Ruby / Rails + Resque拋出“連接超時”錯誤

Question

我有一個使用Resque的Ruby Rails應用程序。

Resuqe守護程序在運行了一段時間后由於錯誤而崩潰。 我的第一個猜測是，守護程序訪問頻率不足（幾個小時），因此我每5分鍾觸發一次訪問數據庫的隊列項。 但是我仍然得到：

rake aborted!
Connection timed out
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis/client.rb:204:in `rescue in io'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis/client.rb:202:in `io'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis/client.rb:210:in `read'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis/client.rb:84:in `block in call'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis/client.rb:183:in `block (2 levels) in process'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis/client.rb:287:in `ensure_connected'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis/client.rb:173:in `block in process'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis/client.rb:248:in `logging'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis/client.rb:172:in `process'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis/client.rb:84:in `call'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis.rb:715:in `block in get'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis.rb:36:in `block in synchronize'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis.rb:36:in `synchronize'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-3.0.2/lib/redis.rb:714:in `get'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/redis-namespace-1.2.1/lib/redis/namespace.rb:257:in `method_missing'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/resque-1.23.0/lib/resque/worker.rb:517:in `job'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/resque-1.23.0/lib/resque/worker.rb:450:in `unregister_worker'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/resque-1.23.0/lib/resque/worker.rb:169:in `rescue in work'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/resque-1.23.0/lib/resque/worker.rb:129:in `work'
/usr/local/rvm/gems/ruby-1.9.3-p194/gems/resque-1.23.0/lib/resque/tasks.rb:36:in `block (2 levels) in <top (required)>'
/usr/local/rvm/gems/ruby-1.9.3-p194/bin/ruby_noexec_wrapper:14:in `eval'
/usr/local/rvm/gems/ruby-1.9.3-p194/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => resque:work
(See full trace by running task with --trace)

我將一些日志文件輸出放在我的方法中，該方法在觸發任何異步任務時會被調用，但是看起來好像連接超時是在不執行任何應用程序代碼時發生的。

然后去哪兒？

Answer 1

根據此處的日志，與redis的連接已丟失，而不是mysql。