我有一个使用vagrant和chef创建的虚拟机。昨晚在虚拟机运行时，我的电脑意外重启了。之后，当我尝试启动虚拟机时，我收到以下消息：
Chef从未成功完成！任何错误都应该在上面的输出中可见。请修复您的食谱，使其正确完成。[default] VM already created. Booting if it's not already running...
[default] Clearing any previously set forwarded ports...
[default] Forwarding ports...
[default] -- 22 => 2222 (adapter 1)
[default] Creating shared folders metadata...
[default] Clearing any previously set network interfaces...
[default] Preparing network interfaces based on configuration...
[default] Running any VM customizations...
[default] Booting VM...
[default] Waiting for VM to boot. This can take a few minutes.
[default] VM booted and ready for use!
[default] Configuring and enabling network interfaces...
[default] Mounting shared folders...
[default] -- v-root: /vagrant
[default] -- v-data: /vagrant
[default] -- v-csr-2: /tmp/vagrant-chef-1/chef-solo-2/roles
[default] -- v-csc-1: /tmp/vagrant-chef-1/chef-solo-1/cookbooks
[default] Running provisioner: Vagrant::Provisioners::ChefSolo...
[default] Generating chef JSON and uploading...
[default] Running chef-solo...
stdin: is not a tty
[Tue, 10 Jul 2012 00:59:36 -0700] INFO: *** Chef 0.10.2 ***
[Tue, 10 Jul 2012 00:59:36 -0700] INFO: Setting the run_list to ["role[my-site]"] from JSON
[Tue, 10 Jul 2012 00:59:36 -0700] INFO: Run List is [role[my-site]]
[Tue, 10 Jul 2012 00:59:36 -0700] INFO: Run List expands to [memcached, my-site, my-site::vm]
[Tue, 10 Jul 2012 00:59:36 -0700] INFO: Starting Chef Run for lucid32
[Tue, 10 Jul 2012 00:59:37 -0700] ERROR: Running exception handlers
[Tue, 10 Jul 2012 00:59:37 -0700] ERROR: Exception handlers complete
[Tue, 10 Jul 2012 00:59:37 -0700] FATAL: Stacktrace dumped to /tmp/vagrant-chef-1/chef-stacktrace.out
[Tue, 10 Jul 2012 00:59:37 -0700] FATAL: NoMethodError: undefined method `[]' for nil:NilClass
Chef never successfully completed! Any errors should be visible in the
output above. Please fix your recipes so that they properly complete.
后续编辑：
堆栈跟踪转储到/tmp/vagrant-chef-1/chef-stacktrace.out
Generated at Tue Jul 10 00:59:37 -0700 2012
NoMethodError: undefined method `[]' for nil:NilClass
/tmp/vagrant-chef-1/chef-solo-1/cookbooks/my-site/recipes/default.rb:114:in `from_file'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/mixin/recipe_definition_dsl_core.rb:69:in `instance_eval'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/mixin/recipe_definition_dsl_core.rb:69:in `method_missing'
/tmp/vagrant-chef-1/chef-solo-1/cookbooks/my-site/recipes/default.rb:109:in `from_file'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/cookbook_version.rb:578:in `load_recipe'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/mixin/language_include_recipe.rb:40:in `include_recipe'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/mixin/language_include_recipe.rb:27:in `each'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/mixin/language_include_recipe.rb:27:in `include_recipe'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/run_context.rb:72:in `load'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/run_context.rb:69:in `each'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/run_context.rb:69:in `load'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/client.rb:195:in `setup_run_context'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/client.rb:159:in `run'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/application/solo.rb:192:in `run_application'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/application/solo.rb:183:in `loop'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/application/solo.rb:183:in `run_application'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/../lib/chef/application.rb:66:in `run'
/opt/ruby/lib/ruby/gems/1.8/gems/chef-0.10.2/bin/chef-solo:25
/opt/ruby/bin/chef-solo:19:in `load'
/opt/ruby/bin/chef-solo:19
任何想法，谢谢，Radu
my-site/recipes/default.rb的第114行，您可能正在访问一些不存在的节点属性。请查看该行代码，您是否认识那个空对象，并且能否使其不为空？ - Nils Landt