We've seen this exact issue on 5.3 and 5.4 in the same scenario (KVM VM) and I was actually going to pose the same question you did after testing 5.5 later today. Our VMs are running as routers in an openstack cluster and it appeared to us that it was a lack of activity that caused the network failures because the moment I put some monitoring in place (which simply runs a ping from inside the VM at a regular interval), the problem seems to have gone away. That's obviously not a great solution...
On Wed, May 28, 2014 at 10:55 AM, Michael W. Lucas <[email protected]> wrote: > Hi, > > I have a 5.5/amd64 KVM VM running Ansible. Most of the time, it works > great. It's running the amd64 snapshot dated 27 May, from > ftp3.usa.openbsd.org. > > When I attempt to use the squid proxy to download large files from the > Internet, however, I occasionally get stalls. > > This is most easily reproduced when doing an upgrade. During my last > couple of upgrades, I've repeatedly done ^Z and "ifconfig vio0 down && > ifconfig vio0 up && fg" to make the download resume mid-set. > > Very occasionally, it happens during normal use. > > tcpdump on the proxy shows the proxy sending packets, but the OpenBSD > box not responding. My other terminal sessions hang, and I can no > longer SSH to the OpenBSD box. > > This doesn't happen on any of my other systems, so I'm inclined to > think it's vio(4) related. > > Any suggestions on how to debug this? > > Thanks, > ==ml > > -- > Michael W. Lucas - [email protected], Twitter @mwlauthor > http://www.MichaelWLucas.com/, http://blather.MichaelWLucas.com/
