[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
** Changed in: mythtv Status: Confirmed = Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/330272 Title: mythbackend silently fails with QSqlQuery::exec: empty query To manage notifications about this bug go to: https://bugs.launchpad.net/mythtv/+bug/330272/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Upstream closed this bug, probably with good reason. Haven't heard of this happening in recent versions, and even if we did, it would need to be reproduced and a backtrace caught on a 0.24, and preferrably 0.25 system. If this reoccurs, please open a new ticket. ** Changed in: mythtv (Ubuntu) Status: Triaged = Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/330272 Title: mythbackend silently fails with QSqlQuery::exec: empty query To manage notifications about this bug go to: https://bugs.launchpad.net/mythtv/+bug/330272/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
** Changed in: mythtv Status: New = Confirmed -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
** Changed in: mythtv (Ubuntu) Status: Confirmed = Triaged -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Apport doesn't want to catch this. It says The problem cannot be reported - This is not a genuine ubuntu package I will see if I can get the daily trunk builds going and attach gdb to mythtv-backend. Please be aware that this means the WAF may go through the floor as I iron out other issues I envisage along the way. If I haven't reported back in a week, be concerned. ;) -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Okay, apart from there not being an up-to-date and working minimyth for my diskless VIA frontend (WAF=gone through the floor), a desktop frontend that crashes on channel change (known, confirmed mythtv bug) I am now running trunk with no issues and have gdb attached to the backend. ;) Watch this space -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
This will require some modifications to the package to support trunk daily packages in apport unfortunately. On Thu, Oct 8, 2009 at 07:16, Kelvinelk k...@oddworld.name wrote: Okay, apart from there not being an up-to-date and working minimyth for my diskless VIA frontend (WAF=gone through the floor), a desktop frontend that crashes on channel change (known, confirmed mythtv bug) I am now running trunk with no issues and have gdb attached to the backend. ;) Watch this space -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of MythTV Ubuntu Maintainers, which is subscribed to mythtv in ubuntu. -- Mario Limonciello supe...@gmail.com Sent from Austin, Texas, United States -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Just a quick 'me too'. I'm also in the UK and use the DVB-S and DVB-T EIT exclusively. I've started having this once or twice a day since 2009-10-02, presumably because of something in the current EIT data - running mythbuntu with trunk 22179. -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Does this coincide with the changes to some of the ITV channels that may require a channel re-scan? I have been on holiday so the server has not been running but I read about this while I was away. -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
@MajorTom and FAO MarcRandolph So, looks like this issue affects trunk as well as 0.21-fixes. Perhaps upstream will pay attention to this bug now? @Alistair Yes it does coincide, but I rescanned on Thursday. Have you rescanned or seen the bug occur before or after scanning? -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
I'll make another plea on the mailing lists for ideas on how to debug this further. In the mean time: 1. Please enable apport if you can. don't know if it will help or not 2. The most important thing is to grab logs of the failure on 0.22 systems with -v important,eit,siparser or if you can stand the file size, maybe -all ** Changed in: mythtv (Ubuntu) Status: Incomplete = Confirmed -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Make that -v vbi,important,eit,siparser -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
