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 <[email protected]> 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 <[email protected]>:
>
>> 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 <[email protected]> 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 <[email protected]>:
>>>
>>>> Hi,
>>>> Could you please tell me how add the option numTries=100 to
>>>> traci.start()?
>>>>
>>>> Best regards,
>>>> Zhiqiang
>>>>
>>>> Jakob Erdmann <[email protected]> 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 <[email protected]>:
>>>>>
>>>>>> 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 <[email protected]> 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 <[email protected]
>>>>>>> > <mailto:[email protected]>> 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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