[mythtv-commits] Ticket #4921: When attempting to change channel MySQL crashes

[MythTV]

#4921: When attempting to change channel MySQL crashes
-----------------------+----------------------------------------------------
 Reporter:  anonymous  |       Owner:  ijr       
     Type:  defect     |      Status:  new       
 Priority:  minor      |   Milestone:  unknown   
Component:  mythtv     |     Version:  0.21-fixes
 Severity:  medium     |     Mlocked:  0         
-----------------------+----------------------------------------------------
 MythTV Version   : 16495
 MythTV Branch    : branches/release-0-21-fixes
 Library API      : 0.21.20080304-1
 Network Protocol : 40
 Options compiled in:
  linux release using_oss using_alsa using_backend using_dbox2
 using_directfb using_dvb using_firewire using_frontend using_hdhomerun
 using_iptv using_ivtv using_joystick_menu using_lirc using_v4l using_x11
 using_xrandr using_xv using_xvmc using_xvmcw using_xvmc_vld
 using_bindings_perl using_bindings_python using_opengl
 using_ffmpeg_threads using_libavc_5_3 using_live

 errors at time of losing mysql:

 2008-03-10 22:51:57.819 MSqlQuery: SELECT title,     subtitle,
 description, category,        starttime, endtime,  callsign,    icon,
 channum,   seriesid, programid FROM program, channel WHERE program.chanid
 = channel.chanid AND       channel.chanid = 2082        AND
 starttime <= '2008-03-10T22:51:57' ORDER BY starttime desc LIMIT 1
 2008-03-10 22:51:57.819 DB Error (GetNextProgram -- get program info):
 Query was:
 SELECT title,     subtitle, description, category,        starttime,
 endtime,  callsign,    icon,            channum,   seriesid, programid
 FROM program, channel WHERE program.chanid = channel.chanid AND
 channel.chanid = 2082        AND       starttime <= '2008-03-10T22:51:57'
 ORDER BY starttime desc LIMIT 1
 Driver error was [2/2013]:
 QMYSQL3: Unable to execute query
 Database error was:
 Lost connection to MySQL server during query

 2008-03-10 22:51:57.820 MSqlQuery: SELECT channum, callsign, icon FROM
 channel WHERE chanid = 2082
 2008-03-10 22:51:57.820 DB Error (GetNextProgram -- get channel info):
 Query was:
 SELECT channum, callsign, icon FROM channel WHERE chanid = 2082
 Driver error was [2/2006]:
 QMYSQL3: Unable to execute query
 Database error was:
 MySQL server has gone away


 MYSQL Log:

 080310 22:51:57 - mysqld got signal 11;
 This could be because you hit a bug. It is also possible that this binary
 or one of the libraries it was linked against is corrupt, improperly
 built,
 or misconfigured. This error can also be caused by malfunctioning
 hardware.
 We will try our best to scrape up some info that will hopefully help
 diagnose
 the problem, but since we have already crashed, something is definitely
 wrong
 and this may fail.


 key_buffer_size=16777216
 read_buffer_size=258048
 max_used_connections=9
 max_connections=100
 threads_connected=7
 It is possible that mysqld could use up to
 key_buffer_size + (read_buffer_size + sort_buffer_size)*max_connections =
 3318383 K
 bytes of memory
 Hope that's ok; if not, decrease some variables in the equation.


 thd=0x24292e0
 Attempting backtrace. You can use the following information to find out
 where mysqld died. If you see no messages after this, something went
 terribly wrong...
 Cannot determine thread, fp=0x4414bfe0, backtrace may not be correct.

 Stack range sanity check OK, backtrace follows:
 (nil)
 New value of fp=0x24292e0 failed sanity check, terminating stack trace!
 Please read http://dev.mysql.com/doc/mysql/en/using-stack-trace.html and
 follow instructions on how to resolve the stack trace. Resolved
 stack trace is much more helpful in diagnosing the problem, so please do
 resolve it
 Trying to get some variables.

 Some pointers may be invalid and cause the dump to abort...
 thd->query at 0x262b450 = SELECT title,     subtitle, description,
 category,        starttime, endtime,  callsign,    icon,
 channum,   seriesid, programid FROM program, channel WHERE program.chanid
 = channel.chanid AND       channel.chanid = 2082        AND
 starttime <= '2008-03-10T22:51:57' ORDER BY starttime desc LIMIT 1

 thd->thread_id=12
 The manual page at http://www.mysql.com/doc/en/Crashing.html contains
 information that should help you find out what is causing the crash.


 Please let me know what other diags. would be helpful.

 Thanks!

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/4921>
MythTV <http://svn.mythtv.org/trac>
MythTV