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红宝石进程占用100%的CPU

ruby-on-railsrubycpumongrel
3

当我尝试从我的应用程序（使用Devise）注销时，Rails应用程序会挂起并且Ruby会吃掉100％的CPU，在重新启动服务器后仍然无法加载页面。只有在删除和重新创建数据库后才能解决。我正在使用PostgreSQL，尝试切换到MySQL，但没有帮助。使用Mongrel（使用Webrick也会发生这种情况）。 Ruby 1.9.2，Rails 3.0.9。

strace

futex(0xe1be68, FUTEX_WAKE_PRIVATE, 1)  = 1
futex(0xe1c3fc, FUTEX_WAIT_PRIVATE, 1, NULL) = ? ERESTARTSYS (To be restarted)
--- SIGINT (Interrupt) @ 0 (0) ---
rt_sigreturn(0x2)                       = -1 EINTR (Interrupted system call)
futex(0xe1c3fc, FUTEX_WAIT_PRIVATE, 1, NULL) = 0
futex(0xe1c458, FUTEX_WAKE_PRIVATE, 1)  = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN (Resource temporarily unavailable)
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0
futex(0xe1be68, FUTEX_WAIT_PRIVATE, 2, NULL) = 0

控制台输出：

Started GET "/signout" for 127.0.0.1 at 2011-11-09 10:11:13 +0200
  SQL (1.0ms)   SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull
 FROM pg_attribute a LEFT JOIN pg_attrdef d
 ON a.attrelid = d.adrelid AND a.attnum = d.adnum
 WHERE a.attrelid = '"jokes"'::regclass
 AND a.attnum > 0 AND NOT a.attisdropped
 ORDER BY a.attnum
  Processing by SessionsController#destroy as HTML
Redirected to http://localhost:3000/
Completed 302 Found in 1ms

我不确定那里到底发生了什么？

更新* 这种冻结情况不仅发生在注销时，也会随机发生 :( 在Mac上的其他开发人员没有这个问题，我正在运行Ubuntu 11.10，尝试过10.04，但仍然存在此问题。

2
100% CPU听起来像是某种无限循环，有无数可能的罪魁祸首导致这种情况。在after_save钩子中保存模型是其中之一，无限重定向是另一个。这可能是其中之一，但也完全可能是其他原因（甚至不一定是无限循环）。 - Frost
我检查了两次，在钩子上没有无限循环。 - Petya petrov
1
你能展示一下用户模型的代码吗？你给我们的东西还不足以让我们开始定位错误来自哪里。 - Taryn East
请查看更新，我认为这与Linux有关。 - Petya petrov
Ruby 吃满 100% 只可能意味着一件事：你的服务器是单核的 :-) - Oleg Mikheev
1个回答
0

尝试在development.rb中开启cache_classes

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