[reSIProcate] Sometimes sip stack looses outgoing messages before shutting down.

[Scott Godin]

Looks like your shutdown order isn't quite correct.  Take a look at how
shutdown works in the basicClient example in dum/test directory.  Some
other information on shutting down Dum itself is here:
https://www.resiprocate.org/DUM_Application_Shutdown

Basically you should shut DUM down entirely first, then only shutdown the
stack after dum is shutdown.

Scott


On Fri, Jun 13, 2014 at 3:38 AM, palladin <p-aladin at yandex.ru> wrote:

> Dear resip devels,
> resiprocate 1.9.2
>
> Could you please advise with small issue?
>
> There is an application with the next architecture:
> -main thread,which processes start,stop,signals.
> -DUM thread.
> -all other SipStack stuff.
>
> When application is shutting down it makes next steps:
> -sends a few "final messages",using resip::ServerSubscriptionHandle.
> -resip::EventStackThread::shutdown
> -SipStack::shutdownAndJoinThreads
> -DumThread::shutdown
> -joins all threads above.
>
> Sometimes,described above, "final message" does not leave SipStack. I can
> observe in application log message: TransportSelector.cxx:1185:Transmitting
> to [ ... ], but SipMessage does not leave Transport. Tcpdump points that
> given message did not pass through the network interface.
> I can assume only, that SipMessage was inserted into
> InternalTransport::mTxFifo after call to TransportSelectorThread::shutdown
> and UdpTreansport did not updated FdPollGrp.
>
> Could you please advise, if there is any sense to run post shutdown
> iteration inside TransportSelectorThread? For example:
> --- a/resip/stack/TransportSelectorThread.hxx
> +++ b/resip/stack/TransportSelectorThread.hxx
> @@ -42,6 +42,9 @@ class TransportSelectorThread : public ThreadIf
>                 ErrLog(<< "Unhandled exception: " << e);
>              }
>           }
> +
> +        mSelector.process();
> +        mPollGrp->waitAndProcess(25);
>        }
>
> Or there might be more accurate steps to shutdown SipStack and to send all
> outgoing stuff?
>
> Sincerely,tez.
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>
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