Bug 68220 - running kfind standalone it intermittently locks up doing trivial searches
Summary: running kfind standalone it intermittently locks up doing trivial searches
Status: RESOLVED FIXED
Alias: None
Product: kfind
Classification: Applications
Component: general (show other bugs)
Version: unspecified
Platform: Compiled Sources Linux
: NOR normal
Target Milestone: ---
Assignee: Eric Coquelle
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2003-11-14 17:05 UTC by Jens Dagerbo
Modified: 2005-01-25 18:48 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:


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Description Jens Dagerbo 2003-11-14 17:05:10 UTC
Version:           KFind: 2.0, KDE: 3.1.93 (CVS >= 20031111) (using KDE Devel)
Installed from:    Compiled sources
Compiler:          gcc version 3.2.2
OS:          Linux (i686) release 2.6.0-test6

If I'm running KFind standalone (not embedded into konqueror), I can make it lock up just doing a few trivial searches.

For instance, searching through the Quanta source looking for files named "edit*" locked up.

I might be imagining it, but it appears to lock up more often if you press the find button instead of just hitting enter in the "Named:" lineedit.

I realize this isn't the best of reproduction descriptions, but from where I sit, the question is more of what can I do to NOT make it lock up.

(I couldn't reproduce this when running the embedded find dialog in konqueror. There i just works, and fast. :) )
Comment 1 Stephan Binner 2003-11-15 21:14:08 UTC
"kill -SIGSEGV <processid>" the process and post the backtrace please.
Comment 2 Jens Dagerbo 2003-11-16 03:57:25 UTC
The backtrace appears useless to me:

[New Thread 16384 (LWP 20216)]
0x4126b359 in waitpid () from /lib/libpthread.so.0
#0  0x4126b359 in waitpid () from /lib/libpthread.so.0
#1  0x407b0a50 in KCrash::defaultCrashHandler(int) ()
   from /opt/kde/lib/libkdecore.so.4
#2  0x4126a17c in __pthread_sighandler () from /lib/libpthread.so.0


Attaching with GDB is a little more promising:

(gdb) bt
#0  0x4126a2d8 in write () from /lib/libpthread.so.0
#1  0x412cf8ec in FAMDebugLevel () from /usr/lib/libfam.so.0

It does appear FAM related. If I stop FAM I cannot reproduce the problem, but as soon as I start it again, the freeze is back.

I guess this means it might be a distro, or even system, issue.
Comment 3 Ricky Ng-Adam 2004-03-14 21:31:40 UTC
Thanks for the tip on fam - I was able to finally make it work without hang on MDK10 (now community; KDE3.2, kernel2.6.3) which has this problem on my dual celeron:

http://qa.mandrakesoft.com/show_bug.cgi?id=8079
Comment 4 JW 2004-05-28 00:53:00 UTC
I'm using 3.3_alpha1 and the problem is still there, as it was is kde 3.2.

I'm running gentoo.

kfind is UNUSABLE. Just try to find a file in /usr. As soon as it starts the seach it freezes there, but the HD is working hard. After a few minutes I kill it.

Fortunately I have the gnome seach tool to get my searches done.
Comment 5 Daniel Osborne 2004-07-13 09:09:54 UTC
The find tool is completely unusable for me too. It locks up for me as soon as I hit 'find', no matter what options I input. I run Mandrake 10.0 with kernel 2.6.3 and KDE 3.2 just updated to 3.2.3 (which caused more problems not related) but didn't help. I just use the console find.
Comment 6 Christopher Bolin 2004-10-09 07:12:12 UTC
Using KDE 3.3.0 I can reproduce this 100% of the time

#kfind and search for ANYTHING and it locks up hard.

# killall famd

and try again and Kfind works fine.
Comment 7 Jay Freyensee 2005-01-16 02:37:30 UTC
I have Mandrake 10.1, kernel 2.6.8, and I grabbed and compiled KDE 3.3.2 from konstruct/kde.org, and I am having the same kfind problems.

If I try and do ANY search starting from '/' (and not the default '/home/<USER>', kfind locks up.

I did do a 'kill -SIGV <processid>', as I have seen this requested:

Using host libthread_db library "/lib/tls/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 1096763648 (LWP 11540)]
[KCrash handler]
#7  0x4153e03c in memcpy () from /lib/tls/libc.so.6
#8  0x40f1079d in QString::operator+= () from /usr/lib/qt3/lib/libqt-mt.so.3
#9  0x23ec889a in ?? ()
#10 0x23f9ece8 in ?? ()
#11 0x00000234 in ?? ()
#12 0x01ff6f88 in ?? ()
#13 0x4153002f in _IO_file_fopen () from /lib/tls/libc.so.6
#14 0xbfff70b0 in ?? ()
#15 0xbfff7150 in ?? ()
#16 0x40ee588d in QDir::init () from /usr/lib/qt3/lib/libqt-mt.so.3
#17 0x2493fe30 in ?? ()
#18 0xbfff70b0 in ?? ()
#19 0xffffffff in ?? ()
#20 0x41080aa8 in ?? () from /usr/lib/qt3/lib/libqt-mt.so.3
#21 0x23e66458 in ?? ()
#22 0x00000287 in ?? ()
#23 0x2493fee0 in ?? ()
#24 0x41080aa8 in ?? () from /usr/lib/qt3/lib/libqt-mt.so.3
#25 0xbfff7150 in ?? ()
#26 0x08074b9c in QChar::null ()
#27 0xbfff70f0 in ?? ()
#28 0x40ee7684 in QDir::QDir () from /usr/lib/qt3/lib/libqt-mt.so.3
#29 0xbfff70f0 in ?? ()
#30 0xbfff7180 in ?? ()
#31 0x00000006 in ?? ()
#32 0x40f1079d in QString::operator+= () from /usr/lib/qt3/lib/libqt-mt.so.3
#33 0x24a91aae in ?? ()
#34 0x24577e68 in ?? ()
#35 0x00000006 in ?? ()
#36 0xbfff7154 in ?? ()
#37 0x41536dda in free () from /lib/tls/libc.so.6
Comment 8 Waldo Bastian 2005-01-25 18:48:03 UTC
CVS commit by waba: 

Disable recursively watching for updates
BUG: 68220
BUG: 77854
BUG: 77846
BUG: 79512
BUG: 85802


  M +13 -0     kfinddlg.cpp   1.25


--- kdebase/kfind/kfinddlg.cpp  #1.24:1.25
@@ -127,4 +127,16 @@ void KfindDlg::startSearch()
   dirwatch->addDir(query->url().path(),true);
 
+#if 0
+  // waba: Watching for updates is disabled for now because even with FAM it causes too
+  // much problems. See BR68220, BR77854, BR77846, BR79512 and BR85802
+  // There are 3 problems:
+  // 1) addDir() keeps looping on recursive symlinks
+  // 2) addDir() scans all subdirectories, so it basically does the same as the process that
+  // is started by KQuery but in-process, undoing the advantages of using a seperate find process
+  // A solution could be to let KQuery emit all the directories it has searched in.
+  // Either way, putting dirwatchers on a whole file system is probably just too much.
+  // 3) FAM has a tendency to deadlock with so many files (See BR77854) This has hopefully
+  // been fixed in KDirWatch, but that has not yet been confirmed.
+
   //Getting a list of all subdirs
   if(tabWidget->isSearchRecursive() && (dirwatch->internalMethod() == KDirWatch::FAM))
@@ -134,4 +146,5 @@ void KfindDlg::startSearch()
       dirwatch->addDir(*it,true);
   }
+#endif
 
   win->beginSearch(query->url());