Also stuck in env.reset() in example

[praveen-palanisamy]

Also stuck in env.reset() in example

[Morphlng]

Problem located

I'm also having this problem; the only difference is that I'm using Windows.

By doing some workaround, I'm able to have macad-gym code run on Windows platform, but I'm also sticking at env.reset(). With a step-by-step debugging, I've already locate the problem to here:

macad-gym/src/macad_gym/carla/multi_env.py

Lines 478 to 487 in 38884ac

	self._client = None
	while self._client is None:
	try:
	self._client = carla.Client("localhost", self._server_port)
	self._client.set_timeout(2.0)
	self._client.get_server_version()
	except RuntimeError as re:
	if "timeout" not in str(re) and "time-out" not in str(re):
	print("Could not connect to Carla server because:", re)
	self._client = None

The reason why this loop is infinite is because the Subprocess bind the port to a Python process instead of CarlaUE4 (or more specifically, CarlaUE4-Win64-Shipping.exe on Windows). Which lead us back to the upper create subprocess code:

macad-gym/src/macad_gym/carla/multi_env.py

Lines 453 to 470 in 38884ac

	self._server_process = subprocess.Popen(
	[
	SERVER_BINARY,
	self._server_map,
	"-windowed",
	"-ResX=",
	str(self._env_config["render_x_res"]),
	"-ResY=",
	str(self._env_config["render_y_res"]),
	"-benchmark -fps=20",
	"-carla-server",
	"-carla-world-port={} -carla-streaming-port=0".format(
	self._server_port),
	],
	preexec_fn=os.setsid,
	stdout=open(log_file, "w"),
	)
	print("Running simulation in single-GPU mode")

I'm able to start a Carla server directly using my command-line, the carla.Client connect to it without a problem. However, I'm still trying to find a way to make the Python code work as expected.

Environment Info

The environment details I'm using is as below:

1. Windows 11 latest build
2. Carla 0.9.13 pre-built release (since the issuer said falling back to 0.9.4 doesn't help, I'm not going to try that now)
3. Carla Python API 0.9.13_cp38 from pypi.prg

[praveen-palanisamy]

Hi @KID0031,
From the log it looks like the CARLA server was not launched on your machine for some reason. I am assuming that you have followed the setup steps described here.
Could you share your output for: echo $CARLA_SERVER?
Also, are you able to execute: bash $CARLA_SERVER without any issues?

[praveen-palanisamy]

@KID0031 : Please try the latest version with MorphIng's fixes, which likely resolves the issue you are facing. You would want to clone this repo, pull the latest changes and install the python package from source using: pip install -e .

I am closing this issue based on MorphIng's PR comments & fixes. Please re-open if you are still facing this issue.