I’m trying some really basic code:
from ray import tune
from ray.rllib.agents.ppo import PPOTrainer
tune.run(PPOTrainer, config={"env": "CartPole-v0"})
But it’s always pending with this message:
2021-11-02 14:19:26,189 WARNING trial_executor.py:306 – Ignore this message if the cluster is autoscaling. You asked for 3.0 cpu and 0.0 gpu per trial, but the cluster only has 2.0 cpu and 1.0 gpu. Stop the tuning job and adjust the resources requested per trial (possibly via
resources_per_trial
or vianum_workers
for rllib) and/or add more resources to your Ray runtime.
Then I add this code:
PPOTrainer.default_resource_request({'cpu':1, "gpu":1})
with the intent to request less cpu to make it run. But nothing happened. It still needs “3.0 cpu and 0.0 gpu per trial”.
Then I try to use the parameter resources_per_trial from tune.run then I get an error:
ValueError: Resources for <class 'ray.rllib.agents.trainer_template.PPO'> have been automatically set to <ray.tune.utils.placement_groups.PlacementGroupFactory object at 0x7f1f64833290> by its `default_resource_request()` method. Please clear the `resources_per_trial` option.
Now what do I do?