On Sun, Jan 1, 2017, at 09:13 PM, Jeffrey Zhang wrote: > Checked more failed gate, here is the more info: > > 1. only rax-iad has such issue > 2. the failed and successful gates have the same rpm installed. > > So the only difference between failed gate and successful gate is the xen > hypervisor. I don't have any answers but my first thought was maybe it is related to https://bugs.launchpad.net/nova/+bug/1643911; however, that affects libvirt 1.3.1 on Ubuntu Xenial and there is at least one instance of that occurring on a non Xen hypervisor so maybe they are not related. Also noticed that you appear to have two redundant sets of system logs in the Kolla centos job(s). See http://logs.openstack.org/80/415880/1/check/gate-kolla-dsvm-deploy-centos-binary-centos-7-nv/d94c349/logs/system_log/ and http://logs.openstack.org/80/415880/1/check/gate-kolla-dsvm-deploy-centos-binary-centos-7-nv/d94c349/logs/system_logs/. As for debugging this you may be able to install libvirt's debugging symbols (http://debuginfo.centos.org/7/x86_64/libvirt-debuginfo-2.0.0-10.el7.x86_64.rpm), capture a core dump, load into gdb and go from there. Clark