在我的rails 应用目录下执行”rake test", 之后就一直不动，等半天没反应，然后我按'Ctrl+C'出来一堆信息是这样的

++++++++++++++如下++++++++++++++++

ishamo@sm-pc:~/ra/sample_app$ rake test
^Crake aborted!
Interrupt:
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5/lib/active_record/migration.rb:401:in `system'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5/lib/active_record/migration.rb:401:in `block in load_schema_if_pending!'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5/lib/active_record/migration.rb:398:in `load_schema_if_pending!'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5/lib/active_record/migration.rb:411:in `block in maintain_test_schema!'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5/lib/active_record/migration.rb:642:in `suppress_messages'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5/lib/active_record/migration.rb:416:in `method_missing'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.5/lib/active_record/migration.rb:411:in `maintain_test_schema!'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/test_help.rb:19:in `<top (required)>'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in `require'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in `block in require'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:240:in `load_dependency'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:274:in `require'
/home/ishamo/ra/sample_app/test/test_helper.rb:3:in `<top (required)>'
/home/ishamo/ra/sample_app/test/controllers/static_pages_controller_test.rb:1:in `require'
/home/ishamo/ra/sample_app/test/controllers/static_pages_controller_test.rb:1:in `<top (required)>'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/test_unit/sub_test_task.rb:114:in `require'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/test_unit/sub_test_task.rb:114:in `block (3 levels) in define'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/test_unit/sub_test_task.rb:114:in `each'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/test_unit/sub_test_task.rb:114:in `block (2 levels) in define'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/test_unit/sub_test_task.rb:113:in `each'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/test_unit/sub_test_task.rb:113:in `block in define'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/test_unit/sub_test_task.rb:20:in `invoke_rake_task'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/test_unit/testing.rake:8:in `block in <top (required)>'
/home/ishamo/.rvm/gems/ruby-2.2.1/bin/ruby_executable_hooks:15:in `eval'
/home/ishamo/.rvm/gems/ruby-2.2.1/bin/ruby_executable_hooks:15:in `<main>'
/home/ishamo/.rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/client/run.rb:54:in `gets': Tasks: TOP => test:run
(See full trace by running task with --trace)
Interrupt
from /home/ishamo/.rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/client/run.rb:54:in `verify_server_version'
from /home/ishamo/.rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/client/run.rb:25:in `call'
from /home/ishamo/.rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/client/command.rb:7:in `call'
from /home/ishamo/.rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/client.rb:26:in `run'
from /home/ishamo/.rvm/gems/ruby-2.2.1/gems/spring-1.1.3/bin/spring:48:in `<top (required)>'
from /home/ishamo/.rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `load'
from /home/ishamo/.rvm/gems/ruby-2.2.1/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `<top (required)>'
from /home/ishamo/ra/sample_app/bin/spring:13:in `require'
from /home/ishamo/ra/sample_app/bin/spring:13:in `<top (required)>'
from bin/rake:3:in `load'
from bin/rake:3:in `<main>'
ishamo@sm-pc:~/ra/sample_app$

++++++++++++++++++++++++++++++++++++++++