Re: [libvirt-users] About debugging of libvirt.
On 18.12.2013 07:17, cool dharma06 wrote:
i am using libvirt-1.1.4 with xen(libxl). When destroying the VM its
showing the following error :
virsh # destroy 4
error: Failed to destroy domain 4
error: End of file while reading data: Input/output error
error: One or more references were leaked after disconnect from the
hypervisor
error: Failed to reconnect to the hypervisor
virsh # list
error: failed to connect to the hypervisor
error: no valid connection
error: Failed to connect socket to '/var/run/libvirt/libvirt-sock':
Connection refused
already i send one request to this community to solve this problem. they
suggested to do gdb.
Any guide to do the gdb libvirtd. By googling i did the following things:
1. i enable the logoutput and loglevel in libvirtd.conf
http://wiki.libvirt.org/page/DebugLogs
2. restarted the libvirtd with the changed configuration file.
3. ps -aux | grep libvirtd
4. gdb libvirtd pid
5. then what i have to do to find the reason for this error.
You need to hit 'c[enter]' in the gdb console (and by [enter] I mean pressing the
enter key not actually typing it onto console). Then you need to run 'virsh destroy
4' in a different console so you reproduce the crash. After this, when you return do
gdb you should see a stack trace. It will point to line which caused the trouble. If not,
you may need to install libvirt debug infos (actual command to do this is distro
specific).
Btw: you can join steps 3 and 4 into one:
gdb -p $(pgrep libvirtd)
Once you have the stack trace and the logs, please do open a new bug against libvirt:
https://bugzilla.redhat.com/enter_bug.cgi?product=Virtualization%20Tools
and attach the stack trace and the debug logs.
Michal