Javascript 由于ExecJS，在生产服务器上运行Rake任务失败

我在RHEL 6机器上安装了Rails 4应用程序

该产品使用Passenger和Apache2

最近，我一直在尝试使用Gem和Cron将Rake任务作为计划作业集成到生产中

每当我尝试在生产环境中运行这些Rake任务中的一项时，就会出现以下错误：

rake aborted!
ExecJS::RuntimeUnavailable: Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes.

值得一提的是，机器上安装了NodeJS。我可以预编译资产，等等。 具体来说，命令

节点--version

生成：

v0.10.31

这是我的堆栈跟踪：

  rake aborted!
    ExecJS::RuntimeUnavailable: Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes.
    /var/www/eng_performance/shared/bundle/ruby/2.0.0/gems/execjs-2.2.1/lib/execjs/runtimes.rb:51:in `autodetect'
    /var/www/eng_performance/shared/bundle/ruby/2.0.0/gems/execjs-2.2.1/lib/execjs.rb:5:in `<module:ExecJS>'
    /var/www/eng_performance/shared/bundle/ruby/2.0.0/gems/execjs-2.2.1/lib/execjs.rb:4:in `<top (required)>'
    /var/www/eng_performance/shared/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `require'
    /var/www/eng_performance/shared/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `block in require'
    /var/www/eng_performance/shared/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:214:in `load_dependency'
    /var/www/eng_performance/shared/bundle/ruby/2.0.0/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:229:in `require'
    /var/www/eng_performance/shared/bundle/ruby/2.0.0/gems/uglifier-2.5.3/lib/uglifier.rb:3:in `<top (required)>'
    /home/deploy/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.7.2/lib/bundler/runtime.rb:76:in `require'
    /home/deploy/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.7.2/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
    /home/deploy/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.7.2/lib/bundler/runtime.rb:72:in `each'
    /home/deploy/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.7.2/lib/bundler/runtime.rb:72:in `block in require'
    /home/deploy/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.7.2/lib/bundler/runtime.rb:61:in `each'
    /home/deploy/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.7.2/lib/bundler/runtime.rb:61:in `require'
    /home/deploy/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.7.2/lib/bundler.rb:133:in `require'
    /var/www/eng_performance/releases/20141014084554/config/application.rb:7:in `<top (required)>'
    /var/www/eng_performance/releases/20141014084554/Rakefile:4:in `require'
    /var/www/eng_performance/releases/20141014084554/Rakefile:4:in `<top (required)>'
    (See full trace by running task with --trace)

---

嗯，最后，我终于解决了这个问题：）

事实证明，node.js的安装并没有什么问题，只是引用了node.js

我不知道最初为什么会更改，但解决了问题-即通过添加符号链接

ln-s/usr/local/bin/node/usr/bin/node

注意：我很确定符号链接不是最佳实践。如果有人能提出另一个想法，我很乐意听

希望这是我在node.js中遇到的最后一个错误。

---

如果出现类似这样的其他错误，Rubyracer将提供出色的备份解决方案

你能检查一下你的gem文件中是否没有注释

gem'therubyracer'

？@RMilushev，谢谢你的回复。据我所知，对于性能问题，不建议使用therubyracer。我发现了不止一个这样的线程：。你知道这些问题吗？这个gem的一些新版本有什么变化吗？我在生产Debian Linux服务器上使用nodejs的经验不好。它必须以一种非常特殊的方式安装，我们决定依靠

therubyracer

gem。我不认为有性能问题，因为它是一个V8 js机器整经机，没有多少。

Packages skipped because of dependency problems:
    c-ares19-1.9.1-5.el6.3.x86_64 from epel
    http-parser-2.0-4.20121128gitcd01361.el6.x86_64 from epel
    1:libuv-0.10.28-1.el6.x86_64 from epel
    nodejs-0.10.30-1.el6.x86_64 from epel
    1:v8-3.14.5.10-11.el6.x86_64 from epel