[libvirt] [bug-report] libvirtd can't be connected by using the master branch with lots of VMs

[Daniel P. Berrange]

On Fri, Mar 07, 2014 at 01:06:10PM +0800, Wangpan wrote:
> bug address: https://bugzilla.redhat.com/show_bug.cgi?id=1066801
> I can reproduce it at master/v1.2.1-maint/v1.1.4-maint/v1.1.3.4 release branches everytime,
> but cann't reproduce it at v1.2.1，so I believe this bug is imported by the maintain patches after v1.2.1 release.
> 
> Steps to Reproduce:
> 1.create many VMs(40 in my env) on the host
> 2.kill -9 `pid of libvirtd`
> 3.start libvirtd by using service libvirt-bin start
> 
> Actual results:
> virsh version/list command is hung there without any responses
> 
> Expected results:
> virsh version/list return the correct things
> 
> Additional info:
> if there are few VMs(1 vm in my env), the virsh version command is OK

I've reproduced the problem - the key thing I was missing is that it
only occurs if every VM is using a different named nwfilter. It they
all use 'clean-traffic' it is fine, but if they use 'clean-traffic-xxx'
where 'xxx' is the name of the VM it deadlocks. This is why I never
spotted it before :-(

Please try out this patch

https://www.redhat.com/archives/libvir-list/2014-March/msg00501.html


Regards,
Daniel
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