Why do I see getHardwareInfo errors in logs of vdsm in RHEL 7.4 hosts running RHEV 3.6?

Issue

• The following errors can be seen in vdsm.log after updating RHEV 3.6 hosts to RHEL 7.4:

Thread-28059::DEBUG::2017-07-03 17:22:03,773::bindingxmlrpc::1273::vds::(wrapper) client [127.0.0.1]::call getHardwareInfo with () {}
Thread-28059::ERROR::2017-07-03 17:22:03,804::API::1350::vds::(getHardwareInfo) failed to retrieve hardware info
Traceback (most recent call last):
  File "/usr/share/vdsm/API.py", line 1347, in getHardwareInfo
    hw = supervdsm.getProxy().getHardwareInfo()
  File "/usr/share/vdsm/supervdsm.py", line 50, in __call__
    return callMethod()
  File "/usr/share/vdsm/supervdsm.py", line 48, in <lambda>
    **kwargs)
  File "<string>", line 2, in getHardwareInfo
  File "/usr/lib64/python2.7/multiprocessing/managers.py", line 773, in _callmethod
    raise convert_to_error(kind, result)
IndexError: list assignment index out of range

• Manually running `` fails:

# vdsClient -s 0 getVdsHardwareInfo
Failed to read hardware information