[libvirt-users] Unable to close open libvirt connections

[Daniel P. Berrange]

On Thu, Jan 12, 2012 at 10:10:47AM +0100, Michal Privoznik wrote:
> On 11.01.2012 19:14, Jatin Kumar wrote:
> > Hello,
> > I was getting the following error in syslog:
> > libvirtd: 21:19:12.116: 10955: error : qemudDispatchServer:1355 : Too
> > many active clients (20), dropping connection from 127.0.0.1;0
> > 
> > I investigated a bit and tried the following in a python console:
> > 
> > import libvirt
> > ~~~~
> > conn=libvirt.openReadOnly("qemu+ssh://HOST_IP/system
> > <http://10.16.71.1/system>")
> > //now check the no. of connections (by lsof|grep ESTABLISHED in the
> > HOST), the count will increase by 1
> > conn.close()
> > *//the count will decrease by 1, it returns 0*
> > ~~~~
> > conn=libvirt.openReadOnly("qemu+ssh://HOST_IP/system
> > <http://10.16.71.1/system>")
> > //now check the no. of connections, the count will increase by 1
> > dom=conn.lookupByName("sowmya")
> > print dom.info <http://dom.info/>()
> > conn.close()
> > *//the count will not change, it returns 1*
> > *
> > *
> > This is creating a lot of trouble to me but the reason is unknown.
> > If someone could please point me out, if i am missing something.
> > --
> > Jatin
> 
> conn.close() returns the number of references to connection object;
> So if the latter example returns 1 it is right as you still have domain
> object which you obtained via lookupByName(). So you need to destroy
> that object prior to closing connection.

It is probably sufficient to just do

   dom = None

to force immediate garbage collection of the 'dom' object

Daniel
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