title: Cloud Dataflow job stuck in endless loop before starting(create is succeded)
body: <p>I have a Cloud Dataflow job that's stuck in the initiation phase, before running any application logic. I tested this by adding a log output statement inside inside the processElement step, but it's not appearing in the logs so it seems it's not being reached.</p>
  
  <p>All I can see in the logs are the following messages, this which appears every minute:</p>
  
  <p>Error: Could not find or load main class com.google.cloud.dataflow.sdk.runners.worker.DataflowWorkerHarness</p>
  
  <p>And these which loop every few seconds:</p>
  
  <p>VM is healthy? true.</p>
  
  <p>http: TLS handshake error from 172.17.0.1:38335: EOF</p>
  
  <p>Job is in state JOB_STATE_RUNNING, will check again in 30 seconds.</p>
  
  <p>The job ID is 2015-10-05_04_05_33-3751772463116380333</p>
  
  <p>Any ideas on what might be causing this?</p>