使用 RAILS_ENV="production" bundle exec rails c 时无法分配内存 (NoMemoryError)

Question

我们刚刚将 Rails 应用程序升级到4.2 到 5.2 ，一切都像开发中的魅力一样工作，但是当我们尝试在生产服务器上发布应用程序时，我们无法运行任何与 rails 相关的命令（资产预编译、迁移、控制台、等等。）。

这是跟踪：

Traceback (most recent call last):
    15: from bin/rails:4:in `<main>'
    14: from bin/rails:4:in `require'
    13: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/commands.rb:18:in `<top (required)>'
    12: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/command.rb:46:in `invoke'
    11: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/command/base.rb:65:in `perform'
    10: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/thor-0.20.3/lib/thor.rb:387:in `dispatch'
     9: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/thor-0.20.3/lib/thor/invocation.rb:126:in `invoke_command'
     8: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/thor-0.20.3/lib/thor/command.rb:27:in `run'
     7: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/commands/console/console_command.rb:95:in `perform'
     6: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/command/actions.rb:15:in `require_application_and_environment!'
     5: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/command/actions.rb:28:in `require_environment!'
     4: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/railties-5.2.3/lib/rails/application.rb:337:in `require_environment!'
     3: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:292:in `require'
     2: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:257:in `load_dependency'
     1: from /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `block in require'
     /var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:291:in `require': failed to allocate memory (NoMemoryError)

我们添加了puts file; 就在 dependencies.rb:291 中的result = super之前，并且一个puts 'ERROR!' 在dependencies.rb#L260中的救援中，这里是最后加载的文件：

active_support/per_thread_registry
rack/runtime
rack/utils
active_support/cache/strategy/local_cache_middleware
rack/body_proxy
rack/utils
tzinfo/data
ERROR!
active_support/core_ext/time/zones
ERROR!
Traceback (most recent call last):

更多信息：

• 服务器上有52G的内存，我们已经尝试添加10G的SWAP。
• 运行htop不会造成任何内存泄漏

编辑：

我们试图消除raise 在dependencies.rb＃L261当然控制台的负载，这里的日志：

rack/body_proxy
rack/utils
tzinfo/data
ERROR!
active_support/core_ext/time/zones
tzinfo/data/definitions/America/New_York
ERROR!
/var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/tzinfo-1.2.5/lib/tzinfo/ruby_data_source.rb:35: warning: constant ::Data is deprecated
/var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/dependencies.rb:396: warning: constant ::Data is deprecated
/var/deploy/slaask_kb/web_head/shared/bundle/ruby/2.6.0/gems/activesupport-5.2.3/lib/active_support/inflector/methods.rb:283: warning: constant ::Data is deprecated
ERROR!
rails/console/app
active_support/all
action_controller
rails/console/helpers
active_record/base
pp
Loading production environment (Rails 5.2.3)
e2mmap
ERROR!
irb(main):001:0> 

Answer 1

我也能够在开发环境（Linux 的 Windows 子系统）上重现该问题。

我们最终设法通过将tzinfo从1.1升级到1.2.5来解决它，如下所示： https : //github.com/tzinfo/tzinfo/issues/30