Re: [libvirt] error: server response too large

On Mon, Sep 30, 2013 at 05:23:33PM +0200, Michal Privoznik wrote: > On 30.09.2013 17:02, Claudio Bley wrote: > > Hi. > > > > When trying to do a screenshot of a remote domain connected via > > qemu+tcp (for testing purposes only), I receive this error: > > > > ---------------------------------------------------------------------- > > virsh -c qemu+tcp://dev/system > > Welcome to virsh, the virtualization interactive terminal. > > > > Type: 'help' for help with commands > > 'quit' to quit > > > > virsh # version > > Compiled against library: libvir 0.9.8 > > Using library: libvir 0.9.8 > > Using API: QEMU 0.9.8 > > Running hypervisor: QEMU 1.5.1 > > > > virsh # screenshot 2 /tmp/screendump > > error: could not receive data from domain 2 > > error: packet 1048600 bytes received from server too large, want 262144 > > > > virsh # 2013-09-30 14:47:05.158+0000: 21646: info : libvirt version: 0.9.8 > > 2013-09-30 14:47:05.158+0000: 21646: warning : virNetClientIncomingEvent:1660 : Something went wrong during async message processing > > ---------------------------------------------------------------------- > > > > I'm using Ubuntu LTS 12.04.3, latest version in the repo which is > > 0.9.8-2ubuntu17.13. > > This works as expected. 0.9.8 still had a small buffer for RPC messages. > It's since 0.9.13 release that we've switched to dynamically allocated > buffer and hence could size up the limit for incoming data. Update the > client and problem will just go away. Actually that is not working as expected. The old client should *always* be able to talk to a new server. If the new server is unconditionally sending back data that is too large for the client, this is a bug.