On 5/15/22 11:48 AM, Digimer wrote:> Hi all,
>
> ? I've got a series of programs that monitor various things on a
CentOS
> Stream 8 VM host. All of these scripts work when called directly.
> However, when I have a parent program that calls all the little programs
> in series, I found that some virsh calls hang.
Is your script being called from a libvirt "hook" script?
(https://libvirt.org/hooks.html )If so, that won't work - a libvirt hook
script is called from within libvirt, and can't call back into libvirt.
Other than that, is there anything different about the context the
script is being run from vs. the context you're directly running virsh from?
>
> ? Initially, there were two scripts that were hanging repeatedly. Once
> called 'virsh net-list --all --name', so I changed it to check for
> configs in '/etc/libvirt/qemu/networks/', and that script started
> working. The other script though calls 'virsh list --all', and that
> can't be easily swapped out, so I really need to find the source of
> these hangs.
>
> ? Whenever the hang happens, about 30~45 seconds later, I see
> 'libvirtd[1643714]: Cannot recv data: Connection reset by peer'.
>
> ? I think the issue is striking other scripts that run, but this
> scenario is happening predictably and consistently right now.
>
> ? I thought it might be a concurrent connect limit or a problem with
> how many times virsh is called by a script, so I wrote a test script
> that kept calling 'virsh list --all' each second, but it was close
to
> 100 calls without hanging, far more that all the calls in my scripts
> combined, so I don't think that's it.
>
> Any advice/guidance would be very much appreciated!
>
> --
> Digimer
> Papers and Projects:https://alteeve.com/w/
> "I am, somehow, less interested in the weight and convolutions of
Einstein?s brain than in the near certainty that people of equal talent have
lived and died in cotton fields and sweatshops." - Stephen Jay Gould
>