我们有一个小的hadoop hawq集群。其中，在执行hawq服务的检查时，有一次从主机服务失败。
从ambari ui获取以下错误：

**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 <module>
    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')

如果您能帮上忙，我们将不胜感激？