After upgrading ovirt cluster to 4.0 foreman can no longer properly communicate with the engine.

GUI shows errors like this:

There was an error listing VMs: undefined method `+' for nil:NilClass

In the logs:

2016-07-01 13:27:44 [app] [I] Started GET "/compute_resources/1-ovirt" for 192.168.0.8 at 2016-07-01 13:27:44 +0300
2016-07-01 13:27:44 [app] [I] Processing by ComputeResourcesController#show as HTML
2016-07-01 13:27:44 [app] [I]   Parameters: {"id"=>"1-ovirt"}
2016-07-01 13:27:44 [app] [I] Deface: [WARNING] No :original defined for 'remove_compute_profiles_tab', you should change its definition to include:
 |  :original => 'aecbf94e43770bf29957263a987790f7873c4fd6'
2016-07-01 13:27:44 [app] [I] Deface: [WARNING] No :original defined for 'rename_virtual_machines_containers', you should change its definition to include:
 |  :original => 'adff190a5a6ab59b88f6cf9956f23cd53db53248'
2016-07-01 13:27:44 [app] [I]   Rendered compute_resources/show/_ovirt.html.erb (1.2ms)
2016-07-01 13:27:44 [app] [I]   Rendered compute_resources/show.html.erb within layouts/application (43.7ms)
2016-07-01 13:27:44 [app] [I]   Rendered layouts/_application_content.html.erb (0.8ms)
2016-07-01 13:27:44 [app] [I]   Rendered home/_user_dropdown.html.erb (2.8ms)
2016-07-01 13:27:44 [app] [I] Read fragment views/tabs_and_title_records-3 (0.4ms)
2016-07-01 13:27:44 [app] [I]   Rendered home/_topbar.html.erb (5.1ms)
2016-07-01 13:27:44 [app] [I]   Rendered layouts/base.html.erb (7.4ms)
2016-07-01 13:27:44 [app] [I] Completed 200 OK in 124ms (Views: 78.5ms | ActiveRecord: 12.2ms)
2016-07-01 13:27:45 [app] [I] Started GET "/compute_resources/1-ovirt/images" for 192.168.0.8 at 2016-07-01 13:27:45 +0300
2016-07-01 13:27:45 [app] [I] Started GET "/compute_resources/1-ovirt/vms" for 192.168.0.8 at 2016-07-01 13:27:45 +0300
2016-07-01 13:27:45 [app] [I] Processing by ImagesController#index as HTML
2016-07-01 13:27:45 [app] [I]   Parameters: {"compute_resource_id"=>"1-ovirt"}
2016-07-01 13:27:45 [app] [I] Processing by ComputeResourcesVmsController#index as HTML
2016-07-01 13:27:45 [app] [I]   Parameters: {"compute_resource_id"=>"1-ovirt"}
2016-07-01 13:27:45 [app] [I]   Rendered images/index.html.erb within layouts/application (12.8ms)
2016-07-01 13:27:45 [app] [I]   Rendered layouts/_application_content.html.erb (0.7ms)
2016-07-01 13:27:45 [app] [I]   Rendered home/_user_dropdown.html.erb (2.7ms)
2016-07-01 13:27:45 [app] [I] Read fragment views/tabs_and_title_records-3 (0.3ms)
2016-07-01 13:27:45 [app] [I]   Rendered home/_topbar.html.erb (4.6ms)
2016-07-01 13:27:45 [app] [I]   Rendered layouts/base.html.erb (6.8ms)
2016-07-01 13:27:45 [app] [I] Completed 200 OK in 57ms (Views: 20.6ms | ActiveRecord: 7.4ms)
2016-07-01 13:27:45 [app] [W] Error has occurred while listing VMs on ovirt (oVirt)
 | NoMethodError: undefined method `+' for nil:NilClass
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbovirt-0.0.37/lib/ovirt/base_object.rb:13:in `parse_version'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbovirt-0.0.37/lib/ovirt/datacenter.rb:21:in `block in parse_xml_attributes!'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node_set.rb:187:in `block in each'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node_set.rb:186:in `upto'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node_set.rb:186:in `each'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbovirt-0.0.37/lib/ovirt/datacenter.rb:20:in `collect'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbovirt-0.0.37/lib/ovirt/datacenter.rb:20:in `parse_xml_attributes!'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbovirt-0.0.37/lib/ovirt/datacenter.rb:8:in `initialize'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbovirt-0.0.37/lib/client/datacenter_api.rb:16:in `new'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbovirt-0.0.37/lib/client/datacenter_api.rb:16:in `block in datacenters'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node_set.rb:187:in `block in each'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node_set.rb:186:in `upto'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/nokogiri-1.6.6.2/lib/nokogiri/xml/node_set.rb:186:in `each'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbovirt-0.0.37/lib/client/datacenter_api.rb:15:in `collect'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rbovirt-0.0.37/lib/client/datacenter_api.rb:15:in `datacenters'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/fog-1.37.0/lib/fog/ovirt/requests/compute/datacenters.rb:6:in `datacenters'
 | /usr/share/foreman/app/models/compute_resources/foreman/model/ovirt.rb:262:in `client'
 | /usr/share/foreman/app/models/compute_resource.rb:136:in `vms'
 | /usr/share/foreman/app/controllers/compute_resources_vms_controller.rb:4:in `index'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/abstract_controller/base.rb:189:in `process_action'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_controller/metal/rendering.rb:10:in `process_action'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:113:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:113:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:299:in `block (2 levels) in halting'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rails-observers-0.1.2/lib/rails/observers/action_controller/caching/sweeping.rb:73:in `around'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:447:in `public_send'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:447:in `block in make_lambda'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:298:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:298:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:299:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:299:in `block (2 levels) in halting'
 | /usr/share/foreman/app/controllers/concerns/application_shared.rb:13:in `set_timezone'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:424:in `block in make_lambda'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:298:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:298:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:149:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:149:in `block in halting_and_conditional'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:149:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:149:in `block in halting_and_conditional'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:149:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:149:in `block in halting_and_conditional'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:229:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:229:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:149:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:149:in `block in halting_and_conditional'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:299:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:299:in `block (2 levels) in halting'
