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[OpenStack Infra <1592940@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/334335
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=6f982b3ead5beff7ae68ff70ea8e63da5acc05b2
Submitter: Jenkins
Branch:    master

commit 6f982b3ead5beff7ae68ff70ea8e63da5acc05b2
Author: Timur Sufiev <tsufiev@xxxxxxxxxxxx>
Date:   Fri Jun 17 13:50:12 2016 +0300

    Fix duplicating <network_entity>_list() calls in api.network
    
    The solution is trivial - to add @memoize decorator to the following
    calls:
    * api.neutron.subnet_list
    * api.neutron.port_list
    * api.network.tenant_floating_ip_list
    * api.network.security_group_list
    
    Closes-Bug: #1592940
    Co-Authored-By: Ivan Kolodyazhny <e0ne@xxxxxxxxx>
    Change-Id: Ibc0d227e07adfcc18bd2d0ed114d1da0f4ff04ad


** Changed in: horizon
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1592940

Title:
  Horizon makes duplicated and extra requests

Status in OpenStack Dashboard (Horizon):
  Fix Released

Bug description:
  Horizon Liberty

  User reports slowness of the dashboard for most of the tabs.
  Investigation shows that Horizon makes duplicated requests when it is trying to request information related to the networking. It also waits for about 4 seconds right after the initial user's successfull authentication before it proceeds with the first API call.

  Here is the log of Horizon representing the delay:

  2016-06-15 18:24:16,385 113992 DEBUG openstack_auth.backend Beginning user authentication
  2016-06-15 18:24:16,387 113992 DEBUG openstack_auth.plugin.password Attempting to authenticate for admin
  2016-06-15 18:24:16,387 113992 DEBUG keystoneclient.auth.identity.v3.base Making authentication request to http://192.168.210.69:5000/v3/auth/tokens
  2016-06-15 18:24:16,481 113992 DEBUG keystoneclient.session REQ: curl -g -i --insecure -X GET http://192.168.210.69:5000/v3/ -H "Accept: application/j
  son" -H "User-Agent: python-keystoneclient"
  2016-06-15 18:24:16,503 113992 DEBUG keystoneclient.session RESP: [200] content-length: 253 vary: X-Auth-Token server: Apache connection: close date: 
  Wed, 15 Jun 2016 18:24:16 GMT content-type: application/json x-openstack-request-id: req-258d4e76-6500-414d-a565-0788dc0d4f90 
  RESP BODY: {"version": {"status": "stable", "updated": "2015-03-30T00:00:00Z", "media-types": [{"base": "application/json", "type": "application/vnd.o
  penstack.identity-v3+json"}], "id": "v3.4", "links": [{"href": "http://192.168.210.69:5000/v3/";, "rel": "self"}]}}

  2016-06-15 18:24:16,503 113992 DEBUG keystoneclient.session REQ: curl -g -i --insecure -X GET http://192.168.210.69:5000/v3/users/51e3873fe48f4948bef2
  32865c7bc84f/projects -H "User-Agent: python-keystoneclient" -H "Accept: application/json" -H "X-Auth-Token: {SHA1}561e3b22c0693b6ff8dfad099a2492d95ed
  8e9c1"
  2016-06-15 18:24:16,561 113992 DEBUG keystoneclient.session RESP: [200] content-length: 412 vary: X-Auth-Token server: Apache connection: close date: 
  Wed, 15 Jun 2016 18:24:16 GMT content-type: application/json x-openstack-request-id: req-765b3844-feb3-40b9-a843-f5cc2341afde 
  RESP BODY: {"links": {"self": "http://192.168.210.69:5000/v3/users/51e3873fe48f4948bef232865c7bc84f/projects";, "previous": null, "next": null}, "proje
  cts": [{"is_domain": false, "description": "admin tenant", "links": {"self": "http://192.168.210.69:5000/v3/projects/49cdffc876ca4927af2ea7505ad27264";
  }, "enabled": true, "id": "49cdffc876ca4927af2ea7505ad27264", "parent_id": null, "domain_id": "default", "name": "admin"}]}

  2016-06-15 18:24:16,561 113992 DEBUG keystoneclient.auth.identity.v3.base Making authentication request to http://192.168.210.69:5000/v3/auth/tokens
  2016-06-15 18:24:16,657 113992 DEBUG openstack_auth.backend Authentication completed.
  2016-06-15 18:24:16,657 113992 INFO openstack_auth.forms Login successful for user "admin".
  2016-06-15 18:24:20,167 113996 DEBUG neutronclient.client REQ: curl -i https://domain.com:9696/v2.0/extensions.json -X GET -H "User-Agent: pyt
  hon-neutronclient" -H "X-Auth-Token: {SHA1}04486c34b57ca19787b77e6d5e6e9fad48914b67"

  Last 2 rows represent the issue.

  I'll attach parsed logs for each tab opening in order to show
  duplicated requests.

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