** Bug watch added: mythtv.org bug tracker #7251 http://svn.mythtv.org/trac/ticket/7251 ** Also affects: mythtv via http://svn.mythtv.org/trac/ticket/7251 Importance: Unknown Status: Unknown -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
** Changed in: mythtv Status: Unknown = New -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
OK, so in theory if you turn on the daily trunk builds rather than the karmic archive builds, you should get more debugging symbols built in. So first thing i'd recommend is visit http://mythbuntu.org/auto-builds and turn those on. Next if mythbackend isn't getting caught by apport, run it through gdb. Follow the directions here: https://wiki.ubuntu.com/Backtrace You'll probably want to still run mythbackend as the user mythtv though, so to become that user, this is the command to do it: $ sudo su mythtv -c bash -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Alternatively (and it might be easier), follow the directions on that page to attach to the already running mythbackend process. -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Well, just as I was starting to forget about this bug, it happened again today! What a shame. -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Mine has now been running fine for 3 days with no errors (it would previously fail within 12 hours of startup). I am NOT using the --nohousekeeper flag. I can only conclude at the moment that whatever wonky EIT data was being received, which triggered the issue, is now no longer being broadcast? Roy -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
@alistair I think it depends on whether myth protocol has changed or not. I have a minimyth frontend which ignores a change in myth protocol and attempts to connect anyway. Other implementations will vary and will likely not enable you to connect if there is a mismatch in the protocol. @all I have now been running for over a week with --nohousekeeper switch added to mythbackend. I have not had one instance of it crashing in this manner (kiss of death!!!) This is unheard of for my setup over the last couple of months or so. -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
After compiling together information and posting to the mythtv-users list, I have received no responses - so I'm afraid that the only course forward is for one of you to either upgrade to alpha 0.22, or do a parallel install (anyone have a spare drive or partition?) to see if the problem is still occurring on 0.22. Here is the note I posted: Howdy all, With 0.22 not far away, a group of users on 0.21 are trying narrow down the cause of a 0.21 EIT related bug they are encountering (I'm just doing the best I can to help them, which is admittedly not much). If you know what to look for and start searching, it is obvious that a number of people have run into this over the past 18 months, and that I can find, none have resolved it: http://www.gossamer-threads.com/lists/mythtv/users/340705 http://www.gossamer-threads.com/lists/mythtv/users/377245 http://www.gossamer-threads.com/lists/mythtv/users/393125 Then we have the three people here: https://bugs.launchpad.net/bugs/330272 This is possibly the same: http://svn.mythtv.org/trac/ticket/4993 (resolution: no problem could be found) As might this be: http://svn.mythtv.org/trac/ticket/5739 What appears to happen is that things run fine for a while (some number of hours), and at some point, QSqlQuery::exec: empty query starts appearing in the mythtvbackend.log. Sometime later, it devolves further into messages about database errors, yet the users have verified that the database is fine, as is the command sent to it. This is a snip of the log file with -v important,eit,siparser: 2009-08-31 17:01:10.587 EITCache: Wrote 1 modified entries of 255 for channel 2734 to database. 2009-08-31 17:01:11.264 EITScanner (1): Now looking for EIT data on multiplex of channel 12 2009-08-31 17:01:11.265 EITCache: Pruning all entries that ended before UTC 2009-08-30T17:06:31 2009-08-31 17:01:11.425 EITCache: Deleting old cache entries from the database 2009-08-31 17:01:11.732 Created PMT Program Map Table ver(20) pid(0x3eb) pnum(1) len(67) Stream #0 pid(0x12d) type(video-mpeg2 0x2) Stream Identifier Descriptor (0x52) length(1) Stream #1 pid(0x12e) type(audio-mp2-layer[1,2,3] 0x4) Stream Identifier Descriptor (0x52) length(1) ISO-639 Language: code(eng) canonical(eng) eng(English) Stream #2 pid(0x130) type(audio-mp2-layer[1,2,3] 0x4) Stream Identifier Descriptor (0x52) length(1) ISO-639 Language: code(eng) canonical(eng) eng(English) Stream #3 pid(0x12f) type(private-data 0x6) Stream Identifier Descriptor (0x52) length(1) Subtitling Descriptor (0x59) length(8) 2009-08-31 17:01:12.187 PESPacket: Failed CRC check 0x22160113 != 0xc3bfa4b5 for StreamID = 0x70 2009-08-31 17:01:12.231 EITScanner (1): Started passive scan. 2009-08-31 17:01:12.678 EITHelper: Added 2 events 2009-08-31 17:01:13.118 EITHelper: Added 2 events 2009-08-31 17:01:13.186 PESPacket: Failed CRC check 0x22160114 != 0xc3bfa4b5 for StreamID = 0x70 2009-08-31 17:01:13.590 EITHelper: Added 3 events 2009-08-31 17:01:14.038 EITHelper: Added 3 events QSqlQuery::exec: empty query QSqlQuery::exec: empty query this goes on for a long while, along with other EIT related log messages, until finally the empty queries give way to the dreaded DB Error event occurs at a seemingly random spot (because the DB Error varies across users): QSqlQuery::exec: empty query QSqlQuery::exec: empty query QSqlQuery::exec: empty query 222-22MM-22dd 22hh:22mm:22ss.22zzz DB Error (Update next_record): The actual DB Error varies... Looking up chanID is another favorite. More complete logs are available on the launchpad bug referenced above. As I mentioned, users have verified that the database is fine, as is the command sent to it. The corrupted date causes me to suspect there is no database error at all, but rather a corruption (bogus pointer?) occurring within the EIT code that manages to stomp on unrelated things. 