[Freeswitch-dev] FreeSWITCH Windows Crash due to Detached Threads (and solution)

[Anthony Minessale]

Saying that we are ignoring an issue, considering the workload we have, is
not the best way to open a conversation.
If you are willing to work on this issue and volunteer your time and efforts
to get a more long term solution. please contact us.


On Sun, Feb 15, 2009 at 11:30 AM, Giovanni Maruzzelli
<gmaruzz at celliax.org>wrote:

> Hi Ron,
>
> don't know if it's always like that, but I can confirm I had to use
> joinable thread for Skypiax to have a reliable "killability" without
> crashes on Windows (on the Debug build, not cheked on Release).
>
> Sincerely,
>
> Giovanni Maruzzelli
> =========================================
> www.celliax.org
> via Pierlombardo 9, 20135 Milano
> Italy
> gmaruzz at celliax dot org
> Cell : +39-347-2665618
> Fax : +39-02-87390039
>
>
>
>
> On Sun, Feb 15, 2009 at 3:49 PM, Ron Avriel <ravriel_1 at yahoo.com> wrote:
> > Hi,
> >
> > Under Windows, FreeSWITCH consistently crashes with all default install
> > setting after issuing the 'shutdown'
> > command from console immediately after startup, without a single call
> > handled.
> > Note that on my servers, this only happens in 'Release' version, not in
> > 'Debug'.
> >
> > The problem is due to "problematic" Windows thread handling.
> > I noticed that all FS threads are 'detachable' and not 'joinable'. When
> an
> > application with active detached threads terminates, a race condition can
> > lead to the application crash, as shown in the sample application
> > at http://pastebin.freeswitch.org/7225 .
> >
> > This is exactly what causes FS to crash as a result of the
> mod_event_socket
> > detached runtime thread.
> >
> > A temporary workaround is to change in switch_loadable_module_exec() the
> > call to
> > switch_yield(1000000) with switch_thread_exit(thread, 0).
> >
> > In my case it solved the crash, but theoretically it does not always
> solve
> > the problem, because there is no
> > guarantee that it will get called before the main thread reaches its
> > termination code.
> >
> > I think the only safe solution is to use 'joinable' threads. Is there a
> good
> > reason they're not used?
> >
> > Note – this problem was reported to jira about a month ago
> > http://jira.freeswitch.org/browse/MODEVENT-37 but it seems it was
> ignored.
> >
> > Thanks,
> > Ron
> >
> >
> >
> > _______________________________________________
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> >
> >
>
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-- 
Anthony Minessale II

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