Date: Fri, 5 Mar 2004 07:47:34 -0700 (MST) From: Mac Newbold <mac@macnewbold.com> To: freebsd-current@freebsd.org Subject: uthread_kern.c problems (still) Message-ID: <20040305074521.V91802@bas.flux.utah.edu>
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I've been getting bitten a lot lately by a bug in uthread_kern.c that keeps causing my apache processes to run away, until I kill them. (dmesg indicates it has also been happening to fstat processes too, but they die instead of running away.) The apache error log indicates this: [Tue Mar 02 09:54:35 2004] [notice] child pid 52132 exit signal Abort trap (6) Fatal error 'Unable to read from thread kernel pipe' at line 1100 in file /usr/src/lib/libc_r/uthread/uthread_kern.c (errno = 0) dmesg gets stuff like this: pid 40525 (fstat), uid 0: exited on signal 11 pid 40377 (httpd), uid 80: exited on signal 6 pid 39306 (httpd), uid 80: exited on signal 6 pid 40770 (httpd), uid 80: exited on signal 6 pid 41064 (fstat), uid 0: exited on signal 11 I'm running apache2, mysql, php, and openssl: Apache/2.0.48 (Unix) mod_perl/1.99_12 Perl/v5.6.1 PHP/4.3.4 mod_ssl/2.0.48 OpenSSL/0.9.7a Server The crashes come most often running php scripts, and certain scripts can be very reliable in causing the problem. > uname -a FreeBSD <host-name> 5.2-CURRENT FreeBSD 5.2-CURRENT #3: Thu Feb 26 17:50:22 MST 2004 root@tahiti.dmedia.ws:/usr/obj/usr/src/sys/GENERIC i386 It started after I had been using 5.1-p10 for several months, so I upgraded to the lastest current (post 5.2-RELEASE) a few days ago, and the problem was still there. Google reveals that people have been seeing crashes from it for at least 8 months now, going back to June 2003, most often with gnucash for some reason, but with apache as well. Related messages: http://lists.freebsd.org/pipermail/freebsd-hackers/2003-November/004121.html http://lists.freebsd.org/pipermail/freebsd-current/2004-January/017764.html http://lists.freebsd.org/pipermail/freebsd-gnome/2004-January/004505.html http://lists.freebsd.org/pipermail/freebsd-ports/2003-June/002248.html http://lists.freebsd.org/pipermail/freebsd-ports/2003-July/002839.html Any ideas for solutions or workarounds would be greatly appreciated. If others are having this problem, and you'd like something to keep your runaway processes under control, I've got a script for it now. Thanks, Mac -- Mac Newbold mac@macnewbold.com MNE - Mac Newbold Enterprises, LLC <a href="http://www.macnewbold.com/">MNE</a>; <a href="http://www.dmedia.ws/">Dmedia</a>; <a href="http://www.bluelune.com/">Bluelune Web Guide</a>
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