https://bugzilla.novell.com/show_bug.cgi?id=446233 User tvrtko@ursulin.net added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c1 --- Comment #1 from Tvrtko Ursulin 2008-11-18 13:22:43 MST --- Just to clarify, it dies at a "random" time, not immediately on startup. Maybe it has something to do when it gets to the point of trying to resolve something with a non-existent method. But I am just guessing, I don't even understand how the hosts line works and why are entries after [NOTFOUND=return] used. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User pbaudis@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c3 Petr Baudis changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO Info Provider| |tvrtko@ursulin.net --- Comment #3 from Petr Baudis 2008-11-18 15:01:38 MST --- Please call ulimit -c unlimited and then run nscd -d outside of gdb and record the last few lines before it aborts. Attach the core if it dumps any. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User tvrtko@ursulin.net added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c5 Tvrtko Ursulin changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |NEW Info Provider|tvrtko@ursulin.net | --- Comment #5 from Tvrtko Ursulin 2008-11-19 02:36:17 MST --- Pasting output and attaching core as requested. -------------------------------------- 20309: GETPWBYNAME (root) 20309: handle_request: request received (Version = 2) from PID 22926 20309: GETPWBYNAME (root) 20309: handle_request: request received (Version = 2) from PID 22926 20309: GETPWBYNAME (root) 20309: handle_request: request received (Version = 2) from PID 22926 20309: GETPWBYNAME (root) 20309: handle_request: request received (Version = 2) from PID 22927 20309: GETFDGR 20309: provide access to FD 9, for group 20309: Reloading "LIVING" in hosts cache! 20309: Reloading "secure.sophos.com" in hosts cache! 20309: Reloading "nobody" in password cache! 20309: Reloading "postfix" in password cache! 20309: remove GETAI entry "localhost" 20309: remove GETPWBYUID entry "1005" 20309: remove GETPWBYNAME entry "tvrtko" nscd: mem.c:413: gc: Assertion `(*next_data)->packet == off_alloc' failed. Aborted (core dumped) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User roland.kletzing@materna.de added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c7 roland kletzing changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |roland.kletzing@materna.de --- Comment #7 from roland kletzing 2008-11-22 10:16:41 MST --- side-note: there`s a drop-in replacement for nscd at http://busybox.net/~vda/unscd/ it`s trying to adress issues like these - maybe worth to take a look at. description: nscd problems are not exactly unheard of. Over the years, there were quite a bit of bugs in it. This leads people to invent babysitters which restart crashed/hung nscd. This is ugly. After looking at nscd source in glibc I arrived to the conclusion that its desidn is contributing to this significantly. Even if nscd's code is 100.00% perfect and bug-free, it can still suffer from bugs in libraries it calls. As designed, it's a multithreaded program which calls NSS libraries. These libraries are not part of libc, they may be provided by third-party projects (samba, ldap, you name it). Thus nscd cannot be sure that libraries it calls do not have memory or file descriptor leaks and other bugs. Since nscd is multithreaded program with single shared cache, any resource leak in any NSS library has cumulative effect. Even if an NSS library leaks a file descriptor 0.01% of the time, this will make nscd crash or hang after some time. Of course bugs in NSS .so modules should be fixed, but meanwhile I do want nscd which does not crash or lock up. So I went ahead and wrote a replacement. It is a single-threaded server process which offloads all NSS lookups to worker children (not threads, but fully independent processes). Cache hits are handled by parent. Only cache misses start worker children. This design is immune against resource leaks and hangs in NSS libraries. It is also many times smaller. Currently (v0.34) it emulates glibc nscd pretty closely (handles same command line flags and config file), and is moderately tested. Please note that as of 2008-08 it is not in wide use (yet?). If you have trouble compiling it, see an incompatibility with "standard" one or experience hangs/crashes, please report it to vda.linux@googlemail.com -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User pbaudis@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c9 --- Comment #9 from Petr Baudis 2008-11-23 06:29:44 MST --- Yes, we are aware of and considering unscd in the long run; I'm currently working on preparing unscd in the build service so that interested people can start trying it out. I think I have tracked down the bug: http://sourceware.org/bugzilla/show_bug.cgi?id=5381 I'm building a test patch now. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User tvrtko@ursulin.net added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c11 --- Comment #11 from Tvrtko Ursulin 2008-11-23 09:38:15 MST --- Could you please make a x86_64 build as well? I would have to install 32-bit samba-client in order to get 32-bit libnss_wins which I use. