[reSIProcate] dum leaks dialogs and dialogsets on shutdown

[Daniel Tacalau]

Hi,

In the scenario below, when dum is shutdown gracefully with
dum.shutdown(&_shutdownHandler), it waits indefinitely in shutdown - from
logs there are some AppDialog and AppDialogSet which are not destroyed. Not
sure what's the problem. Shutdown does not block if I use forced method
_dum.forceShutdown(&_shutdownHandler);

Here's the scenario:

I use DUM as a subscribe client to fetch state from phones by sending
SUBSCRIBE requests with Expires 0. Phone replies back with 200 OK and
NOTIFY, but proxy reverse the sequence and sends to DUM the NOTIFY followed
by 200OK. The leaked Dialogs and DialogSets are created by DUM when it
receives the 200OK.

I've attached logs.

2014-03-04T14:34:28.747357Z:6273:SIP:DEBUG:dtacalau-laptop.dev-ezuce.ro::7f658e604700:sipxsss:DEBUG
| 20140304-163428.747 |  | RESIP:DUM | 140074157098752 |
HandleManager.cxx:51 | 14 -> AppDialog 14
2014-03-04T14:34:28.747493Z:6275:SIP:DEBUG:dtacalau-laptop.dev-ezuce.ro::7f658e604700:sipxsss:DEBUG
| 20140304-163428.747 |  | RESIP:DUM | 140074157098752 |
HandleManager.cxx:51 | 3 -> AppDialogSet 3
2014-03-04T14:34:28.747589Z:6277:SIP:DEBUG:dtacalau-laptop.dev-ezuce.ro::7f658e604700:sipxsss:DEBUG
| 20140304-163428.747 |  | RESIP:DUM | 140074157098752 |
HandleManager.cxx:51 | 4 -> AppDialogSet 4

Could there be anything wrong on my end or could be a bug in DUM? I'd
prefer to shutdown gracefully.

Thanks,
Daniel
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