Hi!
I'm currently on SUMO version 1.1.0, but the same error occurs for someone on 1.2.0 too. The error is that traci throws an error saying that the departLane for a vehicle is flawed (and then I get another error):
(pid=6012) Error: Answered with error to command 0xc4: Invalid departLane definition for vehicle 'idm_0';
(pid=6012) must be one of ("random", "free", "allowed", "best", "first", or an int>=0)
(pid=6012) Error: Answered with error to command 0xc4: Vehicle 'idm_0' is not known
2019-11-30 15:38:19,812 ERROR trial_runner.py:550 -- Error processing event.
Traceback (most recent call last):
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/tune/trial_runner.py", line 498, in _process_trial
result = self.trial_executor.fetch_result(trial)
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/tune/ray_trial_executor.py", line 342, in fetch_result
result = ray.get(trial_future[0])
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/worker.py", line 2247, in get
raise value
ray.exceptions.RayTaskError: ray_PPO:train() (pid=6012, host=thankyou-always)
File "/home/thankyou-always/Desktop/flow/flow/envs/base.py", line 487, in reset
speed=speed)
File "/home/thankyou-always/Desktop/flow/flow/core/kernel/vehicle/traci.py", line 1028, in add
departSpeed=str(speed))
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/traci/_vehicle.py", line 1428, in add
self._connection._sendExact()
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/traci/connection.py", line 106, in _sendExact
raise TraCIException(err, prefix[1], _RESULTS[prefix[2]])
traci.exceptions.TraCIException: Invalid departLane definition for vehicle 'idm_0';
must be one of ("random", "free", "allowed", "best", "first", or an int>=0)
During handling of the above exception, another exception occurred:
ray_PPO:train() (pid=6012, host=thankyou-always)
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/rllib/agents/trainer.py", line 372, in train
raise e
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/rllib/agents/trainer.py", line 358, in train
result = Trainable.train(self)
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/tune/trainable.py", line 171, in train
result = self._train()
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/rllib/agents/trainer_template.py", line 126, in _train
fetches = self.optimizer.step()
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/rllib/optimizers/multi_gpu_optimizer.py", line 151, in step
samples.append(self.workers.local_worker().sample())
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/rllib/evaluation/rollout_worker.py", line 453, in sample
batches = [self.input_reader.next()]
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/rllib/evaluation/sampler.py", line 56, in next
batches = [self.get_data()]
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/rllib/evaluation/sampler.py", line 97, in get_data
item = next(self.rollout_provider)
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/rllib/evaluation/sampler.py", line 313, in _env_runner
soft_horizon)
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/rllib/evaluation/sampler.py", line 473, in _process_observations
resetted_obs = base_env.try_reset(env_id)
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/rllib/env/base_env.py", line 336, in try_reset
return {_DUMMY_AGENT_ID: self.vector_env.reset_at(env_id)}
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/ray/rllib/env/vector_env.py", line 104, in reset_at
return self.envs[index].reset()
File "/home/thankyou-always/Desktop/flow/flow/envs/base.py", line 500, in reset
self.k.kernel_api.vehicle.remove(veh_id) # FIXME: hack
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/traci/_vehicle.py", line 1436, in remove
tc.CMD_SET_VEHICLE_VARIABLE, tc.REMOVE, vehID, reason)
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/traci/connection.py", line 143, in _sendByteCmd
self._sendExact()
File "/home/thankyou-always/anaconda3/envs/flow/lib/python3.6/site-packages/traci/connection.py", line 106, in _sendExact
raise TraCIException(err, prefix[1], _RESULTS[prefix[2]])
traci.exceptions.TraCIException: Vehicle 'idm_0' is not known
And so, I print out the actual value for the corresponding departLane:
(pid=6012) lane_index is 0
(pid=6012) veh_id is idm_0
(pid=6012) No error
(pid=6012) lane_index is 0
(pid=6012) veh_id is idm_1
(pid=6012) No error
(pid=6012) lane_index is 0
(pid=6012) veh_id is idm_2
(pid=6012) No error
(pid=6012) lane_index is 0
(pid=6012) veh_id is idm_3
(pid=6012) No error
(pid=6012) lane_index is 0
(pid=6012) veh_id is idm_4
(These print values are for when there's no error. The number to the right of 'lane_index' is the value fed into "departLane" when adding a vehicle via traci vehicle add.)
When the error occurs, I still input the same values.
i.e. printed out:
(pid=6012) lane_index is 0
(pid=6012) veh_id is idm_11
(pid=6012) Error
(pid=6012) lane_index is 0
(pid=6012) veh_id is idm_0
[Error message follows]
Would anyone have a clue to why traci responds differently to the same inputs when I'm adding a vehicle?
Thanks for your time!
Kevin
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