Hi Jakob.
If I have the error"Could not connect to TraCI server at ..",will this be
solved by repeating the simulation in the same traci connection?If  yes
,how?

Best regards,
Zhiqiang

Jakob Erdmann <namdre.s...@gmail.com> 于2018年7月11日周三 下午6:52写道:

> If you have the error "connection closed by SUMO" this would not be solved
> by repeating the simulation in the same traci connection. Diagnose it using
> logfiles as explained in my last email.
>
> 2018-07-11 12:29 GMT+02:00 胡志强 <hzq950...@gmail.com>:
>
>> Hi Jakob,
>> I have add the option numTries=100 to traci.start(),but the error is
>> still exist.Could you please tell me is there a approach to repeat my
>> simulation in the same traci ?Then ,I don't need to connect the server
>> again and again,my problem solved.
>>
>> Best regards,
>> Zhiqiang
>>
>> Jakob Erdmann <namdre.s...@gmail.com> 于2018年7月11日周三 下午2:44写道:
>>
>>> the error "connection closed by SUMO"  indicates that an error ocurred
>>> on the SUMO side.
>>> If you create a log file for every sumo run you can look for the problem
>>> in the latest logfile:
>>>
>>> for i in range(20000):
>>>    traci.start([sumoBinary, "--start","-c", "data/cross.sumocfg",
>>>                           "--tripinfo-output", "tripinfo.xml", "log",
>>> str(i)])
>>>
>>>
>>> 2018-07-11 5:47 GMT+02:00 胡志强 <hzq950...@gmail.com>:
>>>
>>>> Hi Jakob,
>>>> Thank you,it works.But the problem is also exist,it retries for 101
>>>> times then closed and I'm sure that my computer's memory is enough.And I
>>>> also occurred the error that "connection closed by SUMO",If you want more
>>>> details,tell me.
>>>>
>>>> Best regards,
>>>> Zhiqiang
>>>>
>>>> Jakob Erdmann <namdre.s...@gmail.com> 于2018年7月11日周三 上午1:13写道:
>>>>
>>>>> traci.start([sumoBinary, "--start","-c", "data/cross.sumocfg",
>>>>>                           "--tripinfo-output", "tripinfo.xml"],
>>>>> numTries=100)
>>>>>
>>>>>
>>>>> 2018-07-10 16:46 GMT+02:00 胡志强 <hzq950...@gmail.com>:
>>>>>
>>>>>> Hi,
>>>>>> Could you please tell me how add the option numTries=100 to
>>>>>> traci.start()?
>>>>>>
>>>>>> Best regards,
>>>>>> Zhiqiang
>>>>>>
>>>>>> Jakob Erdmann <namdre.s...@gmail.com> 于2018年7月10日周二 下午10:27写道:
>>>>>>
>>>>>>> - Possibly the simulation cannot start in time because the computer
>>>>>>> is still busy from closing the previous simulations. You could add the
>>>>>>> option numTries=100 to traci.start() to diagnose this
>>>>>>> - Possibly, the simulation cannot start successfully because your
>>>>>>> computer is out of memory (which might indicate a memory leak in sumo).
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> 2018-07-10 16:04 GMT+02:00 胡志强 <hzq950...@gmail.com>:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>> My SUMO version is 0.32.0,and I write a loop to simulate for many
>>>>>>>> times, I start SUMO like this:
>>>>>>>> for i in range(20000):
>>>>>>>>     traci.start([sumoBinary, "--start","-c", "data/cross.sumocfg",
>>>>>>>>                           "--tripinfo-output", "tripinfo.xml"])
>>>>>>>>     ...
>>>>>>>>     ...
>>>>>>>>     traci.close()
>>>>>>>> At the beginning,it works well,but it may disconnect with traci and
>>>>>>>> the time points is different.I don't know what's wrong.
>>>>>>>>
>>>>>>>> Menno van der Woude <me...@codingconnected.eu> 于2018年7月10日周二
>>>>>>>> 下午9:32写道:
>>>>>>>>
>>>>>>>>> Hi Zhiqiang,
>>>>>>>>>
>>>>>>>>> it could be helpful if you provide some more details:
>>>>>>>>> Under what circumstances does the connection fail? Do the
>>>>>>>>> circumstances
>>>>>>>>> during failure differ from before? Does it disconnect while it is
>>>>>>>>> connected, or not connect at all? Etc.
>>>>>>>>> Also, how are you starting SUMO, manually, programmatically? Etc.
>>>>>>>>>
>>>>>>>>> Greets, Menno
>>>>>>>>>
>>>>>>>>> On 10-7-2018 15:27, 胡志强 wrote:
>>>>>>>>> > At the beginning ,it works well,but some time later,it may
>>>>>>>>> disconnect
>>>>>>>>> > with the sever.So ,what's the possible reasons?
>>>>>>>>> >
>>>>>>>>> > Best regards,
>>>>>>>>> > Zhiqiang
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > Menno van der Woude <me...@codingconnected.eu
>>>>>>>>> > <mailto:me...@codingconnected.eu>> 于2018年7月10日周二 下午8:44写道:
