我尝试使用Capistrano部署我的Padrino应用程序，但是当我运行命令：cap deploy时，会生成以下输出：
//... Other tasks executed properly
* 2016-11-05 16:23:26 executing `assets:prepare'
* executing "cd /data/apps/myapp/current; RACK_ENV=production bundle exec padrino rake assets:prepare"
servers: ["my_server_DNS_name"]
[my_server_DNS_name] executing command
** [out :: my_server_DNS_name] => Executing Rake assets:prepare ...
** [out :: my_server_DNS_name] RSpec is not part of this bundle, skip specs.
** [out :: my_server_DNS_name] W, [2016-11-05T20:23:28.664995 #14317] WARN -- : Error creating log directory log/, using standard out for logging.
** [out :: my_server_DNS_name] [11/05/16 20:23:28 +0000 ip-172-31-16-177 (14317)] INFO : Starting the New Relic agent in "production" environment.
** [out :: my_server_DNS_name] [11/05/16 20:23:28 +0000 ip-172-31-16-177 (14317)] INFO : To prevent agent startup add a NEWRELIC_ENABLE=false environment variable or modify the "production" section of your newrelic.yml.
** [out :: my_server_DNS_name] [11/05/16 20:23:28 +0000 ip-172-31-16-177 (14317)] INFO : Reading configuration from config/newrelic.yml
** [out :: my_server_DNS_name] [11/05/16 20:23:28 +0000 ip-172-31-16-177 (14317)] INFO : Enabling the Request Sampler.
** [out :: my_server_DNS_name] [11/05/16 20:23:28 +0000 ip-172-31-16-177 (14317)] INFO : Environment: production
** [out :: my_server_DNS_name] [11/05/16 20:23:28 +0000 ip-172-31-16-177 (14317)] INFO : No known dispatcher detected.
** [out :: my_server_DNS_name] [11/05/16 20:23:28 +0000 ip-172-31-16-177 (14317)] INFO : Application: myapp (Production)
** [out :: my_server_DNS_name] [11/05/16 20:23:28 +0000 ip-172-31-16-177 (14317)] WARN : Audit log disabled, failed opening log at '/data/apps/myapp/releases/20161105202309/log/newrelic_audit.log': File exists @ dir_s_mkdir - /data/apps/myapp/releases/20161105202309/log
** [out :: my_server_DNS_name] [11/05/16 20:23:28 +0000 ip-172-31-16-177 (14317)] INFO : Installing Net instrumentation
** [out :: my_server_DNS_name] [11/05/16 20:23:28 +0000 ip-172-31-16-177 (14317)] INFO : Installing deferred Rack instrumentation
** [out :: my_server_DNS_name] [11/05/16 20:23:28 +0000 ip-172-31-16-177 (14317)] INFO : Finished instrumentation
** [out :: my_server_DNS_name] [11/05/16 20:23:29 +0000 ip-172-31-16-177 (14317)] INFO : Reporting to: https://rpm.newrelic.com/accounts/626868/applications/2669966
** [out :: my_server_DNS_name] bundler: failed to load command: padrino (/data/apps/myapp/shared/bundle/ruby/2.1.0/bin/padrino)
** [out :: my_server_DNS_name] [11/05/16 20:23:29 +0000 ip-172-31-16-177 (14317)] INFO : Starting Agent shutdown
*** [err :: my_server_DNS_name] Errno::EEXIST: File exists @ dir_s_mkdir - /data/apps/myapp/releases/20161105202309/log
*** [err :: my_server_DNS_name] /home/deploy/.rvm/rubies/ruby-2.1.8/lib/ruby/2.1.0/fileutils.rb:250:in `mkdir'
*** [err :: my_server_DNS_name] /home/deploy/.rvm/rubies/ruby-2.1.8/lib/ruby/2.1.0/fileutils.rb:250:in `fu_mkdir'
*** [err :: my_server_DNS_name] /home/deploy/.rvm/rubies/ruby-2.1.8/lib/ruby/2.1.0/fileutils.rb:224:in `block (2 levels) in mkdir_p'
*** [err :: my_server_DNS_name] /home/deploy/.rvm/rubies/ruby-2.1.8/lib/ruby/2.1.0/fileutils.rb:222:in `reverse_each'
*** [err :: my_server_DNS_name] /home/deploy/.rvm/rubies/ruby-2.1.8/lib/ruby/2.1.0/fileutils.rb:222:in `block in mkdir_p'
*** [err :: my_server_DNS_name] /home/deploy/.rvm/rubies/ruby-2.1.8/lib/ruby/2.1.0/fileutils.rb:208:in `each'
*** [err :: my_server_DNS_name] /home/deploy/.rvm/rubies/ruby-2.1.8/lib/ruby/2.1.0/fileutils.rb:208:in `mkdir_p'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/padrino-core-0.12.0/lib/padrino-core/logger.rb:283:in `setup!'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/padrino-core-0.12.0/lib/padrino-core/loader.rb:56:in `load!'
*** [err :: my_server_DNS_name] /data/apps/myapp/releases/20161105202309/config/boot.rb:52:in `<top (required)>'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/padrino-core-0.12.0/lib/padrino-core/cli/rake_tasks.rb:12:in `require'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/padrino-core-0.12.0/lib/padrino-core/cli/rake_tasks.rb:12:in `block in <top (required)>'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in `call'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in `block in execute'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in `each'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in `execute'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:175:in `block in invoke_with_call_chain'
*** [err :: my_server_DNS_name] /home/deploy/.rvm/rubies/ruby-2.1.8/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:168:in `invoke_with_call_chain'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:197:in `block in invoke_prerequisites'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:195:in `each'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:195:in `invoke_prerequisites'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:174:in `block in invoke_with_call_chain'
*** [err :: my_server_DNS_name] /home/deploy/.rvm/rubies/ruby-2.1.8/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:168:in `invoke_with_call_chain'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:161:in `invoke'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:149:in `invoke_task'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in `block (2 levels) in top_level'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in `each'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in `block in top_level'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:115:in `run_with_threads'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:100:in `top_level'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/padrino-core-0.12.0/lib/padrino-core/cli/base.rb:62:in `rake'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/thor-0.17.0/lib/thor/task.rb:27:in `run'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/thor-0.17.0/lib/thor/invocation.rb:120:in `invoke_task'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/thor-0.17.0/lib/thor.rb:344:in `dispatch'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/thor-0.17.0/lib/thor/base.rb:434:in `start'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/gems/padrino-core-0.12.0/bin/padrino:9:in `<top (required)>'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/bin/padrino:23:in `load'
*** [err :: my_server_DNS_name] /data/apps/myapp/shared/bundle/ruby/2.1.0/bin/padrino:23:in `<top (required)>'
command finished in 3322ms
failed: "env RACK_ENV=production rvm_path=$HOME/.rvm /home/deploy/.rvm/bin/rvm-shell '2.1' -c 'cd /data/apps/myapp/current; RACK_ENV=production bundle exec padrino rake assets:prepare'" on my_server_DNS_name
我不明白的主要原因是为什么padrino命令无法加载，因为我能够在路径中看到该文件：/data/apps/myapp/shared/bundle/ruby/2.1.0/bin/padrino。我该如何调试此问题？
它是否与WARN -- : Error creating log directory log/, using standard out for logging.问题有关（我不认为它可能是相关的但是......）
我花了一些时间用谷歌搜索但没有运气。