Bug 1277230

Description of problem:
----------------------
The UI blows up with this error while reloading charts from the most recent C&U data.

Error Text:
Couldn't find MiqTask with 'id'=312 [vm_infra/wait_for_task] 

Snippet from production.log:
[----] I, [2015-11-02T12:54:30.144692 #2914:61998c]  INFO -- :   Rendered layouts/_exception_contents.html.haml (0.2ms)
[----] I, [2015-11-02T12:54:30.145115 #2914:61998c]  INFO -- : Completed 200 OK in 93ms (Views: 1.0ms | ActiveRecord: 37.7ms)
[----] I, [2015-11-02T12:54:30.150666 #2914:61998c]  INFO -- : Started POST "/vm_infra/wait_for_task?escape=false&task_id=311" for 127.0.0.1 at 2015-11-02 12:54:30 -0500
[----] I, [2015-11-02T12:54:30.151647 #2914:61998c]  INFO -- : Processing by VmInfraController#wait_for_task as JS
[----] I, [2015-11-02T12:54:30.151715 #2914:61998c]  INFO -- :   Parameters: {"authenticity_token"=>"7d5vCFVD6/SYOGOa2LxrahKgCChLK5uBtkGDer4TwVhG0j2wGcPZ5KS1laq9nZYgqHQ9ypTebECNOVBiQYHJbA==", "escape"=>"false", "task_id"=>"311"}
[----] F, [2015-11-02T12:54:30.198262 #2914:61998c] FATAL -- : Error caught: [ActiveRecord::RecordNotFound] Couldn't find MiqTask with 'id'=312
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activerecord/lib/active_record/core.rb:155:in `find'
/var/www/miq/vmdb/app/controllers/application_controller/performance.rb:759:in `perf_gen_data_after_wait'
/var/www/miq/vmdb/app/controllers/application_controller/performance.rb:631:in `perf_gen_data'
/var/www/miq/vmdb/app/controllers/application_controller/performance.rb:42:in `perf_chart_chooser'
/var/www/miq/vmdb/app/controllers/application_controller/explorer.rb:121:in `x_button'
/var/www/miq/vmdb/app/controllers/application_controller.rb:346:in `wait_for_task'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/actionpack/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/actionpack/lib/abstract_controller/base.rb:198:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/actionpack/lib/action_controller/metal/rendering.rb:10:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/actionpack/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activesupport/lib/active_support/callbacks.rb:117:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activesupport/lib/active_support/callbacks.rb:117:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activesupport/lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activesupport/lib/active_support/callbacks.rb:505:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activesupport/lib/active_support/callbacks.rb:505:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activesupport/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activesupport/lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activesupport/lib/active_support/callbacks.rb:81:in `run_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/actionpack/lib/abstract_controller/callbacks.rb:19:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/actionpack/lib/action_controller/metal/rescue.rb:29:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/actionpack/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activesupport/lib/active_support/notifications.rb:164:in `block in instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activesupport/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activesupport/lib/active_support/notifications.rb:164:in `instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/actionpack/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/actionpack/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/activerecord/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-e2fcb2b4aec6/actionpack/lib/abstract_controller/base.rb:137:in `process'


Version-Release number of selected component (if applicable):
-------------------------------------
5.5.0.8


How reproducible:
----------------
Always


Steps to Reproduce:
------------------
1.Manage a provider.Enable C&U collection for the provider.
2.Navigate to the summary page of a VM.Click 'Monitoring',click 'Utilization'
3.Once the C&U charts are loaded(daily,hourly or most recent hour),hit the 
'Reload the charts from the most recent C&U data'.


Actual results:
---------------


Expected results:
-----------------


Additional info:
----------------