Ruby 2.2 support in #11016 is incomplete, it still has test failures:

On PostgreSQL it's failing to initialise the pg gem:

08:28:36 + bundle exec rake db:drop db:create db:migrate
08:28:47 Couldn't drop test_develop_pr_core_ruby22-1-dev : #<LoadError: Please install the postgresql adapter: `gem install activerecord-postgresql-adapter` (incompatible library version - /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/pg-0.18.3/lib/pg_ext.so)>
08:28:47 Couldn't drop test_develop_pr_core_ruby22-1-test : #<LoadError: Please install the postgresql adapter: `gem install activerecord-postgresql-adapter` (incompatible library version - /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/pg-0.18.3/lib/pg_ext.so)>
08:28:47 rake aborted!
08:28:47 LoadError: Please install the postgresql adapter: `gem install activerecord-postgresql-adapter` (incompatible library version - /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/pg-0.18.3/lib/pg_ext.so)
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `block in require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:236:in `load_dependency'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/pg-0.18.3/lib/pg.rb:4:in `<top (required)>'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `block in require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:236:in `load_dependency'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/connection_adapters/postgresql_adapter.rb:8:in `<top (required)>'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `block in require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:236:in `load_dependency'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract/connection_specification.rb:50:in `resolve_hash_connection'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract/connection_specification.rb:29:in `spec'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract/connection_specification.rb:130:in `establish_connection'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/railties/databases.rake:101:in `create_database'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/railties/databases.rake:62:in `block (3 levels) in <top (required)>'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/railties/databases.rake:62:in `each'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/railties/databases.rake:62:in `block (2 levels) in <top (required)>'
08:28:47 LoadError: incompatible library version - /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/pg-0.18.3/lib/pg_ext.so
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `block in require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:236:in `load_dependency'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/pg-0.18.3/lib/pg.rb:4:in `<top (required)>'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `block in require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:236:in `load_dependency'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/connection_adapters/postgresql_adapter.rb:8:in `<top (required)>'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `block in require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:236:in `load_dependency'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activesupport-3.2.22/lib/active_support/dependencies.rb:251:in `require'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract/connection_specification.rb:50:in `resolve_hash_connection'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract/connection_specification.rb:29:in `spec'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/connection_adapters/abstract/connection_specification.rb:130:in `establish_connection'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/railties/databases.rake:101:in `create_database'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/railties/databases.rake:62:in `block (3 levels) in <top (required)>'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/railties/databases.rake:62:in `each'
08:28:47 /usr/local/rvm/gems/ruby-2.2.3@test_develop_pr_core_ruby22-1/gems/activerecord-3.2.22/lib/active_record/railties/databases.rake:62:in `block (2 levels) in <top (required)>'
08:28:47 Tasks: TOP => db:create
08:28:47 (See full trace by running task with --trace)

(http://ci.theforeman.org/job/test_develop_pr_core_ruby22/7/database=postgresql,ruby=2.2/console)

On sqlite3 and mysql, it actually runs the test suite and fails with:

08:29:55 ===============================================================================
08:29:55 Failure:
08:29:55   <"localhost"> expected but was
08:29:55   <"foreman.some.host.fqdn">.
08:29:55 test_0001_foreman server header is set(ApplicationMailerTest)
08:29:55 test/unit/application_mailer_test.rb:14:in `block in <class:ApplicationMailerTest>'
08:29:55 ===============================================================================

08:30:23 ===============================================================================
08:30:23 Error: test_0014_add compute resource(ComputeResourceTest): NameError: uninitialized class variable @@current in MiniTest::Unit::TestCase
08:30:23 test/unit/compute_resource_test.rb:109:in `block in <class:ComputeResourceTest>'
08:30:23 ===============================================================================

08:33:33 ===============================================================================
08:33:33 Error: test_0001_be tested(MenuItemTest::MenuItem#caption): NoMethodError: undefined method `skip' for #<#<Class:0x0000000c8fccb0>:0x0000000ad272d8>
08:35:30 ===============================================================================
08:37:17 E
08:37:17 ===============================================================================

(http://ci.theforeman.org/job/test_develop_pr_core_ruby22/7/database=sqlite3,ruby=2.2/console, http://ci.theforeman.org/job/test_develop_pr_core_ruby22/7/database=mysql,ruby=2.2/console)

The mysql test failed with a SIGKILL due to the OOM killer, this may require some consideration given to our Jenkins infrastructure. The RSS of the Ruby process was reported to be 2.54GB.