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[Launchpad Bug Tracker <1794534@xxxxxxxxxxxxxxxxxx>]

[Expired for OpenStack Dashboard (Horizon) because there has been no
activity for 60 days.]

** Changed in: horizon
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1794534

Title:
  first load of launch instance is missing tabs if
  LAUNCH_INSTANCE_DEFAULTS.enable_scheduler_hints is False

Status in OpenStack Dashboard (Horizon):
  Expired

Bug description:
  If LAUNCH_INSTANCE_DEFAULTS.enable_scheduler_hints = False in
  local_settings.py, the first time launch instance is used, some tabs
  are missing.

  This seems to be intermittent with Chrome browser, but reproducible
  every time with MS Edge browser.

  Closing the launch instance dialog, and opening it again almost always
  results in proper display.

  Full refresh of the instances page, and clicking the launch instance
  dialog again reintroduces the issue.

  It appears that this issue may have been introduced by the code for
  "Choose a server group when booting a VM with NF Launch instance"
  https://github.com/openstack/horizon/commit/cf91124d0c97ae80c565ba0b03a41aa2579b998c
  #diff-925f277526c87432c7733408f990be2f

  The server group code appears to share some of the scheduler hints
  code and variables, but there is no LAUNCH_INSTANCE_DEFAULTS
  configuration option to disable the server group tab.

  I've been able to reproduce this with a fresh install of RDO packages
  for Queens on CentOS, with only required environment configuration
  changes.

  Not seeing any error messages logged in horizon logs, or javascript
  errors in the browser.

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