virt-who errors

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Hi!

I'm seeing error logs on my RHEL7 VM relating to virt-who. I've already tried the steps in https://access.redhat.com/solutions/1443193, but nothing seems to be working.
Any suggestions?

Feb 14 02:10:18 roc-n2dns02 /usr/bin/virt-who: [ERROR] @virt.py:379 - Virt backend 'env/cmdline' fails with exception:#012libvirtError: Unable to setup wakeup pipe: Too many open files
Feb 14 02:10:18 roc-n2dns02 /usr/bin/virt-who: [INFO] @virt.py:392 - Waiting 60 seconds before retrying backend 'env/cmdline'

EC

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