[libvirt] problems starting several qemu VMS simultaneously

[Wen Congyang]

At 03/22/2012 06:54 AM, Serge Hallyn Wrote:
> Hi,
> 
> I grabbed today's git head of libvirt.  Created a VM (clean install of
> ubuntu oneiric, installed through virt-manager), and cloned it 3 times.
> Then I did
> 
> serge at ubuntu:~$ for i in `seq 1 4`; do virsh start o$i  > /tmp/o$i 2>&1 & done
> [1] 12184
> [2] 12185
> [3] 12186
> [4] 12187
> serge at ubuntu:~$ virsh list
> error: Failed to list active domains
> error: End of file while reading data: Input/output error

I cannot reproduce this problem on RHEL6.

> 
> serge at ubuntu:~$ virsh list
>  Id    Name                           State
> ----------------------------------------------------
>  5     o2                             shut off
>  7     o3                             shut off
>  8     o4                             shut off
> 
> [1]   Exit 1                  virsh start o$i > /tmp/o$i 2>&1
> [2]   Done                    virsh start o$i > /tmp/o$i 2>&1
> serge at ubuntu:~$ virsh list
>  Id    Name                           State
> ----------------------------------------------------
>  5     o2                             running
>  7     o3                             running
>  8     o4                             running
> 
> [3]-  Done                    virsh start o$i > /tmp/o$i 2>&1
> [4]+  Done                    virsh start o$i > /tmp/o$i 2>&1
> serge at ubuntu:~$ cat /tmp/o1
> error: Failed to start domain o1
> error: Unable to wait for child process: Bad file descriptor
> 
> It's quite reproducible.  An ubuntu bug report was filed at
> https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/961217
> 
> It's also very reminiscent of some lxc startup handshake issues
> which have been fixed.
> 
> You can find the last chunk of the log file at
> http://people.canonical.com/~serge/libvirtd-parallel-startup.log

This url cannot be opened:
You don't have permission to access /~serge/libvirtd-parallel-startup.log on this server.

Thanks
Wen Congyang

> 
> -serge
> 
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