When SRP pool info can't be update, update_volume_stats() blows up every periodic cycle.
2018-10-31 13:43:51.867 60451 DEBUG cinder.volume.drivers.dell_emc.vmax.rest [req-38ccd0ba-b63e-44bd-adec-e097f72908b2 - - - - -] GET request to httpspvc://9.3.18.68:8443/univmax/restapi/84/sloprovisioning/symmetrix/000196800573/srp/SRP_1 has returned with a status code of: 503. request /usr/lib/python2.7/site-packages/cinder/volume/drivers/dell_emc/vmax/rest.py:138
2018-10-31 13:43:51.868 60451 DEBUG cinder.volume.drivers.dell_emc.vmax.rest [req-38ccd0ba-b63e-44bd-adec-e097f72908b2 - - - - -] Get resource failed with Bad or unexpected response from the storage volume backend API: Error get srp. The status code received is 503 and the message is None. _get_request /usr/lib/python2.7/site-packages/cinder/volume/drivers/dell_emc/vmax/rest.py:316
2018-10-31 13:43:51.869 60451 ERROR cinder.volume.drivers.dell_emc.vmax.provision [req-38ccd0ba-b63e-44bd-adec-e097f72908b2 - - - - -] Unable to retrieve srp instance of SRP_1 on array 000196800573.
2018-10-31 13:43:51.869 60451 WARNING powervc_cinder.volume.manager [req-38ccd0ba-b63e-44bd-adec-e097f72908b2 - - - - -] Caught Exception Refreshing Driver Status: too many values to unpack
code:
LOG.error("Unable to retrieve srp instance of %(srpName)s on "
"array %(array)s.",
{'srpName': srp, 'array': array})
return 0, 0, 0, 0, False
Caller expects 4 returned values, not 5.
