Created attachment 1149463 [details]
evm.log for CFME 5.6

Description of problem:
During verifying https://bugzilla.redhat.com/show_bug.cgi?id=1307153 I encountered with another autodiscovery bug. vmWare vCenter cannot be added.

Version-Release number of selected component (if applicable):
5.6.0.1-beta2.20160413141124_e25ac0e

How reproducible:
Always

Steps to Reproduce:
1. Navigate to Infrastructure->Providers panel and select 'Configuration' button.
2. Select 'Discover Infrastructure Providers' from drop down box.
3. Select the checkbox for the vmWare vCenter provider.
4. Enter a from-to set of ip address which includes an address of vCenter provider.

Actual results:
Erorr "[NoMethodError]: undefined method `exist?' for #<ActiveRecord::Relation []>  Method:[rescue in discoverHost]" when vCenter ip address is discovered.

Expected results:
vCenter provider should be discovered without errors.

Additional info:
In the testing environment, ip address 10.8.58.22 is known to be a Virtual Center.  While searching thru a range that includes this value the following error is encountered:
[----] I, [2016-04-21T08:53:32.854970 #2988:10a1990]  INFO -- : MIQ(Host.discoverHost) Discovered: #<OpenStruct ipaddr="10.8.58.22", usePing=nil, timeout=10, discover_types=[:virtualcenter], os=[:mswin], hypervisor=[:virtualcenter]>
[----] E, [2016-04-21T08:53:32.899317 #2988:10a1990] ERROR -- : [NoMethodError]: undefined method `exist?' for #<ActiveRecord::Relation []>  Method:[rescue in discoverHost]
[----] E, [2016-04-21T08:53:32.899811 #2988:10a1990] ERROR -- : /opt/rh/cfme-gemset/bundler/gems/rails-efaa6e4f79d4/activerecord/lib/active_record/relation/delegation.rb:124:in `method_missing'
/opt/rh/cfme-gemset/bundler/gems/rails-efaa6e4f79d4/activerecord/lib/active_record/relation/delegation.rb:94:in `method_missing'
/var/www/miq/vmdb/app/models/ext_management_system.rb:155:in `create_discovered_ems'
/var/www/miq/vmdb/app/models/host.rb:989:in `discoverHost'
/var/www/miq/vmdb/app/models/miq_queue.rb:347:in `block in deliver'
/opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:89:in `block in timeout'
/opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:34:in `block in catch'
/opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:34:in `catch'
/opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:34:in `catch'
/opt/rh/rh-ruby22/root/usr/share/ruby/timeout.rb:104:in `timeout'
/var/www/miq/vmdb/app/models/miq_queue.rb:343:in `deliver'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:106:in `deliver_queue_message'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:134:in `deliver_message'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:152:in `block in do_work'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:146:in `loop'
/var/www/miq/vmdb/app/models/miq_queue_worker_base/runner.rb:146:in `do_work'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:334:in `block in do_work_loop'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:331:in `loop'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:331:in `do_work_loop'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:153:in `run'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:128:in `start'
/var/www/miq/vmdb/app/models/miq_worker/runner.rb:21:in `start_worker'
/var/www/miq/vmdb/app/models/miq_worker.rb:346:in `block in start'
/opt/rh/cfme-gemset/gems/nakayoshi_fork-0.0.3/lib/nakayoshi_fork.rb:24:in `fork'
/opt/rh/cfme-gemset/gems/nakayoshi_fork-0.0.3/lib/nakayoshi_fork.rb:24:in `fork'
/var/www/miq/vmdb/app/models/miq_worker.rb:344:in `start'
/var/www/miq/vmdb/app/models/miq_worker.rb:274:in `start_worker'
/var/www/miq/vmdb/app/models/miq_worker.rb:154:in `block in sync_workers'
/var/www/miq/vmdb/app/models/miq_worker.rb:154:in `times'
/var/www/miq/vmdb/app/models/miq_worker.rb:154:in `sync_workers'
/var/www/miq/vmdb/app/models/miq_server/worker_management/monitor.rb:49:in `block in sync_workers'
/var/www/miq/vmdb/app/models/miq_server/worker_management/monitor.rb:47:in `each'
/var/www/miq/vmdb/app/models/miq_server/worker_management/monitor.rb:47:in `sync_workers'
/var/www/miq/vmdb/app/models/miq_server.rb:173:in `start'
/var/www/miq/vmdb/app/models/miq_server.rb:264:in `start'
/var/www/miq/vmdb/lib/workers/evm_server.rb:65:in `start'
/var/www/miq/vmdb/lib/workers/evm_server.rb:92:in `start'
/var/www/miq/vmdb/lib/workers/bin/evm_server.rb:4:in `<main>'