Error:

0(root@afs-c3-git /etc/gitlab)$ gitlab-rake gitlab:ldap:check
[D, [2017-04-05T09:18:12.660495 #20025] DEBUG -- sentry: ** [Raven] Invalid filter syntax. excluded from capture due to environment or should_capture callback
rake aborted!
Net::LDAP::FilterSyntaxInvalidError: Invalid filter syntax.
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/ldap/config.rb:90:in `constructed_user_filter'
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/ldap/config.rb:185:in `omniauth_user_filter'
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/ldap/config.rb:54:in `omniauth_options'
/opt/gitlab/embedded/service/gitlab-rails/config/initializers/devise.rb:218:in `block (2 levels) in <top (required)>'
/opt/gitlab/embedded/service/gitlab-rails/config/initializers/devise.rb:216:in `each'
/opt/gitlab/embedded/service/gitlab-rails/config/initializers/devise.rb:216:in `block in <top (required)>'
/opt/gitlab/embedded/service/gitlab-rails/config/initializers/devise.rb:3:in `<top (required)>'
/opt/gitlab/embedded/service/gitlab-rails/config/environment.rb:5:in `<top (required)>'
/opt/gitlab/embedded/bin/bundle:22:in `load'
/opt/gitlab/embedded/bin/bundle:22:in `<main>'
Tasks: TOP => gitlab:ldap:check => environment
(See full trace by running task with --trace)


gitlab_rails['ldap_enabled'] = true
gitlab_rails['ldap_servers'] = YAML.load <<-'EOS'
  main:
    label: 'LDAP'
    host: '10.x.x.x'
    port: 389
    uid: 'gitldap'
    method: 'plain' # "tls" or "ssl" or "plain"
    bind_dn: 'CN=GIT LDAP,OU=C3_APP_USERS,OU=C3_USER_REPO,DC=C3,DC=LOCAL'
    password: 'password'
    active_directory: true
    allow_username_or_email_login: false
    block_auto_created_users: false
    base: 'DC=C3,DC=LOCAL'
    user_filter: 'user'
    attributes:
      username: ['uid', 'userid', 'sAMAccountName']
      email: ['mail', 'email', 'userPrincipalName']
      name:  'GIT LDAP'
      first_name: 'SVC_'
      last_name: 'GIT LDAP'
    ## EE only
    group_base: 'DC=C3,DC=LOCAL'
    admin_group: 'GIT_Admin'
    sync_ssh_keys: false
  secondary: # 'secondary' is the GitLab 'provider ID' of second LDAP server
    label: 'LDAP'
    host: '10.x.x.x'
    port: 389
    uid: 'gitldap'
    method: 'plain' # "tls" or "ssl" or "plain"
    bind_dn: 'CN=GIT LDAP,OU=C3_APP_USERS,OU=C3_USER_REPO,DC=C3,DC=LOCAL'
    password: 'password'
    active_directory: true
    allow_username_or_email_login: false
    block_auto_created_users: false
    base: 'DC=C3,DC=LOCAL'
    user_filter: 'user'
    attributes:
    attributes:
      username: ['uid', 'userid', 'sAMAccountName']
      email: ['mail', 'email', 'userPrincipalName']
      name: 'GIT LDAP'
      first_name: 'SVC_'
      last_name: 'GIT LDAP'
  EOS