Re: troubleshooting unresponsive pyro processes

On Thu, Jan 17, 2013 at 6:00 PM, Irmen de Jong <[email protected]> wrote:

> Hi Tom,
>
> On 17-1-2013 19:25, Tom Smith wrote:
> > When I augment this code to run inside a Pyro server process, things get
> flaky.  (I am
> > currently using the multiplex server in order to narrow down the
> possibilities.)
> >  Initial connections from a Pyro client may work fine, but within a few
> tries, both the
> > client and server process will become unresponsive (cannot ^C).  The
> pattern *seems* to
> > be that this occurs after the domain class has done some network I/O,
> and then a Pyro
> > client connects.  (Connections from a Pyro client before the network I/O
> seem to work
> > better, though maybe not 100%).
>
> What exactly do you mean by "cannot ^C"?  Could it not be that Python is
> not responding
> to the ^C simply because there is a signal handler installed, or a
> background thread
> that eats the signal?
> Is Pyro still responding to remote method calls? Is your domain class
> still responding
> to socket communication?
>

Sorry, I left out this important part.  Pyro stops responding to remote
method calls (the
client blocks).  At this point, the server cannot be stopped with ^C.

>
> > Any ideas on what I should try next?
>
> Hmm. What happens when you use the normal threadpool server? What happens
> when you stub
> out your domain class code?  Is that C extension doing something weird with
> signals/threads/eventloops/socketconfiguration?   Is it running its own
> eventloop that
> blocks execution of Pyro?


Normal threadpool server shows the same behavior.  When the domain class is
not doing its
network I/O, then everything works beautifully.  The fact that the library
I am using for
the network I/O (pjsip) spawns its own worker thread leads me to believe
that it should
not interfere with Pyro execution.  And that seems to be supported by the
thread state
that I see.

That being said, it does seems like some interaction with pjsip, since this
only occurs after
pjsip has handled a call (but not 100% of the time).  Strange...

>
>
Regards,
> Irmen.
>
> Thanks for your thoughts,
Tom

>
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