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这是我昨天发布的问题的后续问题，似乎是在得到了一些试图帮助的人的回应后，在半空中“悬挂”。后续：rails3和杂种问题 - 红宝石1.9.2
无论如何，这次和以前的尝试唯一的区别是我使用RVM来安装使用Ruby 1.9.2。该杂种是1.2.0.pre版本，因为mongrel 1.1.5不会与Ruby 1.9.2一起安装。
我的Gemfile如下：
source 'http://rubygems.org'
gem 'rails', '3.0.8'
gem 'pg'
gem 'mongrel', '>= 1.2.0.pre2'
gem "cgi_multipart_eof_fix"
gem "fastthread"
而且
错误日志，如下图所示，当我运行 “mongrel_rails集群::开始”：
** Daemonized, any open files are closed. Look at tmp/pids/mongrel.3000.pid and
log/mongrel.3000.log for info.
** Starting Mongrel listening at 127.0.0.1:3000
** Starting Rails with development environment...
** Mounting Rails at /home/ec2-user/test_ruby_1.9.2...
/home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.8/lib/active_sup
port/dependencies.rb:239:in `require': no such file to load -- dispatcher (LoadE
rror)
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.8/l
ib/active_support/dependencies.rb:239:in `block in require'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.8/l
ib/active_support/dependencies.rb:225:in `block in load_dependency'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.8/l
ib/active_support/dependencies.rb:596:in `new_constants_in'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.8/l
ib/active_support/dependencies.rb:225:in `load_dependency'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/activesupport-3.0.8/l
ib/active_support/dependencies.rb:239:in `require'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/mongrel-1.2.0.pre2/li
b/mongrel/rails.rb:148:in `rails'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/mongrel-1.2.0.pre2/bi
n/mongrel_rails:116:in `block (2 levels) in run'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/mongrel-1.2.0.pre2/li
b/mongrel/configurator.rb:149:in `call'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/mongrel-1.2.0.pre2/li
b/mongrel/configurator.rb:149:in `listener'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/mongrel-1.2.0.pre2/bi
n/mongrel_rails:102:in `block in run'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/mongrel-1.2.0.pre2/li
b/mongrel/configurator.rb:50:in `call'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/mongrel-1.2.0.pre2/li
b/mongrel/configurator.rb:50:in `initialize'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/mongrel-1.2.0.pre2/bi
n/mongrel_rails:86:in `new'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/mongrel-1.2.0.pre2/bi
n/mongrel_rails:86:in `run'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/mongrel-1.2.0.pre2/li
b/mongrel/command.rb:210:in `run'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/gems/mongrel-1.2.0.pre2/bi
n/mongrel_rails:282:in `<top (required)>'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/bin/mongrel_rails:19:in `l
oad'
from /home/ec2-user/.rvm/gems/ruby-1.9.2-p180/bin/mongrel_rails:19:in `<
main>'
请帮助。 TIA。