Re: [Xen-devel] [xen-unstable test] 35257: regressions - FAIL

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Feb 27, 2015 at 09:42:29AM +0000, Ian Campbell wrote:
> On Thu, 2015-02-26 at 20:14 +0000, xen.org wrote:
> > flight 35257 xen-unstable real [real]
> > http://www.chiark.greenend.org.uk/~xensrcts/logs/35257/
> > 
> > Regressions :-(
> > 
> > Tests which did not succeed and are blocking,
> > including tests which could not be run:
> >  test-armhf-armhf-libvirt     12 guest-start.2             fail REGR. vs. 
> > 34629
> 
> logs:
> http://www.chiark.greenend.org.uk/~xensrcts/logs/35257/test-armhf-armhf-libvirt/info.html
> 
> http://www.chiark.greenend.org.uk/~xensrcts/logs/35257/test-armhf-armhf-libvirt/12.ts-guest-start.log
>         2015-02-23 20:21:48 Z executing ssh ... root@xxxxxxxxxxxxx virsh 
> domxml-from-native xen-xl /etc/xen/debian.guest.osstest.cfg > 
> /etc/xen/debian.guest.osstest.cfg.xml
>         error: failed to connect to the hypervisor
>         error: no valid connection
>         error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': 
> Connection refused
> 
> http://www.chiark.greenend.org.uk/~xensrcts/logs/35257/test-armhf-armhf-libvirt/marilith-n4-output-ps_wwwaxf_-eo_pid%2Ctty%2Cstat%2Ctime%2Cnice%2Cpsr%2Cpcpu%2Cpmem%2Cnwchan%2Cwchan%2325%2Cargs
> appears to show no libvirtd process.
> 
> http://www.chiark.greenend.org.uk/~xensrcts/logs/35257/test-armhf-armhf-libvirt/marilith-n4---var-log-libvirt-libvirtd.log
> says:
>         2015-02-23 20:13:15.556+0000: 2133: info : libvirt version: 1.2.13
>         2015-02-23 20:13:15.556+0000: 2133: error : 
> dnsmasqCapsRefreshInternal:726 : Cannot check dnsmasq binary dnsmasq: No such 
> file or directory
>         2015-02-23 20:13:15.845+0000: 2133: error : 
> virFirewallValidateBackend:193 : direct firewall backend requested, but 
> /sbin/ebtables is not available: No such file or directory
>         
> I think these are just spurious.
> 
>         2015-02-23 20:13:15.845+0000: 2133: error : virFirewallApply:936 : 
> out of memory
>         
> 
>         2015-02-23 20:13:16.092+0000: 2133: error : virExec:491 : Cannot find 
> 'pm-is-supported' in path: No such file or directory
>         2015-02-23 20:13:16.092+0000: 2133: warning : virQEMUCapsInit:999 : 
> Failed to get host power management capabilities
>         
> As are these two.
>         
>         2015-02-23 20:13:16.400+0000: 2133: error : virFirewallApply:936 : 
> out of memory
> 

Last time Ian and I debugged a libvirt crashing bug, "out of memory"
didn't cause libvirtd to exit. It turned out it's some bug in libxl
event machinery that caused libvirt to exit, but the assertion message
was not shown anywhere.

I think we might need to login to that host and run libvirtd in
foreground to determine what goes wrong.

Wei.


> Has these OOM messages resulted in libvirtd exiting? I don't see any
> evidence of a crash elsewhere in the logs (i.e. no "process segfaulted"
> in dmesg, no OOM killing going on etc).
> 
> We don't seem to collect dom0 freemem info, but that most likely
> wouldn't help given the libvirtd process has exited.
> 
> Any ideas where to look next?
> 
> Ian.
> 
> 
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