[mythtv-commits] Ticket #8642: Multiple mythbackends in CPU Queue that never exit

[MythTV]

#8642: Multiple mythbackends in CPU Queue that never exit
-----------------------------------------------------+----------------------
 Reporter:  Ken Emerson <kenneth.emerson@…>          |       Owner:  ijr       
     Type:  defect                                   |      Status:  new       
 Priority:  minor                                    |   Milestone:  unknown   
Component:  MythTV - General                         |     Version:  Trunk Head
 Severity:  medium                                   |     Mlocked:  0         
-----------------------------------------------------+----------------------
 I have noticed recently that there are many instances of mythbackend in
 the CPU queue and the number continues to climb over time. I attached to a
 couple of the processes and they seem to be stuck at the same place.
 Traceback below as well as snapshot of CPUQ.

 Please attach all output as a file in bug reports.
 MythTV Version   : 25260
 MythTV Branch    : trunk
 Network Protocol : 57
 Library API      : 0.23.20100701-1
 QT Version       : 4.5.2
 Options compiled in:
  linux debug using_oss using_alsa using_backend using_directfb using_dvb
 using_firewire using_frontend using_hdhomerun using_hdpvr using_iptv
 using_ivtv using_joystick_menu using_libfftw3 using_lirc using_mheg
 using_opengl_video using_opengl_vsync using_qtdbus using_qtwebkit
 using_v4l using_x11 using_xrandr using_xv using_xvmc using_xvmc_vld
 using_xvmcw using_bindings_perl using_bindings_python using_opengl
 using_vdpau using_ffmpeg_threads using_live using_mheg

 F S   UID   PID  PPID  C PRI  NI ADDR SZ WCHAN  TTY          TIME CMD

 0 S  1001  2055  2054  0  89   9 - 26125 futex_ ?        00:00:00
 mythbackend

 0 S  1001  2102  2101  0  89   9 - 26117 futex_ ?        00:00:00
 mythbackend

 0 S  1001  2117  2116  0  89   9 - 26117 futex_ ?        00:00:00
 mythbackend

 0 S  1001  6720  6719  0  89   9 - 26117 futex_ ?        00:00:00
 mythbackend

 0 S  1001  9541  9516  7  80   0 - 139591 poll_s ?       00:33:32
 mythfrontend

 1 Z  1001  9775  9541  0  80   0 -     0 exit   ?        00:00:00
 mythfrontend <defunct>

 1 Z  1001  9776  9541  0  80   0 -     0 exit   ?        00:00:00
 mythfrontend <defunct>

 1 Z  1001  9778  9541  0  80   0 -     0 exit   ?        00:00:00
 mythfrontend <defunct>

 1 Z  1001  9779  9541  0  80   0 -     0 exit   ?        00:00:00
 mythfrontend <defunct>

 1 S  1001 23651     1  0  80   0 - 95035 poll_s ?        00:02:32
 mythbackend

 0 S  1001 29079 29078  0  89   9 - 26117 futex_ ?        00:00:00
 mythbackend

 0 S  1001 32275 32268  0  89   9 - 26117 futex_ ?        00:00:00
 mythbackend



 #0  0x00e83422 in __kernel_vsyscall ()
 #1  0x02896e15 in pthread_cond_wait@@GLIBC_2.3.2 () from
 /lib/tls/i686/cmov/libpthread.so.0
 #2  0x047ebe67 in QWaitCondition::wait(QMutex*, unsigned long) () from
 /usr/lib/libQtCore.so.4
 #3  0x047eaec9 in QThread::wait(unsigned long) () from
 /usr/lib/libQtCore.so.4
 #4  0x058576ee in ~WorkerThread (this=0x8b76ea0, __in_chrg=<value
 optimized out>) at threadpool.cpp:180
 #5  0x0585d020 in ~HttpWorkerThread (this=0x8b76ea0, __in_chrg=<value
 optimized out>) at httpserver.cpp:219
 #6  0x05858999 in ~ThreadPool (this=0x8b75378, __in_chrg=<value optimized
 out>) at threadpool.cpp:328
 #7  0x0585c7a9 in ~HttpServer (this=0x8b75370, __in_chrg=<value optimized
 out>) at httpserver.cpp:100
 #8  0x0179f3ee in MythContextPrivate::DeleteUPnP (this=0x8b74068) at
 mythcontext.cpp:936
 #9  0x0179eef8 in MythContextPrivate::InitUPnP (this=0x8b74068) at
 mythcontext.cpp:899
 #10 0x017a17a6 in MythContextPrivate::DefaultUPnP (this=0x8b74068,
 error=...) at mythcontext.cpp:1130
 #11 0x01798f29 in MythContextPrivate::FindDatabase (this=0x8b74068,
 prompt=false, noPrompt=false)
     at mythcontext.cpp:359
 #12 0x01798df2 in MythContextPrivate::Init (this=0x8b74068, gui=false,
 UPnPclient=0x0, promptForBackend=false,
     noPrompt=false, ignoreDB=false) at mythcontext.cpp:303
 #13 0x017a4649 in MythContext::Init (this=0x8b73bd0, gui=false,
 UPnPclient=0x0, promptForBackend=false,
     disableAutoDiscovery=false, ignoreDB=false) at mythcontext.cpp:1388
 #14 0x0815bcd0 in setup_context (cmdline=...) at main_helpers.cpp:230
 #15 0x08098270 in main (argc=7, argv=0xbfb31b84) at main.cpp:187

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Ticket URL: <http://svn.mythtv.org/trac/ticket/8642>
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