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User tvrtko@ursulin.net added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c13 --- Comment #13 from Tvrtko Ursulin 2008-11-24 06:18:31 MST --- Thanks. Got a different assertion with this one: 8499: remove GETPWBYUID entry "51" 8499: remove GETPWBYNAME entry "nobody" 8499: remove GETPWBYUID entry "65534" 8499: remove GETPWBYNAME entry "postfix" nscd: mem.c:413: gc: Assertion `next_data < &he_data[db->head->nentries]' failed. Unfotunately I forgot to enable core dumps this time. Will attach it if I get the same failure again. Also, when restarting after a failure it complains about this: 10160: invalid persistent database file "/var/run/nscd/passwd": verification failed So I rm-ed that file and started it again. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User tvrtko@ursulin.net added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c15 --- Comment #15 from Tvrtko Ursulin 2008-11-24 08:10:52 MST --- Ok, another crash with the same assertion and this time the core (persistence disabled) will follow: 10276: Reloading "195.29.150.5" in hosts cache! 10276: Reloading "localhost" in hosts cache! 10276: Reloading "nobody" in password cache! 10276: Reloading "postfix" in password cache! 10276: Reloading "213.202.100.127" in hosts cache! 10276: remove GETPWBYUID entry "1005" 10276: remove GETPWBYNAME entry "tvrtko" nscd: mem.c:413: gc: Assertion `next_data < &he_data[db->head->nentries]' failed. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User pbaudis@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c17 --- Comment #17 from Petr Baudis 2008-11-24 18:53:05 MST --- Oh, there was a simple logic error in my previous patch. Rebuilding. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User tvrtko@ursulin.net added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c19 --- Comment #19 from Tvrtko Ursulin 2008-11-25 11:19:55 MST --- Actually at http://www.suse.de/~pbaudis/bug-446233-1-11.1-x86_64/ and http://www.suse.de/~pbaudis/bug-446233-1-11.1/ ;) Testing.. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User tvrtko@ursulin.net added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c21 Tvrtko Ursulin changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |ASSIGNED Info Provider|tvrtko@ursulin.net | --- Comment #21 from Tvrtko Ursulin 2008-11-25 16:11:46 MST --- Created an attachment (id=255484) --> (https://bugzilla.novell.com/attachment.cgi?id=255484) After a segfault -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User pbaudis@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c23 --- Comment #23 from Petr Baudis 2008-11-27 08:22:09 MST --- Crashed for me, from what I can see this appears to be a prune_cache race, seems to be trivial to fix. Please keep gathering data. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User tvrtko@ursulin.net added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c25 --- Comment #25 from Tvrtko Ursulin 2008-11-28 01:39:34 MST --- Hard to say about the uptime - I think it feeled better after your patch but the sample was really to small to say for sure. I am continuing to keep an eye on it (now with your latest version) but this week I wasn't able to spend much time on it. Possibly interesting data point is that nscd is unstable on Ubuntu 8.10 as well. They have version 2.8~20080505-0ubuntu7 there which is also giving random general protection faults. So your fix may be worth pushing upstream and pinging the competition about it. I may do this last bit, in fact I was planning to raise a bug there and link it to this one but had really no time this week. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User pbaudis@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c27 --- Comment #27 from Petr Baudis 2008-12-02 12:29:52 MST --- Tvrtko: Yes, the Ubuntu nscd maintainer already got in touch with me earlier. Upstream seems to have decided to ignore my bug report for now, but maybe Ubuntu will pick it directly. Dirk: Interesting - I'm looking forward to a core. The current version had a newly introduced dead-lock in it, I have rebuilt with a more proper fix for the prune-invalidate race: http://www.suse.de/~pbaudis/bug-446233-3-11.1-x86_64/ and http://www.suse.de/~pbaudis/bug-446233-3-11.1/ -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User pbaudis@novell.com added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c29 --- Comment #29 from Petr Baudis 2008-12-03 01:52:27 MST --- Huh, now that seems to be yet another different bug, let's call it 446233.28 for now. ;-) Can you make the core available and attach your /etc/nsswitch.conf? -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User swamp@suse.com added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c33 Swamp Script User changed: What |Removed |Added ---------------------------------------------------------------------------- Status Whiteboard| |maint:released:11.0:21210 --- Comment #33 from Swamp Script User 2009-01-01 10:04:53 MST --- Update released for: glibc, glibc-devel, glibc-html, glibc-i18ndata, glibc-info, glibc-locale, glibc-obsolete, glibc-profile, nscd Products: openSUSE 11.0 (debug, i386, i686, ppc, ppc64, x86_64) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.

https://bugzilla.novell.com/show_bug.cgi?id=446233 User swamp@suse.com added comment https://bugzilla.novell.com/show_bug.cgi?id=446233#c35 Swamp Script User changed: What |Removed |Added ---------------------------------------------------------------------------- Status Whiteboard|maint:released:11.0:21210 |maint:released:11.0:21210 | |maint:released:11.1:22237 --- Comment #35 from Swamp Script User 2009-02-05 07:44:57 MST --- Update released for: glibc, glibc-debuginfo, glibc-debugsource, glibc-devel, glibc-html, glibc-i18ndata, glibc-info, glibc-locale, glibc-obsolete, glibc-profile, nscd Products: openSUSE 11.1 (debug, i586, i686, ppc, ppc64, x86_64) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.