traci.exceptions.FatalTraCIError: connection closed by SUMO

[Adaickalavan]

Hi @behrisch,

We (@Gamenot @Adaickalavan) had previously communicated on this traci.exceptions.FatalTraCIError: connection closed by SUMO in #8125 and in huawei-noah/SMARTS#472 issues.

In short, we have used SUMO for a reinforcement learning application. Notably, in this application, we take over vehicles in specific regions, control them with complex vehicle control models, and release them at a later time. Running the simulation with SUMO throws the traci.exceptions.FatalTraCIError: connection closed by SUMO error.

Following up on our previous conversation on this matter, we have created a containerized example to reproduce the error in huawei-noah/SMARTS#619. Upon running the Docker image, the traffic simulation will crash at step 1166 with the
traci.exceptions.FatalTraCIError: connection closed by SUMO error.

Hopefully this Docker image will help in debugging this error. Thank you.

[behrisch]

@Adaickalavan Thanks for keeping track on this one. I can now reproduce it.

[Gamenot]

@behrisch I have updated the instructions on huawei-noah/SMARTS#619 to address your comment there.

[dineshresearch]

Any update regrading the issue? I am still facing this issue @behrisch @Adaickalavan

[pearlahajjar]

I am still facing this issue. Any updates?

Error message:

Traceback (most recent call last):
File "C:\Users\hajjar.p\PycharmProjects\SUMO Python\main.py", line 102, in
traci.start([sumoBinary, "-c", "C:/Users/hajjar.p/Desktop/New folder/Python Sumo test/cross.sumocfg",
File "C:\Program Files (x86)\Eclipse\Sumo\tools\traci\main.py", line 170, in start
return init(sumoPort, numRetries, "localhost", label, sumoProcess, doSwitch)
File "C:\Program Files (x86)\Eclipse\Sumo\tools\traci\main.py", line 140, in init
return _connections[label].getVersion()
File "C:\Program Files (x86)\Eclipse\Sumo\tools\traci\connection.py", line 370, in getVersion
result = self._sendCmd(command, None, None)
File "C:\Program Files (x86)\Eclipse\Sumo\tools\traci\connection.py", line 181, in _sendCmd
return self._sendExact()
File "C:\Program Files (x86)\Eclipse\Sumo\tools\traci\connection.py", line 91, in _sendExact
raise FatalTraCIError("connection closed by SUMO")
traci.exceptions.FatalTraCIError: connection closed by SUMO

Process finished with exit code 1