[Bug 737631] New: gst-rtsp-server deadlock while sending response over TCP

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=737631
  GStreamer | gst-rtsp-server | git

           Summary: gst-rtsp-server deadlock while sending response over
                    TCP
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-rtsp-server
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: sebras at hotmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


We have discovered another deadlock in gst-rtsp-server when streaming over TCP.
The deadlock occurs when the backlog is full and the appsink element is
attempting to send data resulting the streaming thread blocking while holding
the send lock. At the same time the RTSP client thread is receving a request
requring a response, which can not be sent successfully because the send lock
is already taken. In this situation the backlog can never be emptied because it
is the same thread receving RTSP requests that is already blocked sending the
response (since both sources are attached to the same mainloop).

This has previously been discussed at #gstreamer with wtay.

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