I was using 2.2.5, and downloaded 8 fairly large torrent. That succeeded, eventually, taking about 4 days. However, shortly thereafter, ktorrent would just disappear, and pgrep would show that it was entirely gone.

So I upgraded to 2.2.6, just in case. No go - that would crash shortly after being started, most likely due to the torrents, I assume.

Well, seeing that ktorrent.org claimed no more bug fixes in the 2.x stream, and that kde4 apps could run in kde3, I went and installed the minimal kde4 libraries to get ktorrent 3 running. Lo and behold ... that crashes, too. First with 3.0.1, and since I already have kde4 libraries installed, I tried 3.0.2.

So that's the versioning. The problem is that ktorrent *does* pick up the 8 torrents I'm still seeding (to get back to a reasonable ratio), and enables 5 of them at seeming random (not that I care which ones). And then after a half hour or an hour, it just locks up and then dies.

I'm not really sure what diagnostic information I can gather, though I can tell you that ktorrent is trying to seed ~25GB of data, and the other torrents it still knows about would bring the total to over 50GB.

So you don't get a KDE crash dialog ?

No, I've never seen a KDE crash dialog that I recall for *anything*, and definitely not here.

...

Apparently, I don't have drkonqi installed... going to do that now. Not sure whether I need the KDE3 version (as I'm running KDE 3) or the KDE4 version...

Even now, drkonqi doesn't come up when ktorrent goes away. Even the return code is 0, which surprised me.

I even brought up kdevelop, had it create a new kde 3 project (my kdevelop doesn't have templates for kde 4) where I inserted code that said:

Code: Select all

   char* bug = NULL;
   *bug = 3;


and this brought up drkonqi when I ran it from the commandline (didn't when I ran from inside kdevelop), so apparently that part is working ok. I even retried using optimized mode, and that still would bring up drkonqi.

Then it is probably an uncaught exception or some other signal then a segmentation fault.

Could you run it in gdb until it crashes ? And then type in bt, and gdb should print a backtrace.

I'm getting this when adding the scheduler plugin ...

