
  host      : ip-172-31-24-178.us-west-2.compute.internal
  rank      : 0 (local_rank: 0)
  exitcode  : 1 (pid: 16651)
  error_file: <N/A>
  traceback : To enable traceback see: https://pytorch.org/docs/stable/elastic/errors.html
============================================================