1. Anyone have any other ideas on how to narrow this down further, or what might be causing it? 2. Any guesses if it is fixed in 0.22 (i.e., has anyone that had this error in 0.21 already moved to 0.22 and seen it go away)? Thank you! Marc ** Bug watch added: mythtv.org bug tracker #4993 http://svn.mythtv.org/trac/ticket/4993 ** Bug watch added: mythtv.org bug tracker #5739 http://svn.mythtv.org/trac/ticket/5739 -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
If I upgrade the backend, will existing front ends still work? I have several front ends running on several distros and architectures (but not on the back-end machine), and upgrading them all at once would be a real pain. However, if they will still work, I can upgrade the back end, and then do the front ends as and when convenient. A -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
This is a log file with -v important,eit,siparser snippet just before sql error appears again: QSqlQuery::exec: empty query 2009-08-31 17:11:02.522 PESPacket: Failed CRC check 0x22161100 != 0xc3bfa4b5 for StreamID = 0x70 QSqlQuery::exec: empty query QSqlQuery::exec: empty query QSqlQuery::exec: empty query QSqlQuery::exec: empty query QSqlQuery::exec: empty query 2009-08-31 17:11:03.181 EITScanner (1): Added 28 EIT Events QSqlQuery::exec: empty query QSqlQuery::exec: empty query QSqlQuery::exec: empty query QSqlQuery::exec: empty query QSqlQuery::exec: empty query 222-22MM-22dd 22hh:22mm:22ss.22zzz DB Error (Update next_record): Query was: UPDATE record SET next_record = '-00-00T00:00:00' WHERE recordid = :RECORDID; Bindings were: :RECORDID=143 Driver error was [2/1064]: QMYSQL3: Unable to execute query Database error was: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':RECORDID' at line 1 full log file attached. observations: can't see anything particularly different just before that error happens. There are lots of PESPacket: Failed CRC check messages, but those happened from soon after backend is started up not just when it fails. After it starts to happen, all messages are prefixed with 222-22MM-22dd 22hh:22mm:22ss.22zzz rather than the correct date+timestamp. ** Attachment added: mythbackend.log.gz http://launchpadlibrarian.net/31081707/mythbackend.log.gz -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
@Kelvinelk I use EIT only, no mythfilldatabase. I have a log from it falling over last night, with bind values displayed, here is the first error message: 222-22MM-22dd 22hh:22mm:22ss.22zzz DB Error (Looking up chanID): Query was: SELECT chanid, useonairguide FROM channel, dtv_multiplex WHERE serviceid = :SERVICEID AND networkid= :NETWORKID AND transportid = :TRANSPORTID AND channel.mplexid = dtv_multiplex.mplexid AND channel.sourceid = :SOURCEID Bindings were: :NETWORKID=9018, :SERVICEID=23680, :SOURCEID=2, :TRANSPORTID=20480 Driver error was [2/1064]: QMYSQL3: Unable to execute query Database error was: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':SERVICEID AND networkid= :NETWORKID AND transportid' at line 1 After this it looks like every SQL statement fails and the backend is unresponsive from the frontend or mythweb. Full log attached. Warning:it is 6 meg when uncompressed. I can't see anything wrong with this query and it runs fine if I run it in mysql, although it does not return any rows. Roy ** Attachment added: mythbackend log http://launchpadlibrarian.net/31005328/mythbackend.log-20090830.gz -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Howdy all, I kinda doubt it is a problem with the database or the query itself. The messed up date makes me think of something like a corrupted pointer - most likely in the EIT code since that is the point in common for you all. A corrupted pointer will result in lots things being messed up in memory, and the malformed date format string just happens to be one of them. I'm sure there could be other reasons, but that is my theory, and that is the reason I focused on the error message reporting function rather than database accesses (because some people see completely different database errors). I assume that if you all stop and then restart the backend, the problem goes away until next occurrence (the next time the EIT code corrupts memory, if my theory is correct)? -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
