Error: mlagents_envs.registry

[yoheigon]

Describe the bug
UnityTimeOutException: The Unity environment took too long to respond. Make sure that :
The environment does not need user interaction to launch
The Agents are linked to the appropriate Brains
The environment and the Python interface have compatible versions.

To Reproduce
Steps to reproduce the behavior:

1. install mlagents-envs-0.17.0
2. execute this
   from mlagents_envs.registry import default_registry
   env = default_registry["Basic"].make()

Console logs / stack traces
UnityTimeOutException Traceback (most recent call last)
in ()
----> 1 env = default_registry["Hallway"].make()

~/anaconda3/envs/python3/lib/python3.6/site-packages/mlagents_envs/registry/remote_registry_entry.py in make(self, **kwargs)
69 args += self._add_args
70 kwargs["additional_args"] = args
---> 71 return UnityEnvironment(file_name=path, **kwargs)

~/anaconda3/envs/python3/lib/python3.6/site-packages/mlagents_envs/environment.py in init(self, file_name, worker_id, base_port, seed, no_graphics, timeout_wait, additional_args, side_channels, log_folder)
209 )
210 try:
--> 211 aca_output = self._send_academy_parameters(rl_init_parameters_in)
212 aca_params = aca_output.rl_initialization_output
213 except UnityTimeOutException:

~/anaconda3/envs/python3/lib/python3.6/site-packages/mlagents_envs/environment.py in _send_academy_parameters(self, init_parameters)
454 inputs = UnityInputProto()
455 inputs.rl_initialization_input.CopyFrom(init_parameters)
--> 456 return self._communicator.initialize(inputs)
457
458 @staticmethod

~/anaconda3/envs/python3/lib/python3.6/site-packages/mlagents_envs/rpc_communicator.py in initialize(self, inputs)
102
103 def initialize(self, inputs: UnityInputProto) -> UnityOutputProto:
--> 104 self.poll_for_timeout()
105 aca_param = self.unity_to_external.parent_conn.recv().unity_output
106 message = UnityMessageProto()

~/anaconda3/envs/python3/lib/python3.6/site-packages/mlagents_envs/rpc_communicator.py in poll_for_timeout(self)
95 if not self.unity_to_external.parent_conn.poll(self.timeout_wait):
96 raise UnityTimeOutException(
---> 97 "The Unity environment took too long to respond. Make sure that :\n"
98 "\t The environment does not need user interaction to launch\n"
99 "\t The Agents are linked to the appropriate Brains\n"

UnityTimeOutException: The Unity environment took too long to respond. Make sure that :
The environment does not need user interaction to launch
The Agents are linked to the appropriate Brains
The environment and the Python interface have compatible versions.

Environment (please complete the following information):

• TensorFlow version: 1.15.2
  mlagents-envs-0.17.0

[chriselion]

Can you try some of the suggestions here: https://github.com/Unity-Technologies/ml-agents/blob/master/docs/FAQ.md#environment-connection-timeout ?

[yoheigon]

Thank you for your suggestion.

• Cause: There may be no agent in the scene
  This env is provided by default_registry so I assume there is an agent in the scene.

• Cause: On OSX, the firewall may be preventing communication with the environment. Solution: Add the built environment binary to the list of exceptions on the firewall by following instructions.
  I have checked there is no firewall.

• Cause: An error happened in the Unity Environment preventing communication. Solution: Look into the log files generated by the Unity Environment to figure what error happened.
  This was the log
  '''
  Mono path[0] = '/tmp/ml-agents-binaries/binaries/Basic-b1b94a0ae13eef9d91f9d8db1e5770c5/Startup/Startup_Data/Managed'
  Mono config path = '/tmp/ml-agents-binaries/binaries/Basic-b1b94a0ae13eef9d91f9d8db1e5770c5/Startup/Startup_Data/MonoBleedingEdge/etc'
  PlayerConnection initialized from /tmp/ml-agents-binaries/binaries/Basic-b1b94a0ae13eef9d91f9d8db1e5770c5/Startup/Startup_Data (debug = 0)
  PlayerConnection initialized network socket : 0.0.0.0 55404
  Multi-casting "[IP] 172.31.17.102 [Port] 55404 [Flags] 2 [Guid] 946481988 [EditorId] 429131514 [Version] 1048832 [Id] LinuxPlayer(172.31.17.102) [Debug] 0 [PackageName] LinuxPlayer [ProjectName] UnityEnvironment" to [225.0.0.222:54997]...
  Started listening to [0.0.0.0:55404]
  Preloaded 'libgrpc_csharp_ext.x64.so'
  Unable to preload the following plugins:
  lib_burst_generated.so
  PlayerConnection already initialized - listening to [0.0.0.0:55404]
  Unable to load player prefs
  Desktop is 0 x 0 @ 0 Hz
  Invalid initial resolution 80 x 80 - forcing to 100 x 100
  '''

• Cause: You have assigned HTTP_PROXY and HTTPS_PROXY values in your environment variables. Solution: Remove these values and try again.
  I have checked the environment variables but they are not set.

[chriselion]

A few other questions:

• Are you on Mac or Linux?
• Can you try passing no_graphics=True to the make() method?

[yoheigon]

no_graphics=True worked on my linux environment.
Thank you!

[chriselion]

Glad that worked; I added a note to the FAQ in #4159

[github-actions]

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