Pivotal Greenplum指挥中心没有回复

Question

当我尝试使用网络浏览器访问greenplum命令中心时。

我收到错误：

[gpadmin@mdw ~]$ psql -h hostname -p 28080 - U gpmon
psql: warning: extra command-line argument "gpmon" ignored
psql: could not connect to server: Connection refused
        Is the server running on host "hostname" (IP) and accepting
        TCP/IP connections on port 28080?

为什么gcc会崩溃？

同时检查

[gpadmin@mdw~]$ ps ax | grep gpcmdr
 1578 pts/1    S+     0:00 grep gpcmdr

**Verified the data collection process is running on the Greenplum master** 
[gpadmin@mdw ~]$ ps -ef | grep gpmmon
gpadmin   1659 23646  0 13:53 pts/1    00:00:00 grep gpmmon


[gpadmin@mdw ~]$ gpcmdr --start
Starting instance gpcc...
Greenplum Command Center UI for instance 'gpcc' - [RUNNING on PORT:  28080]
[gpadmin@mdw ~]$

非常感谢任何帮助。