Configured "nott04" TLV RHEV instance CR, clicked on Instances and Associate host. After some time, got this error:

undefined method `[]' for nil:NilClass
Rails.root: /home/lzap/work/foreman

Application Trace | Framework Trace | Full Trace
app/models/compute_resources/foreman/model/ovirt.rb:192:in `associated_host'
app/controllers/compute_resources_controller.rb:43:in `block in associate'
app/controllers/compute_resources_controller.rb:41:in `associate'
app/models/concerns/foreman/thread_session.rb:33:in `clear_thread'
lib/middleware/catch_json_parse_errors.rb:9:in `call'

Full trace:

rbovirt (0.0.21) lib/ovirt/interface.rb:39:in `parse_xml_attributes!'
rbovirt (0.0.21) lib/ovirt/interface.rb:13:in `initialize'
rbovirt (0.0.21) lib/client/vm_api.rb:41:in `new'
rbovirt (0.0.21) lib/client/vm_api.rb:41:in `block in vm_interfaces'
nokogiri (1.6.1) lib/nokogiri/xml/node_set.rb:237:in `block in each'
nokogiri (1.6.1) lib/nokogiri/xml/node_set.rb:236:in `upto'
nokogiri (1.6.1) lib/nokogiri/xml/node_set.rb:236:in `each'
rbovirt (0.0.21) lib/client/vm_api.rb:40:in `collect'
rbovirt (0.0.21) lib/client/vm_api.rb:40:in `vm_interfaces'
fog (1.19.0) lib/fog/ovirt/requests/compute/list_vm_interfaces.rb:6:in `list_vm_interfaces'
fog (1.19.0) lib/fog/ovirt/models/compute/interfaces.rb:17:in `all'
fog (1.19.0) lib/fog/core/collection.rb:141:in `lazy_load'
fog (1.19.0) lib/fog/core/collection.rb:22:in `empty?'
fog (1.19.0) lib/fog/ovirt/models/compute/server.rb:45:in `mac'
app/models/compute_resources/foreman/model/ovirt.rb:192:in `associated_host'
app/controllers/compute_resources_controller.rb:43:in `block in associate'
fog (1.19.0) lib/fog/core/collection.rb:24:in `each'
fog (1.19.0) lib/fog/core/collection.rb:24:in `each'
app/controllers/compute_resources_controller.rb:41:in `associate'
actionpack (3.2.16) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (3.2.16) lib/abstract_controller/base.rb:167:in `process_action'
actionpack (3.2.16) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (3.2.16) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
activesupport (3.2.16) lib/active_support/callbacks.rb:538:in `block (3 levels) in _run__3912459823542471392__process_action__1153861267127841747__callbacks'
activesupport (3.2.16) lib/active_support/callbacks.rb:215:in `block in _conditional_callback_around_4253'
activesupport (3.2.16) lib/active_support/callbacks.rb:326:in `around'
activesupport (3.2.16) lib/active_support/callbacks.rb:310:in `_callback_around_1251'
activesupport (3.2.16) lib/active_support/callbacks.rb:214:in `_conditional_callback_around_4253'
activesupport (3.2.16) lib/active_support/callbacks.rb:526:in `block (2 levels) in _run__3912459823542471392__process_action__1153861267127841747__callbacks'
activesupport (3.2.16) lib/active_support/callbacks.rb:215:in `block in _conditional_callback_around_4252'
app/models/concerns/foreman/thread_session.rb:33:in `clear_thread'
activesupport (3.2.16) lib/active_support/callbacks.rb:214:in `_conditional_callback_around_4252'
activesupport (3.2.16) lib/active_support/callbacks.rb:415:in `block in _run__3912459823542471392__process_action__1153861267127841747__callbacks'
activesupport (3.2.16) lib/active_support/callbacks.rb:215:in `block in _conditional_callback_around_4251'
activesupport (3.2.16) lib/active_support/callbacks.rb:326:in `around'
activesupport (3.2.16) lib/active_support/callbacks.rb:310:in `_callback_around_13'
activesupport (3.2.16) lib/active_support/callbacks.rb:214:in `_conditional_callback_around_4251'
activesupport (3.2.16) lib/active_support/callbacks.rb:414:in `_run__3912459823542471392__process_action__1153861267127841747__callbacks'
activesupport (3.2.16) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.16) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
activesupport (3.2.16) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.16) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.2.16) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (3.2.16) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
activesupport (3.2.16) lib/active_support/notifications.rb:123:in `block in instrument'
activesupport (3.2.16) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.16) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.16) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.2.16) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
activerecord (3.2.16) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (3.2.16) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.2.16) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.2.16) lib/action_controller/metal.rb:203:in `dispatch'
actionpack (3.2.16) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
actionpack (3.2.16) lib/action_controller/metal.rb:246:in `block in action'
actionpack (3.2.16) lib/action_dispatch/routing/route_set.rb:73:in `call'
actionpack (3.2.16) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
actionpack (3.2.16) lib/action_dispatch/routing/route_set.rb:36:in `call'
journey (1.0.4) lib/journey/router.rb:68:in `block in call'
journey (1.0.4) lib/journey/router.rb:56:in `each'
journey (1.0.4) lib/journey/router.rb:56:in `call'
actionpack (3.2.16) lib/action_dispatch/routing/route_set.rb:608:in `call'
apipie-rails (0.0.24) lib/apipie/static_dispatcher.rb:65:in `call'
rack-openid (1.4.1) lib/rack/openid.rb:99:in `call'
actionpack (3.2.16) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
rack (1.4.5) lib/rack/etag.rb:23:in `call'
rack (1.4.5) lib/rack/conditionalget.rb:35:in `call'
actionpack (3.2.16) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.2.16) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
lib/middleware/catch_json_parse_errors.rb:9:in `call'
actionpack (3.2.16) lib/action_dispatch/middleware/flash.rb:242:in `call'
rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context'
...