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[OpenStack Infra <1559072@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/541170
Committed: https://git.openstack.org/cgit/openstack/python-troveclient/commit/?id=0b28b04ebbfaed981f4e00e69e4c7a8e0ed75395
Submitter: Zuul
Branch:    master

commit 0b28b04ebbfaed981f4e00e69e4c7a8e0ed75395
Author: Zhao Chao <zhaochao1984@xxxxxxxxx>
Date:   Tue Feb 6 15:31:42 2018 +0800

    Handle error response for webob>=1.6.0
    
    WebOb change https://github.com/Pylons/webob/pull/230 changed
    the way in which the error response body is formatted such that
    it's no longer a nested dict. So we have to handle both the
    old convention of an error message key to the response body error
    dict and the new way with just the error body dict.
    
    This was reported upstream:
    https://github.com/Pylons/webob/issues/235
    
    But given this was apparently implemented as a long-overdue change
    in WebOb the behavior is not likely to change.
    
    Change-Id: Id8bfde6277640de48768bbe5a5e4252b97253ed2
    Closes-Bug: #1559072
    Co-Authored-By: Matt Riedemann <mriedem@xxxxxxxxxx>
    Signed-off-by: Zhao Chao <zhaochao1984@xxxxxxxxx>


** Changed in: python-troveclient
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1559072

Title:
  [SRU] exceptions.from_response with webob 1.6.0 results in
  "AttributeError: 'unicode' object has no attribute 'get'"

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive mitaka series:
  Fix Released
Status in Ubuntu Cloud Archive newton series:
  Fix Released
Status in Ubuntu Cloud Archive ocata series:
  Fix Released
Status in Ubuntu Cloud Archive pike series:
  Fix Released
Status in networking-midonet:
  Fix Released
Status in python-cinderclient:
  Fix Released
Status in python-novaclient:
  Fix Released
Status in python-openstackclient:
  Invalid
Status in python-troveclient:
  Fix Released
Status in python-cinderclient package in Ubuntu:
  Fix Released
Status in python-novaclient package in Ubuntu:
  Fix Released
Status in python-cinderclient source package in Xenial:
  Fix Released
Status in python-novaclient source package in Xenial:
  Fix Released
Status in python-cinderclient source package in Yakkety:
  Won't Fix
Status in python-novaclient source package in Yakkety:
  Fix Released
Status in python-cinderclient source package in Zesty:
  Fix Released
Status in python-novaclient source package in Zesty:
  Fix Released

Bug description:
  [Impact] [Testcase]
  Running on Ubuntu 14.04.
  After installing nova from source in either the Liberty release or Mitaka, with WebOb 1.6.0, running any nova command generated this error:
  root@openstack-ubu-controller:~# nova service-list
  ERROR (AttributeError): 'unicode' object has no attribute 'get'

  The equivalent openstack commands work correctly. After downgrading
  WebOb to 1.5.1 AND restarting the nova-api service everything works.

  Detailed output from nova -debug service-list with the error:

  root@openstack-ubu-controller:~# nova --debug service-list
  DEBUG (extension:157) found extension EntryPoint.parse('v2token = keystoneauth1.loading._plugins.identity.v2:Token')
  DEBUG (extension:157) found extension EntryPoint.parse('admin_token = keystoneauth1.loading._plugins.admin_token:AdminToken')
  DEBUG (extension:157) found extension EntryPoint.parse('v3oidcauthcode = keystoneauth1.loading._plugins.identity.v3:OpenIDConnectAuthorizationCode')
  DEBUG (extension:157) found extension EntryPoint.parse('v2password = keystoneauth1.loading._plugins.identity.v2:Password')
  DEBUG (extension:157) found extension EntryPoint.parse('v3password = keystoneauth1.loading._plugins.identity.v3:Password')
  DEBUG (extension:157) found extension EntryPoint.parse('v3oidcpassword = keystoneauth1.loading._plugins.identity.v3:OpenIDConnectPassword')
  DEBUG (extension:157) found extension EntryPoint.parse('token = keystoneauth1.loading._plugins.identity.generic:Token')
  DEBUG (extension:157) found extension EntryPoint.parse('v3token = keystoneauth1.loading._plugins.identity.v3:Token')
  DEBUG (extension:157) found extension EntryPoint.parse('password = keystoneauth1.loading._plugins.identity.generic:Password')
  DEBUG (session:248) REQ: curl -g -i -X GET http://10.0.1.3:5000/v2.0 -H "Accept: application/json" -H "User-Agent: keystoneauth1/2.3.0 python-requests/2.9.1 CPython/2.7.6"
  INFO (connectionpool:207) Starting new HTTP connection (1): 10.0.1.3
  DEBUG (connectionpool:387) "GET /v2.0 HTTP/1.1" 200 334
  DEBUG (session:277) RESP: [200] Content-Length: 334 Vary: X-Auth-Token Keep-Alive: timeout=5, max=100 Server: Apache/2.4.7 (Ubuntu) Connection: Keep-Alive Date: Fri, 18 Mar 2016 12:41:58 GMT Content-Type: application/json x-openstack-request-id: req-a0c68cd5-ea29-4391-942f-130cc69d15f8
  RESP BODY: {"version": {"status": "stable", "updated": "2014-04-17T00:00:00Z", "media-types": [{"base": "application/json", "type": "application/vnd.openstack.identity-v2.0+json"}], "id": "v2.0", "links": [{"href": "http://10.0.1.3:5000/v2.0/";, "rel": "self"}, {"href": "http://docs.openstack.org/";, "type": "text/html", "rel": "describedby"}]}}

