Traceback (most recent call last):

 "/usr/local/lib/python2.7/dist-packages/billiard/pool.py", line 1175, in mark_as_worker_lost
human_status(exitcode)),WorkerLostError: Worker exited prematurely: signal 9 (SIGKILL).
17:04:15 Traceback (most recent call last):


 "/usr/local/lib/python3.6/dist-packages/rq/worker.py", line 975, in perform_job

rv = job.perform()


 "/usr/local/lib/python3.6/dist-packages/rq/job.py", line 696, in perform

self._result = self._execute()


 "/usr/local/lib/python3.6/dist-packages/rq/job.py", line 719, in _execute

return self.func(*self.args, **self.kwargs)


 "/usr/local/lib/python3.6/dist-packages/hydra_plugins/hydra_rq_launcher/_core.py", line 43, in execute_job

job_subdir_key="hydra.sweep.subdir",


 "/usr/local/lib/python3.6/dist-packages/hydra/core/utils.py", line 125, in run_job

ret.return_value = task_function(task_cfg)


 "test_hydra.py", line 316, in main


 "/usr/local/lib/python3.6/dist-packages/torch_xla/distributed/xla_multiprocessing.py", line 395, in spawn

start_method=start_method)


 "/usr/local/lib/python3.6/dist-packages/torch/multiprocessing/spawn.py", line 148, in start_processes

process.start()


 "/usr/lib/python3.6/multiprocessing/process.py", line 105, in start

self._popen = self._Popen(self)


 "/usr/lib/python3.6/multiprocessing/context.py", line 284, in _Popen

return Popen(process_obj)


 "/usr/lib/python3.6/multiprocessing/popen_spawn_posix.py", line 32, in __init__

super().__init__(process_obj)


 "/usr/lib/python3.6/multiprocessing/popen_fork.py", line 19, in __init__

self._launch(process_obj)


 "/usr/lib/python3.6/multiprocessing/popen_spawn_posix.py", line 47, in _launch

reduction.dump(process_obj, fp)


 "/usr/lib/python3.6/multiprocessing/reduction.py", line 60, in dump

ForkingPickler(file, protocol).dump(obj)
_pickle.PicklingError: Can't pickle <function map_fn at 0x7f8a9a0f3ea0>: attribute lookup map_fn on __main__ failed
