[Bug 771983] New: Deadlock when closing session and backlog is full.

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=771983

            Bug ID: 771983
           Summary: Deadlock when closing session and backlog is full.
    Classification: Platform
           Product: GStreamer
           Version: unspecified
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-rtsp-server
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: goran.jonsson at axis.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 336252
  --> https://bugzilla.gnome.org/attachment.cgi?id=336252&action=edit
gst-rtsp-server patch

Basic: 
The fix for https://bugzilla.gnome.org/show_bug.cgi?id=736647
( rtsp-client: Allow backlog to grow while expiring session )
is not working after https://bugzilla.gnome.org/show_bug.cgi?id=737690.

How to reproduce: Set drop_backlog = FALSE and use rtp tunneled over TCP
or HTTP and stream. Then suspend client or remove connection to client.

What happens: When session times out the media state is not set null
when backlog is allowed to grow. This will cause deadlock.

Please not that cleanup_session never will  be called since this is 
called when watch is destroyed and in this case all block because it's 
not possible to write to watch:s backlog.

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