I do not use mythfilldatabase - just the off-air schedules. I have not had the problem recur since I changed to --nojobqueue - the backend has been up for days, now. If upstream really is not fixing this version, I am not keen to experiment by turning the option off again to see if the problem recurs, since I will get complaints from others about the backend service going down. I will try it if there is a chance it will do some good. A -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
It might or might not yield anything helpful, but someone might try running with with -v eit,siparser (either one or both) logging turned on overnight. Might produce some really large log files, so be sure to turn it off in the morning! -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
hey all, fyi I have rebuilt my mythtv from the 2.1 fixes branch with the new DBError function from trunk to see if printing out the bind values helps with diagnosing it. I am still getting the problem every night so hopefully should have a better error message tomorrow. Roy -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
@MarcRandolph No problem, and thanks for reopening. @All with this bug Do you all use EIT solely? Or do you use mythfilldatabase to get listings from elsewhere also? -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Just a note that --nojobqueue did NOT solve it for me. It happened again last night. -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Thanks to all three of you for updates. Sounds like the common theme is EIT. I may have found the offending code, and if that is indeed the source of the problem you all are having, it has been changed in 0.22. For those that are interested, you'll notice that the following changeset describes fixing a problem with MythContext:DBError(): http://cvs.mythtv.org/trac/changeset/17306 You can look in eithelper.cpp and you will find Looking up chanID on line 669 uses MythContext::DBError(): http://svn.mythtv.org/trac/browser/branches/release-0-21-fixes/mythtv/libs/libmythtv/eithelper.cpp?rev=21547#L669 I would guess that it is the same for Update next_record, but I didn't go looking for it. As we mentioned previously, upstream isn't really accepting bugs for 0.21-fixes any more, so I'm afraid the solution will have to be moving to 0.22 (or else to disable EIT and maybe use xmltv). That isn't to say that there may not be additional problems regarding EIT, but I think the source of this bug is likely to be addressed, and as such, I'm going to close this bug. There are quite a lot of EIT fixes in 0.22 (reminder: if you do upgrade, be SURE to back up your database - and perhaps go read the -user and -dev lists, searching for EIT to make sure any recent fixes haven't introduced other problems that would affect you). Thank you all again for your help! ** Changed in: mythtv (Ubuntu) Status: Incomplete = Invalid -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
@MarcRandolph whoa - hang on a sec you want to close a bug based on a guess? play fair! the changeset you have linked to is for mythcommflag - I dont believe this is a function associated with EIT. @Roy Thomson Thanks for letting us know - I am now running with --nohousekeeper - will let you know how that goes -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
@Kevin,
Sorry, you are correct - I missed the mythcommflag angle somehow while I was
rushing around this morning. I'm more than happy to leave this open for a
while longer if you all can continue helping to debug it.
I did leave something out of my note earlier: MythContext:DBError() has been
replaced by MythDB::DBError() in 0.22.
MythDB:DBError() does look cleaner / safer:
void MythDB::DBError(const QString where, const QSqlQuery query)
{
QString str = QString(DB Error (%1):\n).arg(where);
str += Query was:\n;
str += query.executedQuery() + '\n';
QString tmp = toCommaList(query.boundValues());
if (!tmp.isEmpty())
{
str += Bindings were:\n;
str += tmp;
}
str += DBErrorMessage(query.lastError());
VERBOSE(VB_IMPORTANT, QString(%1).arg(str));
}
when compared to the old:
void MythContext::DBError(const QString where, const QSqlQuery query)
{
QString str = QString(DB Error (%1):\n).arg(where);
str += Query was:\n;
str += query.executedQuery() + \n;
str += QString::fromUtf8(DBErrorMessage(query.lastError()));
VERBOSE(VB_IMPORTANT, QString(%1).arg(str));
}
... so I there still may be hope that this has been resolved, although
I'm saying that with less certainty than I did earlier today :-).
Regardless, if anyone is willing to try to keep digging, I'll do my best
to support you all in your quest!
