POW，OS X - 代理超时 - 502 错误

Question

我运行 POW OSX 为 RoR 应用程序开发提供服务。几天前，我的一个应用程序崩溃并返回 502 错误。页面似乎正在加载，直到遇到超时显示此消息：

Proxy Error

The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request GET /index.html.

Reason: Error reading from remote server

我检查了日志，没有任何内容 - 没有执行 Ruby 代码，所以 Rails 甚至都没有被触及。我在终端输入 rails s，应用程序运行正常。

我还通过 GIT 将我的应用恢复到发布前的阶段，甚至恢复到最开始，结果是一样的。

*.dev 域中的其他开发应用程序运行正常。

不确定问题出在哪里，我应该在哪里寻找它。如果有任何帮助，我将不胜感激。

Answer 1

已解决

我必须在 ~/Library/Logs/Pow/app/ 中查看日志并发现 Ruby 错误。 http://pow.cx/manual.html#section_2.6

[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING /Users/***/.rvm/gems/ruby-2.2.2/gems/json-1.8.3/lib/json/ext.rb:13:in `require'
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING 
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING -- Machine register context ------------------------------------------------
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING  rax: 0x0000000000000000 rbx: 0x00007fdfad2f4450 rcx: 0x0000000000000000
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING  rdx: 0x0000000000000000 rdi: 0x0000000000000000 rsi: 0x0000000000000025
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING  rbp: 0x00007fff57954310 rsp: 0x00007fff579542b0  r8: 0x0000000000000000
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING   r9: 0x00007fff71bb2110 r10: 0x00007fff98b8e401 r11: 0x00007fff8f847140
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING  r12: 0x0000000108d0ece0 r13: 0x0000000000000000 r14: 0x0000000000000025
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING  r15: 0x0000000000000000 rip: 0x0000000108d58886 rfl: 0x0000000000010202
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING 
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING -- C level backtrace information -------------------------------------------
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING 0   libruby.2.2.0.dylib                 0x0000000108440655 rb_vm_bugreport + 149
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING 1   libruby.2.2.0.dylib                 0x00000001082e82f2 rb_bug_context + 466
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING 2   libruby.2.2.0.dylib                 0x00000001083bccf3 sigsegv + 83
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING 3   libsystem_platform.dylib            0x00007fff841a352a _sigtramp + 26
[Wed Feb 10 2016 01:46:33 GMT+0100 (CET)] WARNING 4   libruby.2.2.0.dylib                 0x0000000108d58886 newobj_of + 45

我已经降级 Ruby 2.2.2 -> 2.2.1 并且它可以工作。所以我敢打赌就是这样，我的问题是为什么它在运行 rails s.

时工作正常

POW，OS X - 代理超时 - 502 错误

POW, OS X - Proxy timeout - 502 error

ruby

macos

ruby-on-rails

rack-pow