title: delayed_job dies with out error -- leaving job in locked state
body: <p>After DJ dies the log files indicate nothing.</p>
  
  <p>running: <code>./script/delayed_job status</code></p>
  
  <p>gives: <code>pid-file for killed process 1143 found (/appPath/tmp/pids/delayed_job.pid), deleting.</code>
  <code>delayed_job: no instances running</code></p>
  
  <p>The strange thing is if I use: <code>./script/delayed_job run</code> It will run perfectly in the foreground! And never dies.</p>
  
  <p>Tried many versions of <code>delayed_job</code> and <code>mongoid</code> with same results.</p>
  
  <p>Any one know how to debug?</p>
  
  <p>Using:</p>
  
  <p><code>rails (3.2.7)</code></p>
  
  <p><code>delayed_job_mongoid (2.0.0)</code></p>
  
  <p><code>mongoid (3.0.3)</code></p>
  
  <p><code>delayed_job (3.0.3)</code></p>