Configuration RabbitMQ LDAP-未找到LDAP服务器

似乎无法让这两个插件（后端缓存和后端ldap）一起工作。我当前的ldap配置是：

     ,{auth_backends, [rabbit_auth_backend_internal, rabbit_auth_backend_ldap,rabbit_auth_backend_cache]}
  ]},
  {rabbitmq_auth_backend_cache, [
                                  {cached_backend, rabbit_auth_backend_ldap},{cache_ttl, 180000}
                                ]
  },
   {rabbit_auth_backend_ldap, [
    {servers, ["company.ldap.okta-emea.com"]},
          {dn_lookup_bind_user_dn, "uid=company-services-ldap-user@company.com, dc=company, dc=okta-emea,dc=com"},
          {dn_lookup_base, "ou=groups,dc=company,dc=okta-emea,dc=com"},
          {dn_lookup_attribute, "uid"},
          {dn_lookup_bind_password, "password"},
          {user_dn_pattern, "uid=${username}@company.com,ou=groups,dc=company,dc=okta-emea,dc=com"},
          {use_ssl, true},
          {port, 636},
          {log, true},
          {vhost_access_query,  {constant, true}},
          {resource_access_query, {for, [
            {permission, configure, {in_group, "cn=rabbitmq-readers,ou=groups,dc=company,dc=okta-emea,dc=com","uniquemember"}},
            {permission, write, {for, [
              {resource, queue, {in_group, "cn=rabbitmq-readers,ou=groups,dc=company,dc=okta-emea,dc=com","uniquemember"}},
              {resource, exchange, {in_group, "cn=rabbitmq-readers,ou=groups,dc=company,dc=okta-emea,dc=com","uniquemember"}}]}},
            {permission, read, {for, [
              {resource, exchange, {constant, true}},
              {resource, queue,    {constant, true}}]}}
          ]}},
            {tag_queries,  [{administrator, {in_group, "cn=rabbitmq-admins-dev,ou=groups,dc=company,dc=okta-emea,dc=com","uniquemember"}},
            {monitoring,{constant, true}}]}
  ]}
  ].

这在我的日志中提供了“HTTP访问被拒绝：兔子\u身份验证\u后端\u缓存验证api失败用户：未定义\u ldap\u服务器”。为什么?

在本例中—

---

代码块将{rabbitmq_auth_backend_ldap，[]}作为“rabbitmq_auth_backend_cache”部分的一部分，但我在文档中没有看到这一点。

这种问题实际上属于Serverfault，因为它实际上与编程无关。