VMAX: IG error: 'NoneType' object has no attribute '__getitem__'

[Carl Pecinovsky]

Using Queens FC VMAX driver. Initialize connection can result in the failure:

2018-10-23 10:26:21.081 68231 ERROR cinder.volume.manager File "/usr/lib/python2.7/site-packages/cinder/volume/drivers/dell_emc/vmax/rest.py", line 1322, in get_initiator_list
2018-10-23 10:26:21.081 68231 ERROR cinder.volume.manager init_list = init_dict['initiatorId']
2018-10-23 10:26:21.081 68231 ERROR cinder.volume.manager TypeError: 'NoneType' object has no attribute '__getitem__'

code:

        init_dict = self.get_resource(array, SLOPROVISIONING, 'initiator',
                                      params=params, version=version)
        try:
            init_list = init_dict['initiatorId']
        except KeyError:
            init_list = []

init_dict could be None if backend did not return a 200 OK response. For example, the resource is not found. Need to account for this case as well and return empty list.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/615307

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/615307
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=c3149ebc40110fb903966f64ee03c8489a061623
Submitter: Zuul
Branch: master

commit c3149ebc40110fb903966f64ee03c8489a061623
Author: Helen Walsh <email address hidden>
Date: Fri Nov 2 20:37:19 2018 +0000

    VMAX driver - allow for a clean system with no initiator groups

    Currenty not allowing for a system with no initiator groups so in this
    empty list case an unhandled exception is thrown.

    Change-Id: I7fdfb71ce34aeebdaf23718727a938e9c450f615
    Closes-Bug: #1800005

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/cinder 14.0.0.0rc1 release candidate.