ROR problems with cassandra

I use in my project Cassandra and after update ubuntu OS I catch next problems after start my RoR project:

Web application could not be started

No live servers in [#Thrift::BinaryProtocolAccelerated, :protocol_extra_params=>[], :transport=>Thrift::Socket, :transport_wrapper=>Thrift::FramedTransport, :raise=>true, :defaults=>{}, :exception_classes=>[IOError, Thrift::Exception, Thrift::ApplicationException, Thrift::TransportException], :exception_class_overrides=>[], :retries=>2, :server_retry_period=>0, :server_max_requests=>nil, :retry_overrides=>{}, :wrapped_exception_classes=>[Thrift::ApplicationException, Thrift::TransportException], :connect_timeout=>0.1, :timeout=>3, :timeout_overrides=>{}, :cached_connections=>false, :thrift_client_class=>ThriftClient}, @cached=false, @marked_down_til=2016-03-21 12:13:12 +0200, @connection=#, @rbuf="", @wbuf="", @read=true, @write=true, @index=0>, @transport_wrapper=Thrift::FramedTransport, @server="127.0.0.1:9160", @timeout=0.1>, @client=nil>]. (ThriftClient::NoServersAvailable)
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/thrift_client-0.8.4/lib/thrift_client/abstract_thrift_client.rb:219:in no_servers_available!'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/thrift_client-0.8.4/lib/thrift_client/abstract_thrift_client.rb:105:in rescue in connect!'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/thrift_client-0.8.4/lib/thrift_client/abstract_thrift_client.rb:96:in connect!'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/thrift_client-0.8.4/lib/thrift_client/abstract_thrift_client.rb:159:in handled_proxy'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/thrift_client-0.8.4/lib/thrift_client/abstract_thrift_client.rb:53:in login'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/cassandra-0.23.0/lib/cassandra/cassandra.rb:124:in login!'
/home/tk/WorkSpaceNew/server-new/lib/cassandra_connection_provider.rb:47:in connect_to_cassandra'
/home/tk/WorkSpaceNew/server-new/lib/cassandra_connection_provider.rb:4:in connection'
/home/tk/WorkSpaceNew/server-new/config/initializers/cassandra.rb:1:in <top (required)>'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in load'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in block in load'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in load_dependency'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:222:in load'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.0/lib/rails/engine.rb:609:in block (2 levels) in '
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.0/lib/rails/engine.rb:608:in each'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.0/lib/rails/engine.rb:608:in block in '
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.0/lib/rails/initializable.rb:30:in instance_exec'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.0/lib/rails/initializable.rb:30:in run'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.0/lib/rails/initializable.rb:55:in block in run_initializers'
/home/tk/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/tsort.rb:150:in block in tsort_each'
/home/tk/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/tsort.rb:183:in block (2 levels) in each_strongly_connected_component'
/home/tk/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/tsort.rb:210:in block (2 levels) in each_strongly_connected_component_from'
/home/tk/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/tsort.rb:219:in each_strongly_connected_component_from'
/home/tk/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/tsort.rb:209:in block in each_strongly_connected_component_from'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.0/lib/rails/initializable.rb:44:in each'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.0/lib/rails/initializable.rb:44:in tsort_each_child'
/home/tk/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/tsort.rb:203:in each_strongly_connected_component_from'
/home/tk/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/tsort.rb:182:in block in each_strongly_connected_component'
/home/tk/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/tsort.rb:180:in each'
/home/tk/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/tsort.rb:180:in each_strongly_connected_component'
/home/tk/.rvm/rubies/ruby-2.0.0-p353/lib/ruby/2.0.0/tsort.rb:148:in tsort_each'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.0/lib/rails/initializable.rb:54:in run_initializers'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.0/lib/rails/application.rb:215:in initialize!'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:inmethod_missing'
/home/tk/WorkSpaceNew/server-new/config/environment.rb:8:in <top (required)>' config.ru:3:inrequire' config.ru:3:in block in <main>'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/rack-1.5.4/lib/rack/builder.rb:55:in instance_eval'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/rack-1.5.4/lib/rack/builder.rb:55:in initialize' config.ru:1:innew' config.ru:1:in <main>'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/passenger-5.0.26/src/helper-scripts/rack-preloader.rb:110:in eval'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/passenger-5.0.26/src/helper-scripts/rack-preloader.rb:110:in preload_app'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/passenger-5.0.26/src/helper-scripts/rack-preloader.rb:156:in '
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/passenger-5.0.26/src/helper-scripts/rack-preloader.rb:30:in <module:PhusionPassenger>'
/home/tk/.rvm/gems/ruby-2.0.0-p353/gems/passenger-5.0.26/src/helper-scripts/rack-preloader.rb:29:in' Error ID 5f40a8bc

I don't know why it is happens and how to fix it. Help me pls.