Openstack horizon returns Danger there was an error submitting the form when add users to projects

Solution Verified - Updated -

Issue

  • When try to add user to project, the user will be added to the project.
  • But horizon will hang for a minute then display an error
    Danger: there was an error submitting the form
  • This can happen because there are too many groups for horizon to process in 1 minute and the default timeout for httpd is 60 seconds

Environment

  • Red Hat OpenStack Platform 16.1
  • External LDAP authentication

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