What may cause in being Unable to list overcloud heat resources

Solution Verified - Updated -

Issue

  • When trying to list resources of overcloud stack it gives back an error message and does not show the resources.

    $ openstack stack resource list overcloud
    ERROR: The server could not comply with the request since it is either malformed or otherwise incorrect.
    
  • In the heat api logs, following error is observed.

    File "/usr/lib/python2.7/site-packages/heat/engine/resource.py", line 659, in required_by if r.id in self.needed_by]
    TypeError: argument of type 'NoneType' is not iterable
    

Environment

  • Red Hat OpenStack Platform 10.0

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