Re: [sumo-user] Assorted errors when using threads (1 new simulation per

[Michael Behrisch <oss@xxxxxxxxxxx>]

Hi,
I ran your example here (Python 3.6 on Linux), with the most recent SUMO 
(built today) changing max_workers to 2 and experienced no problems.

Can you give more details on your environment?

Best regards,
Michael

Am 29.04.21 um 15:19 schrieb Marcelo Andrade Rodrigues D Almeida:
> Thank you for your response
>
> See new attached version
>
>
> Sincerely,
>
> Marcelo d'Almeida
>
>
> On Thu, Apr 29, 2021 at 10:12 AM Michael Behrisch <oss@xxxxxxxxxxx 
> <mailto:oss@xxxxxxxxxxx>> wrote:
>
>     Hi,
>     in your example code the synchronization_util is missing. Can you
>     add it
>     and resend the zip?
>
>     Best regards,
>     Michael
>
>     Am 25.04.21 um 22:45 schrieb Marcelo Andrade Rodrigues D Almeida:
>      > Hi everyone
>      >
>      > I'm having trouble using multiple simulations in different threads
>      >
>      > The difference can be perceived by changing max_workers to 1 and 2.
>      > "        with
>     ThreadPoolExecutor(max_workers=len(possible_actions)) as
>      > executor:" (planning_only_agent.py, line 100)
>      >
>      > [See attached example (a very simplified version of what I'm
>     actually
>      > using)]
>      >
>      > With max_workers=1, it works just fine.
>      >
>      > With 2, it gives all sort of errors:
>      >
>      > "bad char in struct format"
>      > "unpack requires a buffer of [x] bytes"
>      > A lot of times it just hangs
>      > "Received answer 0 for command 211."
>      >
>      >
>      > The easiest way I found to reproduce is to add a breakpoint into a
>      > subscribe call and hit continue several times. It is likely to crash
>      > when threads stop at the same command, although it occurs eventually
>      > without breaking points.
>      >
>      > Tested in version 1.9.0 (specifically v1_9_0+0210-fa53508669)
>      >
>      > Thank you in advance
>      >
>      >
>      > Sincerely,
>      >
>      > Marcelo d'Almeida
>      >
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