On Tue, Apr 14, 2009 at 04:00:18PM +0100, Daniel P. Berrange wrote:
On Tue, Apr 14, 2009 at 03:56:28PM +0200, Radek Hladik wrote:
When running from command line everything seems to work fine. This is of course singlethreaded and potential resource leaks need not to cause a problem. However when running from webserver, the result is much more interesting. When connecting to qemu:///system (via local socket) using <? libvirt_connect($uri,true); ?> I can crash the libvirt daemon after cca 10 page reloads - sometimes with message Apr 13 15:32:44 kvmtest kernel: libvirtd[8263]: segfault at 4 ip 00000039d7223fc0 sp 00007fa6fbc29a88 error 6 in libdbus-1.so.3.4.0[39d7200000+3c000] in system log, sometimes without any message.
Crashing the libvirtd daemon is not your fault ! It is supposed to be completely robust against whatever bad stuff the client may throw at it. So even if the client has a bug, then it shouldn't crash the daemon.
If possible it'd be helpful if you can get a stack trace from the daemon. You can do this by stopping the demon '/etc/init.d/libvirtd stop' and then running it under GDB directly
'gdb /usr/sbin/libvirtd'
make sure you have libvirt-debuginfo RPM installed if using Fedora, or have built with '-g' debug option if built manually.
Actually now that I remember, there were a definitely a couple of libvirtd crashing bugs in the 0.6.0 release. So well worth upgrading before trying to debug this in any detail
httpd-2.2.11-6.x86_64 php-5.2.9-1.fc11.x86_64 php-devel-5.2.9-1.fc11.x86_64 libvirt-0.6.0-2.fc11.x86_64 qemu-0.9.1-12.fc11.x86_64 libvirt-devel-0.6.0-2.fc11.x86_64
I'd recommend updating to the latest libvirt 0.6.2 release that should be available in rawhide now. It fixed quite a few crashes & leaks, which you may be unlucky enough to be hitting
Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|