Code: Select all

#0  0xb7f96410 in __kernel_vsyscall ()
#1  0xb620e9ab in write () from /lib/libc.so.6
#2  0xb61bd747 in _IO_file_write () from /lib/libc.so.6
#3  0xb61bd415 in ?? () from /lib/libc.so.6
#4  0xb61bd6ef in _IO_do_write () from /lib/libc.so.6
#5  0xb61bdec5 in _IO_file_sync () from /lib/libc.so.6
#6  0xb61b2282 in fflush () from /lib/libc.so.6
#7  0xb7e39ea6 in ?? () from /usr/lib/qt4/libQtCore.so.4
#8  0xb7e3e720 in ?? () from /usr/lib/qt4/libQtCore.so.4
#9  0xb7e39a2f in QFSFileEngine::flush () from /usr/lib/qt4/libQtCore.so.4
#10 0xb7dff09d in QFile::flush () from /usr/lib/qt4/libQtCore.so.4
#11 0xb7e106fa in ?? () from /usr/lib/qt4/libQtCore.so.4
#12 0xb7e107b2 in QTextStream::flush () from /usr/lib/qt4/libQtCore.so.4
#13 0xb7e107d2 in flush () from /usr/lib/qt4/libQtCore.so.4
#14 0xb7e110a6 in endl () from /usr/lib/qt4/libQtCore.so.4
#15 0xb6d93bbd in ?? () from /usr/kde/4.0/lib/libbtcore.so.3
#16 0xb6d93524 in bt::endl () from /usr/kde/4.0/lib/libbtcore.so.3
#17 0xb6db2062 in bt::PeerManager::loadPeerList ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#18 0xb6ddb1f6 in bt::TorrentControl::continueStart ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#19 0xb6ddb51e in bt::TorrentControl::start ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#20 0xb7f6b2f5 in kt::QueueManager::startSafely ()
   from /usr/kde/4.0/lib/libktcore.so.3
#21 0xb7f6b61c in kt::QueueManager::start ()
   from /usr/kde/4.0/lib/libktcore.so.3
#22 0xb7f6c136 in kt::QueueManager::orderQueue ()
   from /usr/kde/4.0/lib/libktcore.so.3
#23 0xb7f6c207 in kt::QueueManager::torrentStopped ()
   from /usr/kde/4.0/lib/libktcore.so.3
#24 0xb7f6c828 in kt::QueueManager::qt_metacall ()
   from /usr/kde/4.0/lib/libktcore.so.3
#25 0xb7e6d449 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#26 0xb7e6deaa in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#27 0xb6dc34f3 in bt::TorrentInterface::torrentStopped ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#28 0xb6dddc94 in bt::TorrentControl::stop ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#29 0xb7f6ab94 in kt::QueueManager::stopSafely ()
   from /usr/kde/4.0/lib/libktcore.so.3
#30 0xb7f6b27b in kt::QueueManager::stop ()
   from /usr/kde/4.0/lib/libktcore.so.3
#31 0xb7f6bfc8 in kt::QueueManager::orderQueue ()
   from /usr/kde/4.0/lib/libktcore.so.3
#32 0xb7f6c207 in kt::QueueManager::torrentStopped ()
   from /usr/kde/4.0/lib/libktcore.so.3
#33 0xb7f6c828 in kt::QueueManager::qt_metacall ()
   from /usr/kde/4.0/lib/libktcore.so.3
#34 0xb7e6d449 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#35 0xb7e6deaa in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#36 0xb6dc34f3 in bt::TorrentInterface::torrentStopped ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#37 0xb6dddc94 in bt::TorrentControl::stop ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#38 0xb7f6ab94 in kt::QueueManager::stopSafely ()
   from /usr/kde/4.0/lib/libktcore.so.3
#39 0xb7f6b27b in kt::QueueManager::stop ()
   from /usr/kde/4.0/lib/libktcore.so.3
#40 0xb7f6bfc8 in kt::QueueManager::orderQueue ()
   from /usr/kde/4.0/lib/libktcore.so.3
#41 0xb7f6c207 in kt::QueueManager::torrentStopped ()
   from /usr/kde/4.0/lib/libktcore.so.3
#42 0xb7f6c828 in kt::QueueManager::qt_metacall ()
   from /usr/kde/4.0/lib/libktcore.so.3
#43 0xb7e6d449 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#44 0xb7e6deaa in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#45 0xb6dc34f3 in bt::TorrentInterface::torrentStopped ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#46 0xb6dddc94 in bt::TorrentControl::stop ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#47 0xb7f6ab94 in kt::QueueManager::stopSafely ()
   from /usr/kde/4.0/lib/libktcore.so.3
#48 0xb7f6b27b in kt::QueueManager::stop ()
   from /usr/kde/4.0/lib/libktcore.so.3
#49 0xb7f6bfc8 in kt::QueueManager::orderQueue ()
   from /usr/kde/4.0/lib/libktcore.so.3
#50 0xb7f6c207 in kt::QueueManager::torrentStopped ()
   from /usr/kde/4.0/lib/libktcore.so.3
#51 0xb7f6c828 in kt::QueueManager::qt_metacall ()
   from /usr/kde/4.0/lib/libktcore.so.3
#52 0xb7e6d449 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#53 0xb7e6deaa in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#54 0xb6dc34f3 in bt::TorrentInterface::torrentStopped ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#55 0xb6dddc94 in bt::TorrentControl::stop ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#56 0xb7f6ab94 in kt::QueueManager::stopSafely ()
   from /usr/kde/4.0/lib/libktcore.so.3
#57 0xb7f6b27b in kt::QueueManager::stop ()
   from /usr/kde/4.0/lib/libktcore.so.3
#58 0xb7f6bfc8 in kt::QueueManager::orderQueue ()
   from /usr/kde/4.0/lib/libktcore.so.3
#59 0xb7f6c207 in kt::QueueManager::torrentStopped ()
   from /usr/kde/4.0/lib/libktcore.so.3
#60 0xb7f6c828 in kt::QueueManager::qt_metacall ()
   from /usr/kde/4.0/lib/libktcore.so.3
#61 0xb7e6d449 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#62 0xb7e6deaa in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#63 0xb6dc34f3 in bt::TorrentInterface::torrentStopped ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#64 0xb6dddc94 in bt::TorrentControl::stop ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#65 0xb7f6ab94 in kt::QueueManager::stopSafely ()
   from /usr/kde/4.0/lib/libktcore.so.3
#66 0xb7f6b27b in kt::QueueManager::stop ()
   from /usr/kde/4.0/lib/libktcore.so.3
#67 0xb7f6bfc8 in kt::QueueManager::orderQueue ()
   from /usr/kde/4.0/lib/libktcore.so.3
#68 0xb7f6c207 in kt::QueueManager::torrentStopped ()
   from /usr/kde/4.0/lib/libktcore.so.3
#69 0xb7f6c828 in kt::QueueManager::qt_metacall ()
   from /usr/kde/4.0/lib/libktcore.so.3
#70 0xb7e6d449 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#71 0xb7e6deaa in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#72 0xb6dc34f3 in bt::TorrentInterface::torrentStopped ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#73 0xb6dddc94 in bt::TorrentControl::stop ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#74 0xb7f6ab94 in kt::QueueManager::stopSafely ()
   from /usr/kde/4.0/lib/libktcore.so.3
#75 0xb7f6b27b in kt::QueueManager::stop ()
   from /usr/kde/4.0/lib/libktcore.so.3
#76 0xb7f6bfc8 in kt::QueueManager::orderQueue ()
   from /usr/kde/4.0/lib/libktcore.so.3
#77 0xb7f6c207 in kt::QueueManager::torrentStopped ()
   from /usr/kde/4.0/lib/libktcore.so.3
#78 0xb7f6c828 in kt::QueueManager::qt_metacall ()
   from /usr/kde/4.0/lib/libktcore.so.3
#79 0xb7e6d449 in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#80 0xb7e6deaa in QMetaObject::activate () from /usr/lib/qt4/libQtCore.so.4
#81 0xb6dc34f3 in bt::TorrentInterface::torrentStopped ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#82 0xb6dddc94 in bt::TorrentControl::stop ()
   from /usr/kde/4.0/lib/libbtcore.so.3
#83 0xb7f6ab94 in kt::QueueManager::stopSafely ()
   from /usr/kde/4.0/lib/libktcore.so.3
#84 0xb7f6b27b in kt::QueueManager::stop ()
   from /usr/kde/4.0/lib/libktcore.so.3
#85 0xb7f6bfc8 in kt::QueueManager::orderQueue ()


and this continues on for a looooong time. It's the easiest-to-reproduce crash, as I don't need to wait long. Unfortunately, it does happen in a back-end process. Apparently, ktorrent forks or something, and gdb thinks the program has exited prior to its completion. Luckily, I remembered about the -p flag: gdb -p $(pgrep ktorrent). That got me attached, and bt then told me about this apparent infinite loop.

Is there any other debug information I can gather that may help with this apparent infinite loop?

I've even gone to a new machine, amd64, all kde4 to start with (i.e., even my desktop is kde4), and I'm getting the same problem, even when I go try to delete a torrent.

Thanks,

I see what the problem is, it should not take long to fix.

OK, it should be fixed in revision 811166