Indeed, it crashed:
sumoD: MSVehicle.cpp:2114: void MSVehicle::updateBestLanes(bool, const
MSLane*): Assertion `false' failed.
Program received signal SIGABRT, Aborted.
Ultimate source of the problem is at my end: I am feeding sumo bad data.
Made changes in scenario and will have to regenerate the routes as well.
I have written short patch, it is attached. It responds 0xc4 (error) to
TraCI client instead of crashing.
I have one more problem to deal with: when adding vehicles via TraCI the
command sometimes failes because the position where the vehicle goes to
is occupied by other vehicle at that moment. How can I detect it from traci?
Thanks,
Matej.
On 26.4.2016 08:33, Jakob Erdmann wrote:
It sounds a bit like SUMO crashing since it should not disconnect by
itself. You could try running the debug version to investigate this
possibility.
2016-04-25 8:49 GMT+02:00 Matěj Kubička
<[email protected]
<mailto:[email protected]>>:
The exit() was just to point out how this problem happens. I must
have an imp in my toolchain as it misbehaves lately - it seem that
after the call to saveState() I sometimes manage to crash SUMO (or
Traci) in such a way that it won't raise exception. Only in the
next call I get the "SUMO disconnected" exception. As a by product
those buffers won't get flushed (or so it seems). I am not sure
what exactly is going on in here, but it might very well be that
the problem is on my end..
Thanks for the response,
Matej.
On 25.4.2016 08:16, Jakob Erdmann wrote:
Hello,
saving should be finished but I suspect that the final write
buffer was not flushed.
Always call traci.close() before calling exit(). This shuts down
SUMO in an ordered fashion and allows all buffers to be flushed.
regards,
Jakob
2016-04-25 3:18 GMT+02:00 Matěj Kubička
<[email protected]>:
Hello,
is it possible that call to Connection.simulation.saveState()
returns
before the state is fully saved? Following call will leave
invalid
statefile :
proc = subprocess.Popen(['sumo' ...])
tad = traci.connect(self.port))
tad.simulation.saveState(self.state_fname)
exit()
Note the exit() call right after the call to saveState().
Since python
forks SUMO this call will kill SUMO too. If I try to open the
statefile
later SUMO itself complaints:
Error: input ended before all started tags were ended; last
tag started
is 'snapshot'
In file '/tmp/sumo-state-55001.xml'
At line/column 75447/5.
Best,
Matej.
On 15.3.2016 12:55, Jakob Erdmann wrote:
> Hello,
> traci now supports saving simulation state (although not
quite as in the
> patch).
> See http://sumo.dlr.de/wiki/TraCI/Change_Simulation_State
> and http://sumo.dlr.de/trac.wsgi/changeset/20191
> regards,
> Jakob
>
> 2016-03-14 8:14 GMT+01:00 Jakob Erdmann
<[email protected] <mailto:[email protected]>>:
>
>> Thank you very much for the patch. We will integrate this
for 0.26.0 (
>> http://sumo.dlr.de/trac.wsgi/ticket/2191)
>>
>> cheers,
>> Jakob
>>
>> 2016-03-10 1:02 GMT+01:00 Matěj Kubička <[email protected]
<mailto:[email protected]>>:
>>
>>> Hello Jakob,
>>> I cannot use --save-state.xx options as I do not know
beforehand when I
>>> will want to save the state. What I need is to be able to
do it on request
>>> via TraCI.
>>>
>>> I implemented this in SUMO 0.25 (rev 19749), see attached
patch for the
>>> changes. The parts of SUMO I was dealing with were
written quite elegantly
>>> and so the changes are not all that complicated (for
which I am grateful
>>> :-)). It now recognizes TraCI command 0x03 as a request
to save the
>>> simulation state. I invoke it from python simply as
>>>
>>> def saveState(self, filename):
>>> self._beginMessage(0x03, 0, filename)
>>> self._sendExact()
>>>
>>> Can you make similar functionality part of mainstream
SUMO/TraCI? It
>>> would simplify things for me.
>>>
>>> Thank you,
>>> Matej.
>>>
>>
>
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