>>>>>>>>> >
>>>>>>>>> >     Hi Zhiqiang,
>>>>>>>>> >
>>>>>>>>> >     it seems like SUMO is not running, since the the client
>>>>>>>>> cannot connect
>>>>>>>>> >     to the TCP server. Make sure you start SUMO with the
>>>>>>>>> --remote-port
>>>>>>>>> >     <INT>
>>>>>>>>> >     option as described here:
>>>>>>>>> http://sumo.dlr.de/wiki/TraCI#SUMO_startup.
>>>>>>>>> >
>>>>>>>>> >     If you need to simulate many runs, you will have to automate
>>>>>>>>> starting
>>>>>>>>> >     SUMO as well.
>>>>>>>>> >
>>>>>>>>> >     Greets,
>>>>>>>>> >
>>>>>>>>> >     Menno
>>>>>>>>> >
>>>>>>>>> >     On 10-7-2018 14:34, 胡志强 wrote:
>>>>>>>>> >      > Dear sumo-users:
>>>>>>>>> >      >          I am doing a traffic light program to optimize
>>>>>>>>> the
>>>>>>>>> >     timing of
>>>>>>>>> >      > traffic light by using Traci.But I met a problem,I need to
>>>>>>>>> >     simulate the
>>>>>>>>> >      > process again and again,then,I got this error:
>>>>>>>>> >      >
>>>>>>>>> >      > Could not connect to TraCI server at localhost:55141
>>>>>>>>> [Errno 111]
>>>>>>>>> >      > Connection refused
>>>>>>>>> >      >   Retrying in 2 seconds
>>>>>>>>> >      > Could not connect to TraCI server at localhost:55141
>>>>>>>>> [Errno 111]
>>>>>>>>> >      > Connection refused
>>>>>>>>> >      >   Retrying in 3 seconds
>>>>>>>>> >      > Could not connect to TraCI server at localhost:55141
>>>>>>>>> [Errno 111]
>>>>>>>>> >      > Connection refused
>>>>>>>>> >      >   Retrying in 4 seconds
>>>>>>>>> >      > Could not connect to TraCI server at localhost:55141
>>>>>>>>> [Errno 111]
>>>>>>>>> >      > Connection refused
>>>>>>>>> >      >   Retrying in 5 seconds
>>>>>>>>> >      > Could not connect to TraCI server at localhost:55141
>>>>>>>>> [Errno 111]
>>>>>>>>> >      > Connection refused
>>>>>>>>> >      >   Retrying in 6 seconds
>>>>>>>>> >      > Could not connect to TraCI server at localhost:55141
>>>>>>>>> [Errno 111]
>>>>>>>>> >      > Connection refused
>>>>>>>>> >      >   Retrying in 7 seconds
>>>>>>>>> >      > Could not connect to TraCI server at localhost:55141
>>>>>>>>> [Errno 111]
>>>>>>>>> >      > Connection refused
>>>>>>>>> >      >   Retrying in 8 seconds
>>>>>>>>> >      > Could not connect to TraCI server at localhost:55141
>>>>>>>>> [Errno 111]
>>>>>>>>> >      > Connection refused
>>>>>>>>> >      >   Retrying in 9 seconds
>>>>>>>>> >      > Could not connect to TraCI server at localhost:55141
>>>>>>>>> [Errno 111]
>>>>>>>>> >      > Connection refused
>>>>>>>>> >      >   Retrying in 10 seconds
>>>>>>>>> >      > Could not connect to TraCI server at localhost:55141
>>>>>>>>> [Errno 111]
>>>>>>>>> >      > Connection refused
>>>>>>>>> >      > Traceback (most recent call last):
>>>>>>>>> >      >    File "main.py", line 78, in <module>
>>>>>>>>> >      >      train(RL_natural)
>>>>>>>>> >      >    File "main.py", line 26, in train
>>>>>>>>> >      >      observation = env.reset()
>>>>>>>>> >      >    File
>>>>>>>>> >      >
>>>>>>>>> >
>>>>>>>>>  
>>>>>>>>> "/home/huzhiqiang/traffic-signal-control/traci_tls_PER_8s_lr0.00025/trafficlight_env.py",
>>>>>>>>> >
>>>>>>>>> >      > line 110, in reset
>>>>>>>>> >      >      "--tripinfo-output", "tripinfo.xml"])
>>>>>>>>> >      >    File "/home/huzhiqiang/sumo/tools/traci/__init__.py",
>>>>>>>>> line 86,
>>>>>>>>> >     in start
>>>>>>>>> >      >      _connections[label] = connect(port, numRetries,
>>>>>>>>> "localhost",
>>>>>>>>> >      > sumoProcess)
>>>>>>>>> >      >    File "/home/huzhiqiang/sumo/tools/traci/__init__.py",
>>>>>>>>> line 64,
>>>>>>>>> >     in connect
>>>>>>>>> >      >      raise FatalTraCIError("Could not connect in %s
>>>>>>>>> tries" %
>>>>>>>>> >     (numRetries
>>>>>>>>> >      > + 1))
>>>>>>>>> >      > traci.exceptions.FatalTraCIError: Could not connect in 11
>>>>>>>>> tries
>>>>>>>>> >      >
>>>>>>>>> >      > How can I fix it?
>>>>>>>>> >      >
>>>>>>>>> >      > Best regards,
>>>>>>>>> >      > Zhiqiang
>>>>>>>>> >      >
>>>>>>>>> >      >
>>>>>>>>> >      >
>>>>>>>>> >      > _______________________________________________
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