hadoop - 来自 Ambari 的 HAWQ 服务检查失败

Question

我们有小型 Hadoop-Hawq 集群。在那，当我执行HAWQ服务的检查时，从属主机服务失败。

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')

如有任何帮助，我们将不胜感激？

Answer 1

HAWQ 需要对所有集群节点进行无密码 ssh 访问。检查系统是否配置为允许这样做，并执行以下 hawq 命令以在主机文件中定义的节点上设置无密码 ssh:

$ gpssh-exkeys -f hostfile (in version 1.x)

$ hawq ssh-exkeys -f hostfile (in version 2.x)