[Question] Intermittent NoneType Unpacking Error in step_wait() #371
Description
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Questions
I encountered an intermittent error while running training using this repository. The error occurs occasionally and is not easily reproducible with the same configuration. I am running another task on a different GPU at the same time. Could this cause interference?
Processing rollout for epoch: 21... ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╸ 100% 0:00:01
Traceback (most recent call last):
File "/home/sunyuanxu/Algorithm/examples/train_policy.py", line 96, in
agent.learn()
File "/home/sunyuanxu/Algorithm/omnisafe/algorithms/algo_wrapper.py", line 187, in learn
ep_ret, ep_cost, ep_len = self.agent.learn()
File "/home/sunyuanxu/Algorithm/omnisafe/algorithms/on_policy/base/policy_gradient.py", line 260, in learn
self._env.rollout(
File "/home/sunyuanxu/Algorithm/omnisafe/adapter/my_adapter.py", line 47, in rollout
next_obs, reward, cost, terminated, truncated, info = self.step(act)
File "/home/sunyuanxu/Algorithm/omnisafe/adapter/online_adapter.py", line 205, in step
return self._env.step(action)
File "/home/sunyuanxu/Algorithm/omnisafe/envs/wrapper.py", line 514, in step
return super().step(action)
File "/home/sunyuanxu/Algorithm/omnisafe/envs/core.py", line 245, in step
return self._env.step(action)
File "/home/sunyuanxu/Algorithm/omnisafe/envs/wrapper.py", line 231, in step
obs, reward, cost, terminated, truncated, info = super().step(action)
File "/home/sunyuanxu/Algorithm/omnisafe/envs/core.py", line 245, in step
return self._env.step(action)
File "/home/sunyuanxu/Algorithm/omnisafe/envs/safety_gymnasium_env.py", line 190, in step
obs, reward, cost, terminated, truncated, info = self._env.step(
File "/home/sunyuanxu/miniconda3/envs/new_omnisafe/lib/python3.10/site-packages/gymnasium/vector/vector_env.py", line 203, in step
return self.step_wait()
File "/home/sunyuanxu/new-safety-gymnasium/safety_gymnasium/vector/async_vector_env.py", line 123, in step_wait
obs, rew, cost, terminated, truncated, info = result
TypeError: cannot unpack non-iterable NoneType object