Subject: Re: [boost] [ASIO] Issue with epoll reactor? Callback handler not executed.
From: Brad Higgins (bhiggins_at_[hidden])
Date: 2013-05-25 09:08:14
Hi Arpan,
Read Marat's response again. The likely issue here is not epoll or asio, but rather with your code trying to use composed operations like async_write() and async_read_until() with io_service.run_one().
>
> 4. Marat's code is using io_service.run - why should I not be using
> run_one?
run_one() will run until the io_service is stopped (and return 0), or until at most 1 completion handler is called (and return 1). As Marat notes, async_read_until() is a composed operation - it may result in multiple async_read_some() operations internally, each with their own completion handler. Since you use run_one(), you haven't allowed async_read_until() to complete in cases in which it needs to call multiple internal handlers.
>
> Any thoughts on debugging or setting epoll options from asio interface to
> see what is going on?
Use io_service.run(). You can check its return value to see how many handlers it called.
Thanks,
Brad