  DEBUG (v2:63) Making authentication request to http://10.0.1.3:5000/v2.0/tokens
  DEBUG (connectionpool:387) "POST /v2.0/tokens HTTP/1.1" 200 2465
  DEBUG (session:248) REQ: curl -g -i -X GET http://10.0.1.3:8774/v1.1/b77d640e127e488fb42a7c0716ba53a5 -H "User-Agent: python-novaclient" -H "Accept: application/json" -H "X-Auth-Token: {SHA1}381893576ad46c62b587f4963d769b89441b919a"
  INFO (connectionpool:207) Starting new HTTP connection (1): 10.0.1.3
  DEBUG (connectionpool:387) "GET /v1.1/b77d640e127e488fb42a7c0716ba53a5 HTTP/1.1" 404 112
  DEBUG (session:277) RESP: [404] Date: Fri, 18 Mar 2016 12:41:59 GMT Connection: keep-alive Content-Type: application/json; charset=UTF-8 Content-Length: 112 X-Compute-Request-Id: req-f10a2016-9a88-48fd-af1d-5f800fc9e11a
  RESP BODY: {"message": "The resource could not be found.<br /><br />\n\n\n", "code": "404 Not Found", "title": "Not Found"}

  DEBUG (shell:894) 'unicode' object has no attribute 'get'
  Traceback (most recent call last):
    File "/usr/local/lib/python2.7/dist-packages/novaclient/shell.py", line 892, in main
      OpenStackComputeShell().main(argv)
    File "/usr/local/lib/python2.7/dist-packages/novaclient/shell.py", line 726, in main
      api_version = api_versions.discover_version(self.cs, api_version)
    File "/usr/local/lib/python2.7/dist-packages/novaclient/api_versions.py", line 267, in discover_version
      client)
    File "/usr/local/lib/python2.7/dist-packages/novaclient/api_versions.py", line 248, in _get_server_version_range
      version = client.versions.get_current()
    File "/usr/local/lib/python2.7/dist-packages/novaclient/v2/versions.py", line 83, in get_current
      return self._get_current()
    File "/usr/local/lib/python2.7/dist-packages/novaclient/v2/versions.py", line 57, in _get_current
      return self._get(url, "version")
    File "/usr/local/lib/python2.7/dist-packages/novaclient/base.py", line 297, in _get
      _resp, body = self.api.client.get(url)
    File "/usr/local/lib/python2.7/dist-packages/keystoneauth1/adapter.py", line 173, in get
      return self.request(url, 'GET', **kwargs)
    File "/usr/local/lib/python2.7/dist-packages/novaclient/client.py", line 92, in request
      raise exceptions.from_response(resp, body, url, method)
    File "/usr/local/lib/python2.7/dist-packages/novaclient/exceptions.py", line 274, in from_response
      message = error.get('message')
  AttributeError: 'unicode' object has no attribute 'get'
  ERROR (AttributeError): 'unicode' object has no attribute 'get'

  Since nova-api must be restarted for this to either take effect or go
  away (with the WebOb downgrade) this appears to be an issue with the
  nova-api process. The failing message from the api service is 112
  bytes long while the successful one (using downgraded WebOb) is 52
  bytes long.

  [Regression Potential]
  The regression potential is minimal. The patch is cherry-picked without change from stable/newton to stable/mitaka, and I've already tested it in a ppa.

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