** Changed in: mythtv (Ubuntu)
Status: Invalid = Incomplete
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[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
I've started to get this issue in the last two weeks as well. mythbackend failing about every other day. Did you try .22? -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
On Wednesday 26 August 2009 08:14:54 Roy Thompson wrote: I've started to get this issue in the last two weeks as well. mythbackend failing about every other day. Did you try .22? Roy Trying .22 looks to be more complex than I first thought. However, I am now running the backend with options -v database --nojobqueue and have not had a crash since. I don't use any post-recording jobs so that looses nothing. I am going to drop the verbose option because it is not revealing anything useful. A -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
The fact that two of you have started seeing this within the past few weeks would seem to indicate something changed in that time frame, or soon before. Did you all do an update around that time? What versions are you running? Have you run a database check? Do your error messages look very close to Kyle's (with the invalid looking date 222-22MM- 22dd 22hh:22mm:22ss.22zzz)? Thank you, Marc -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
ah - another question: Do you all use remote frontends? If so, do you have a real IP address set for the backend rather than 127.0.0.1? Or did you all happen to change a configuration? Do you use EIT? Random idea: Perhaps the format of the EIT changed, and triggers a bug in MythTV. -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
The error which i get are similar in format to Kyle's. It seems to happen mostly in the middle of the night but it has been happening for some time, around the time that it was first reported by Kyle. It is only recently that it seems to be getting far more frequent. Background to my mythtv setup: I have been running mythtv for a couple of years now, initially using the packages that came with ubuntu, then moving to the weekly builds from mythbuntu. I have a remote frontend and the backend sits on a private subnet. EIT is used to collect the radio information only on DVB-T. Tuner card is a Hauppauge Nova-T 500. The issue always seems to occur when the backend _appears_ to be idle, but perhaps it is actually doing some housekeeping or something in the background? I am reluctant to start using 0.22 and wait for the bug to occur as we record things daily and any database backup will quickly be out of date. For now I will try alistair's trick of turning off the jobqueue thread, and if that doesn't work, try running backend with --nohousekeeping also. -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
As a follow-up: Do your error messages look very close to Kyle's (with the invalid looking date 222-22MM-22dd 22hh:22mm:22ss.22zzz)? Yes, indeed! Searching on 222 was how I found this thread. It also seems to happen in the middle of the night. Do you all use remote frontends? If so, do you have a real IP address set for the backend rather than 127.0.0.1? Yes. The backend is on an unattended machine that runs the backend, and a couple of other non-intensive services (Slimserver music server, IMAP server, DHCP server, DNS server, all for a small LAN only). It has no GUI, 2G RAM 1T+360G HDD, and is not at all stressed! Or did you all happen to change a configuration? No. It is an Ubuntu Hardy LTS machine that just receives the normal updates using apt-get once a week. It uses no special repos (apart from for the Slimserver). I have just run mythtv-setup the once, right at the start. However, it is not a Mythubuntu install. It is a server install with the mythbackend installed afterwards. BTW, the backend has not gone down since I turned off the jobqueue. A -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
I get very similar error message, yes, that is how I found this bug too. 222-22MM-22dd 22hh:22mm:22ss.22zzz DB Error (JobQueue::CleanupOldJobsInQueue: Error deleting old finished jobs.): Query was: DELETE FROM jobqueue WHERE (status in (:FINISHED, :ABORTED, :CANCELLED) AND statustime :DONEPURGEDATE) OR (status in (:ERRORED) AND statustime :ERRORSPURGEDATE) Driver error was [2/1064]: QMYSQL3: Unable to execute query Database error was: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':FINISHED, :ABORTED, :CANCELLED) AND statustime :DONEPURGEDATE) OR (status in ' at line 1 222-22MM-22dd 22hh:22mm:22ss.22zzz DB Error (HouseKeeper Cleaning TVChain Table): Query was: SELECT DISTINCT chainid FROM tvchain WHERE endtime :FOURHOURSAGO ; Driver error was [2/1064]: QMYSQL3: Unable to execute query Database error was: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':FOURHOURSAGO' at line 1 I have a confession to make: my mythbackend is running on gentoo, not ubuntu!! I know know, I should log it with gentoo and/or mythtv, but this is the only reference I found to this on google felt heartened that I found someone else with the same issue. My frontend and backend are on the same box, but I do have a real IP address set rather than 127.0.0.1 because I also use mythbackend as a upnp server. I do use EIT with DVB-T, adapter is Hauppauge Nova-T Stick. I am trying out --nojobqueue to see what happens... Roy -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
