[mythtv-commits] Ticket #986: mythbackend 8554 freeze/crash - AFD Error

[MythTV]

#986: mythbackend 8554 freeze/crash - AFD Error
-----------------------+----------------------------------------------------
 Reporter:  anonymous  |        Owner:  ijr    
     Type:  defect     |       Status:  closed 
 Priority:  minor      |    Milestone:  unknown
Component:  mythtv     |      Version:  head   
 Severity:  medium     |   Resolution:  invalid
-----------------------+----------------------------------------------------
Comment (by oa at iki.fi):

 I don't see the frontend crashes that much any more, but mythtranscode is
 eating plenty of memory in the same circumstances (errors in the source
 file). I checked under a debugger, and most of the time seems to be spent
 copying audio data around:

 (gdb) info threads
   3 Thread 25385904 (LWP 4239)  0x00e34402 in __kernel_vsyscall ()
   2 Thread 68516784 (LWP 4240)  0x00e34402 in __kernel_vsyscall ()
   1 Thread -1208583680 (LWP 4233)  0x4f6c586c in memcpy () from
 /lib/libc.so.6
 (gdb) thread 1
 [Switching to thread 1 (Thread -1208583680 (LWP 4233))]#0  0x4f6c586c in
 memcpy
     () from /lib/libc.so.6
 (gdb) bt
 #0  0x4f6c586c in memcpy () from /lib/libc.so.6
 #1  0x0805fcaa in AudioOutput::SetSourceBitrate ()
 #2  0x4393a7be in NuppelVideoPlayer::AddAudioData ()
    from /usr/lib/libmythtv-0.19.so.0
 #3  0x43977036 in AvFormatDecoder::GetFrame ()
    from /usr/lib/libmythtv-0.19.so.0
 #4  0x4394928f in NuppelVideoPlayer::TranscodeGetNextFrame ()
    from /usr/lib/libmythtv-0.19.so.0
 #5  0x08057153 in QValueList<QString>::detachInternal ()
 #6  0x08050ebb in ?? ()
 #7  0x4f66ed5f in __libc_start_main () from /lib/libc.so.6
 #8  0x0804e795 in ?? ()
 (gdb) thread 2
 [Switching to thread 2 (Thread 68516784 (LWP 4240))]#0  0x00e34402 in
 __kernel_vsyscall ()
 (gdb) bt
 #0  0x00e34402 in __kernel_vsyscall ()
 #1  0x4f8a4a1c in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib/libpthread.so.0
 #2  0x4200c407 in QWaitCondition::wait ()
    from /usr/lib/qt-3.3/lib/libqt-mt.so.3
 #3  0x437b15a2 in ThreadedFileWriter::SyncLoop ()
    from /usr/lib/libmythtv-0.19.so.0
 #4  0x437b15d1 in ThreadedFileWriter::boot_syncer ()
    from /usr/lib/libmythtv-0.19.so.0
 #5  0x4f8a2b80 in start_thread () from /lib/libpthread.so.0
 #6  0x4f7249ce in clone () from /lib/libc.so.6
 (gdb) thread 3
 [Switching to thread 3 (Thread 25385904 (LWP 4239))]#0  0x00e34402 in
 __kernel_vsyscall ()
 (gdb) bt
 #0  0x00e34402 in __kernel_vsyscall ()
 #1  0x4f8a4a1c in pthread_cond_timedwait@@GLIBC_2.3.2 ()
    from /lib/libpthread.so.0
 #2  0x4200c407 in QWaitCondition::wait ()
    from /usr/lib/qt-3.3/lib/libqt-mt.so.3
 #3  0x437b2932 in ThreadedFileWriter::DiskLoop ()
    from /usr/lib/libmythtv-0.19.so.0
 #4  0x437b2a21 in ThreadedFileWriter::boot_writer ()
    from /usr/lib/libmythtv-0.19.so.0
 #5  0x4f8a2b80 in start_thread () from /lib/libpthread.so.0
 #6  0x4f7249ce in clone () from /lib/libc.so.6

 I stopped the program about a dozen times, and most times its stack trace
 indicated the same memcpy() routine.

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Ticket URL: <http://svn.mythtv.org/trac/ticket/986>
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