延迟作业在服务器上的生产中失败

Question

所有我的延迟作业在服务器上的生产中无缘无故失败。我尝试重新启动，删除所有以前的作业并再次启动作业工作者，但没有任何效果。

怀疑这一定是 capistrano 问题，我通过服务器上的 ssh 手动运行 rake jobs:work 但我得到了同样的错误：

ubuntu@ip-172-31-35-0:~/apps/instano-api/current$ rake jobs:work
[Worker(host:ip-172-31-35-0 pid:22174)] Starting job worker
[Worker(host:ip-172-31-35-0 pid:22174)] Job InstanoMailer.new_quote (id=73) RUNNING
[Worker(host:ip-172-31-35-0 pid:22174)] Job InstanoMailer.new_quote (id=73) FAILED (3 prior attempts) with NameError: undefined method `error' for class `Class'

我使用ExceptionNotifier gem，从中我得到了以下堆栈跟踪（但没有一行来自我的应用程序代码）：

A NameError occurred in background at 2014-12-17 02:43:21 +0530 :

  undefined method `error' for class `Class'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/performable_method.rb:7:in `method'

  -------------------------------
Backtrace:
-------------------------------

  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/performable_method.rb:7:in `method'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/performable_method.rb:7:in `method'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/backend/base.rb:113:in `hook'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/backend/base.rb:97:in `rescue in block in invoke_job'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/backend/base.rb:101:in `block in invoke_job'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:61:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:61:in `block in initialize'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:66:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:66:in `execute'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:40:in `run_callbacks'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/backend/base.rb:91:in `invoke_job'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:199:in `block (2 levels) in run'
  /home/ubuntu/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/timeout.rb:82:in `block in timeout'
  /home/ubuntu/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/timeout.rb:70:in `catch'
  /home/ubuntu/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/timeout.rb:70:in `timeout'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:199:in `block in run'
  /home/ubuntu/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/benchmark.rb:294:in `realtime'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:198:in `run'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:275:in `block in reserve_and_run_one_job'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:61:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:61:in `block in initialize'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:66:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:66:in `execute'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:40:in `run_callbacks'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:275:in `reserve_and_run_one_job'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:182:in `block in work_off'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:181:in `times'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:181:in `work_off'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:146:in `block (4 levels) in start'
  /home/ubuntu/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/benchmark.rb:294:in `realtime'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:145:in `block (3 levels) in start'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:61:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:61:in `block in initialize'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:66:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:66:in `execute'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:40:in `run_callbacks'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:144:in `block (2 levels) in start'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:143:in `loop'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:143:in `block in start'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/plugins/clear_locks.rb:7:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/plugins/clear_locks.rb:7:in `block (2 levels) in <class:ClearLocks>'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:79:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:79:in `block (2 levels) in add'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:61:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:61:in `block in initialize'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:79:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:79:in `block in add'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:66:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:66:in `execute'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/lifecycle.rb:40:in `run_callbacks'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/worker.rb:142:in `start'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/command.rb:124:in `run'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/command.rb:112:in `block in run_process'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/daemons-1.1.9/lib/daemons/application.rb:255:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/daemons-1.1.9/lib/daemons/application.rb:255:in `block in start_proc'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/daemons-1.1.9/lib/daemons/daemonize.rb:82:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/daemons-1.1.9/lib/daemons/daemonize.rb:82:in `call_as_daemon'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/daemons-1.1.9/lib/daemons/application.rb:259:in `start_proc'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/daemons-1.1.9/lib/daemons/application.rb:296:in `start'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/daemons-1.1.9/lib/daemons/controller.rb:70:in `run'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/daemons-1.1.9/lib/daemons.rb:197:in `block in run_proc'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/daemons-1.1.9/lib/daemons/cmdline.rb:109:in `call'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/daemons-1.1.9/lib/daemons/cmdline.rb:109:in `catch_exceptions'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/daemons-1.1.9/lib/daemons.rb:196:in `run_proc'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/command.rb:110:in `run_process'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/command.rb:91:in `block in daemonize'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/command.rb:89:in `times'
  /home/ubuntu/.rvm/gems/ruby-2.1.0/gems/delayed_job-4.0.4/lib/delayed/command.rb:89:in `daemonize'
  bin/delayed_job:5:in `<main>'

-------------------------------
Data:
-------------------------------

  * data: {}

Answer 1

这似乎是Delayed Job 中的功能限制。错误未正确报告。跟踪和错误消息完全不正确。

我通过查看 rails 生产日志来调试我的。很难找到，因为在将任务添加到延迟作业时没有错误，即我在日志中得到一个 [INFO] 标签而不是 [ERROR]。

我希望有人指出如何在延迟作业失败的情况下获得正确且有意义的堆栈跟踪。

作为脚注，我的错误是一个真正具体的（和蹩脚的）。我在/config/environments/production.rb 中的 smtp 设置与我的邮件程序不兼容，所以我只在生产中收到此错误。