title: HAWQ service check Fails From Ambari
body: <p>We have small Hadoop-Hawq Cluster. In that, once of slave host service fails When I am executing the check of HAWQ services.</p>
  
  <p>Getting following error From Ambari UI:</p>
  
  <pre><code>**stderr:** 
  Traceback (most recent call last):
    File "/var/lib/ambari-agent/cache/stacks/PHD/3.0/services/HAWQ/package/scripts/service_check.py", line 9, in &lt;module&gt;
      HAWQServiceCheck().execute()
    File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 123, in execute
      method(env)
    File "/var/lib/ambari-agent/cache/stacks/PHD/3.0/services/HAWQ/package/scripts/service_check.py", line 6, in service_check
      hawq.verify_segments_state(env)
    File "/var/lib/ambari-agent/cache/stacks/PHD/3.0/services/HAWQ/package/scripts/hawq.py", line 20, in verify_segments_state
      raise Exception("gpstate command returned non-zero result: {0}. Out: {1} Error: {2}".format(retcode, out, err))
  Exception: gpstate command returned non-zero result: 255. Out:  Error: Permission denied, please try again.
  Permission denied, please try again.
  Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
   **stdout:**
  (255, '', 'Permission denied, please try again.\r\nPermission denied, please try again.\r\nPermission denied (publickey,gssapi-keyex,gssapi-with-mic,password).\r\n')
  </code></pre>
  
  <p>Any help on it would be much appreciated ?</p>