see https://github.com/eclipse/sumo/issues/12773 for background and
work-around.
Note, that you can catch the exception since it isn't fatal:
try:
traci.vehicle.changeTarget(vehicle, "E20")
except traci.TraCIException:
....
Am Mo., 6. März 2023 um 10:16 Uhr schrieb Ching, Jia Chin <
[email protected]>:
> Bug Description:
>
> Traci returning wrong edge when vehicle is near junction.
>
>
>
> Sumo Version: 1.15.0
>
> OS: Windows 10, 64-bit operating system, x64-based processor
>
>
>
> Error Screenshot:
>
> *Full Traci Screenshot Included inside zip file*
>
>
>
>
>
> Error Message:
>
> ***Starting server on port 58726 ***
>
> Loading net-file from './config/CargoReroute2.net.xml' ... done (24ms).
>
> Loading done.
>
> Warning: Value of tau=1.00 in vehicle type 'p_0' lower than simulation
> step size may cause collisions.
>
> Simulation started with time: 0.00.
>
> Warning: No connection between edge 'E18' and edge 'E20' found.
>
> Warning: No route for vehicle 'car_0.0' found.
>
> Error: Answered with error to command 0xc4: Route replacement failed for
> vehicle 'car_0.0' (No route found).
>
> Error: tcpip::Socket::recvAndCheck @ recv: peer shutdown
>
> Quitting (on error).
>
>
>
> Description:
>
> Goal: We wish to dynamically assign counters(edges E16, E18
> or E20) inside SUMO using TraCI. Counter assignment logic defers depending
> on use case.
>
> Bug: If vehicle is near the junction(node) where
> counters(edges) are assigned, Traci would say the vehicle is still before
> the junction despite the vehicle already entered the next edge.
>
>
>
> Snapshots: (Full screenshot in zip file)
>
>
>
> Python code breakdown:
>
> 1. For every step in TraCI:
> 2. Retrieve list of all vehicles on edge(E15) before junction.
> 3. Assign them a new counter depending on current conditions on
> current time stamp. In the sample code in zip file, we are just assigning
> between the 3 edges sequentially.
>
>
>
> Steps to reproduce bug;
>
> 1. Download and unzip zip file
> 2. Run main.py
>
>
>
> Debugging already done by us:
>
> 1. We have confirmed that the vehicle is in the correct edge (E15,
> before junction). Afterwards, we assign a new counter(edge E16, E18 or E20)
> to the vehicle.
>
> This can be seen in the cmd output below: (Note that the python code
> crashed after calling traci. simulationStep)
>
>
>
>
> 1. We have confirmed that all edges can be reached by assigning new
> targets. Traci.vehicle.changetarget is working as intended.
>
> Change target to E16:
>
> Change target to E18:
>
> Change target to E20:
>
>
> 1. This behaviour is inconsistent. There are times when it resolves
> itself if we redraw the nodes and edges.
>
>
>
>
>
> PS: Thanks for reading and I look forward to your response.
>
>
>
> Best Regards,
>
> JiaChin Ching
>
> Full Stack Engineer
>
>
>
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