[issue28212] Closing server in asyncio is not efficient

[Константин Волков]

Константин Волков added the comment:

Thats not a thing I talking about. But thanks for "wait_closed", I will be
use it in future )

Im talking about reading tasks.When reader removed from selector, there is
reading task for it. Loop do "cancel" for it, but it not really cancelling
task. Its only marking task for be cancelled on next loop step. It must
raise Cancel exception, so task may do corresponding actions inside it (for
exemple try..except Cancel). But it will not happen, because there will be
no next step - task removed from selector and now is missed from loop. It
will freese in "cancelling" state forever if protocol implementation
wouldn`t take care about it itself. Some protocol implementations make
"_step" for such tasks manually to loop them for correct finishing, someone
makes "set_result(None)", but its all looks bad.
Seems it will be better put it in loop after removing from selector, so it
will go "cancelling way" itself as every task do.

2016-09-20 17:50 GMT+03:00 R. David Murray <report at bugs.python.org>:

>
> R. David Murray added the comment:
>
> You have to call wait_closed to complete the shutdown.
>
> This should probably be mentioned directly in the socket server docs (at
> least in the examples) (assuming I'm not wrong...but I'm pretty sure I'm
> right) rather than by implicit reference to Server via the create_server
> comment.
>
> ----------
> assignee:  -> docs at python
> components: +Documentation
> nosy: +docs at python, r.david.murray
>
> _______________________________________
> Python tracker <report at bugs.python.org>
> <http://bugs.python.org/issue28212>
> _______________________________________
>

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<http://bugs.python.org/issue28212>
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