I have just started to get this problem as well. I notice that entries appear in the programs table of the database with all-zero start and end times, which cannot be right! This started out-of-the-blue just the other day. I have a setup that uses the off-air programme guide from UK DVB-T. I will give 0.22 a try, since the present installation is so unstable as to be near useless, after near-enough 18 months of virtually flawless operation. A -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Howdy, and thank you for helping to make Mythbuntu better. Unfortunately, mythtv developers upstream have stopped focusing on 0.21 based reports in preparation for a 0.22 release later this year. Is this bug still occurring for you? Could you please try to see if this bug is reproducible on 0.22? If it is, we can try to forward this bug upstream to get the right eyes focused on it. We have builds of mythtv 0.22 available on a PPA to test. Please follow the directions at http://mythbuntu.org/auto-builds to enable them. WARNING: If you intend to revert back to 0.21 after testing, you will need to back up your database before upgrading. Thanks! ** Changed in: mythtv (Ubuntu) Status: New = Incomplete -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
Hi, I've just come home, and haven't used MythTV since last night. The system has fallen over and mythbackend.log contains the following info... 222-22MM-22dd 22hh:22mm:22ss.22zzz decodeLongLong() called with the iterator too close to the end of the list. 222-22MM-22dd 22hh:22mm:22ss.22zzz decodeLongLong() called with the iterator too close to the end of the list. 222-22MM-22dd 22hh:22mm:22ss.22zzz AutoExpire: CalcParams(): Max required Free Space: 1.0 GB w/freq: 15 min 222-22MM-22dd 22hh:22mm:22ss.22zzz decodeLongLong() called with the iterator too close to the end of the list. 222-22MM-22dd 22hh:22mm:22ss.22zzz decodeLongLong() called with the iterator too close to the end of the list. 222-22MM-22dd 22hh:22mm:22ss.22zzz 2Reschedule requested for id -1. 222-22MM-22dd 22hh:22mm:22ss.22zzz DB Error (UpdateMatches): Query was: SELECT NULL from record WHERE type = :FINDONE AND findid = 0; Driver error was [2/1064]: QMYSQL3: Unable to execute query Database error was: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':FINDONE AND findid = 0' at line 1 222-22MM-22dd 22hh:22mm:22ss.22zzz DB Error (Update next_record): Query was: UPDATE record SET next_record = '-00-00T00:00:00' WHERE recordid = :RECORDID; Driver error was [2/1064]: QMYSQL3: Unable to execute query Database error was: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':RECORDID' at line 1 222-22MM-22dd 22hh:22mm:22ss.22zzz DB Error (Update next_record): Query was: UPDATE record SET next_record = '-00-00T00:00:00' WHERE recordid = :RECORDID; Driver error was [2/1064]: QMYSQL3: Unable to execute query Database error was: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':RECORDID' at line 1 222-22MM-22dd 22hh:22mm:22ss.22zzz DB Error (Update next_record): Query was: UPDATE record SET next_record = :NEXTREC WHERE recordid = :RECORDID; Driver error was [2/1064]: QMYSQL3: Unable to execute query Database error was: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':NEXTREC WHERE recordid = :RECORDID' at line 1 222-22MM-22dd 22hh:22mm:22ss.22zzz DB Error (Update next_record): Query was: UPDATE record SET next_record = :NEXTREC WHERE recordid = :RECORDID; Driver error was [2/1064]: QMYSQL3: Unable to execute query Database error was: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':NEXTREC WHERE recordid = :RECORDID' at line 1 222-22MM-22dd 22hh:22mm:22ss.22zzz DB Error (Update next_record): Query was: UPDATE record SET next_record = :NEXTREC WHERE recordid = :RECORDID; Driver error was [2/1064]: QMYSQL3: Unable to execute query Database error was: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':NEXTREC WHERE recordid = :RECORDID' at line 1 and so on... Kyle -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 330272] Re: mythbackend silently fails with QSqlQuery::exec: empty query
** Attachment added: mythbackend.log http://launchpadlibrarian.net/22704530/mythbackend.log -- mythbackend silently fails with QSqlQuery::exec: empty query https://bugs.launchpad.net/bugs/330272 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
