synchronized private LdapServerProperties getLdapProperties() {
    if (ldapServerProperties == null) {
      ldapServerProperties = getConfiguration().getLdapServerProperties();
    }
    return ldapServerProperties;
  }
Load the initial LDAP configuration if the JPA infrastructure is initialized.
ambari-server/src/main/java/org/apache/ambari/server/security/ldap/AmbariLdapDataPopulator.java