Rails on Nginx + Phusion Passenger：“看起来 Bundler 找不到 gem。也许你没有安装这个应用程序需要的所有 gem。”

Question

我有一个使用 Nginx 和 Phusion Passenger 运行的 Rails 应用程序。几个月以来一切正常，但在上次部署后，我收到一个错误“我们很抱歉，但出了点问题。”。

Nginx 日志告诉我们：

[ 2016-05-11 13:28:26.5617 17187/7ff504072700 App/Implementation.cpp:303 ]: Could not spawn process for application /home/a4aa2/rails/current: An error occured while starting up the preloader.
  Error ID: 4153f320
  Error details saved to: /tmp/passenger-error-VPT6E4.html
  Message from application: <p>It looks like Bundler could not find a gem. Maybe you didn't install all the gems that this application needs. To install your gems, please run:</p>

  <pre class="commands">bundle install</pre>

<p>If that didn't work, then the problem is probably caused by your application being run under a different environment than it's supposed to. Please check the following:</p>

<ol>
  <li>Is this app supposed to be run as the <code>a4aa2</code> user?</li>
  <li>Is this app being run on the correct Ruby interpreter? Below you will
      see which Ruby interpreter Phusion Passenger attempted to use.</li>
</ol>

<p>-------- The exception is as follows: -------</p>
Could not find mime-types-2.99.1 in any of the sources (Bundler::GemNotFound)
...etc...

我的宝石似乎全部可用：

[a4aa2@bellatrix ~]$ cd rails/current/
[a4aa2@bellatrix current]$ bundle
Using rake 10.5.0
Using i18n 0.7.0
Using json 1.8.3
...etc...
Bundle complete! 91 Gemfile dependencies, 113 gems now installed.
Gems in the groups development and test were not installed.
Bundled gems are installed into ./vendor/bundle.

我不知道如何调试它。我唯一能想到的就是重新安装 phusion Passenger 并重试。

我正在使用托管服务。是否有可能有另一个 Nginx 进程/安装正在运行，而之前没有运行，现在这两者之间的事情搞砸了？

Answer 1

尝试捆绑更新：

bundle update