[libvirt-users] Unable to close open libvirt connections
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() 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
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. Michal
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 -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|
Thanks, setting dom=None solved the problem. But that needs to make alot of changes in the code. Do we have any other alternative ? -- Jatin On Thu, Jan 12, 2012 at 3:46 PM, Daniel P. Berrange <berrange@redhat.com>wrote:
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 -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/:| |: http://libvirt.org -o- http://virt-manager.org:| |: http://autobuild.org -o- http://search.cpan.org/~danberr/:| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc:|
On Thu, Jan 12, 2012 at 04:58:03PM +0530, Jatin Kumar wrote:
Thanks, setting dom=None solved the problem. But that needs to make alot of changes in the code. Do we have any other alternative ?
Well python should garbage collect them when the variables go out of scope. When all 'dom' are garbage collected, then the connection will be garbage collected too & the close() will thus take effect Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|
participants (3)
-
Daniel P. Berrange -
Jatin Kumar -
Michal Privoznik