 | /usr/share/foreman/app/models/concerns/foreman/thread_session.rb:32:in `clear_thread'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:424:in `block in make_lambda'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:298:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:298:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:229:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:229:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:299:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:299:in `block (2 levels) in halting'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/rails-observers-0.1.2/lib/rails/observers/action_controller/caching/sweeping.rb:73:in `around'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:447:in `public_send'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:447:in `block in make_lambda'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:298:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:298:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:166:in `block in halting'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:86:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:86:in `run_callbacks'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/abstract_controller/callbacks.rb:19:in `process_action'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_controller/metal/rescue.rb:29:in `process_action'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_controller/metal/instrumentation.rb:31:in `block in process_action'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/notifications.rb:159:in `block in instrument'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/notifications.rb:159:in `instrument'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activerecord-4.1.5/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/abstract_controller/base.rb:136:in `process'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionview-4.1.5/lib/action_view/rendering.rb:30:in `process'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_controller/metal.rb:196:in `dispatch'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_controller/metal.rb:232:in `block in action'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/routing/route_set.rb:82:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/routing/route_set.rb:82:in `dispatch'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/routing/route_set.rb:50:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/journey/router.rb:71:in `block in call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/journey/router.rb:59:in `each'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/journey/router.rb:59:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/routing/route_set.rb:678:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/static.rb:64:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/static.rb:64:in `call'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.3.6/lib/apipie/static_dispatcher.rb:65:in `call'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.3.6/lib/apipie/extractor/recorder.rb:132:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/static.rb:64:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/static.rb:64:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/static.rb:64:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/static.rb:64:in `call'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/apipie-rails-0.3.6/lib/apipie/middleware/checksum_in_headers.rb:27:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/etag.rb:23:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/conditionalget.rb:25:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/head.rb:11:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/params_parser.rb:27:in `call'
 | /usr/share/foreman/lib/middleware/catch_json_parse_errors.rb:9:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/flash.rb:254:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/session/abstract/id.rb:225:in `context'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/session/abstract/id.rb:220:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/cookies.rb:560:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activerecord-4.1.5/lib/active_record/query_cache.rb:36:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activerecord-4.1.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:621:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/callbacks.rb:82:in `run_callbacks'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/remote_ip.rb:76:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/railties-4.1.5/lib/rails/rack/logger.rb:38:in `call_app'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/railties-4.1.5/lib/rails/rack/logger.rb:22:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/request_id.rb:21:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/methodoverride.rb:21:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/runtime.rb:17:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activesupport-4.1.5/lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/actionpack-4.1.5/lib/action_dispatch/middleware/static.rb:64:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/sendfile.rb:112:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/railties-4.1.5/lib/rails/engine.rb:514:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/railties-4.1.5/lib/rails/application.rb:144:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/railties-4.1.5/lib/rails/railtie.rb:194:in `public_send'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/railties-4.1.5/lib/rails/railtie.rb:194:in `method_missing'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/builder.rb:138:in `call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/urlmap.rb:65:in `block in call'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/urlmap.rb:50:in `each'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/rack-1.5.2/lib/rack/urlmap.rb:50:in `call'
 | /usr/share/passenger/phusion_passenger/rack/thread_handler_extension.rb:74:in `process_request'
 | /usr/share/passenger/phusion_passenger/request_handler/thread_handler.rb:141:in `accept_and_process_next_request'
 | /usr/share/passenger/phusion_passenger/request_handler/thread_handler.rb:109:in `main_loop'
 | /usr/share/passenger/phusion_passenger/request_handler.rb:455:in `block (3 levels) in start_threads'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/logging-1.8.2/lib/logging/diagnostic_context.rb:323:in `call'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/logging-1.8.2/lib/logging/diagnostic_context.rb:323:in `block in create_with_logging_context'
2016-07-01 13:27:45 [app] [I]   Rendered compute_resources_vms/_error.html.erb (2.0ms)
2016-07-01 13:27:45 [app] [I] Completed 200 OK in 328ms (Views: 3.7ms | ActiveRecord: 7.5ms)