gp数据库添加standby，通过gpinitstandby -s node01指令。
输入指令报错 
[gpadmin@node03 ~]$ gpinitstandby -s node01 20191205:20:55:32:374084 gpinitstandby:node03:gpadmin-[ERROR]:-Failed to retrieve configuration information from the master. 20191205:20:55:32:374084 gpinitstandby:node03:gpadmin-[ERROR]:-Failed to create standby 20191205:20:55:32:374084 gpinitstandby:node03:gpadmin-[ERROR]:-Error initializing standby master: could not connect to server: Connection refused Is the server running on host "localhost" (::1) and accepting TCP/IP connections on port 5432? could not connect to server: Connection refused Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432? 显示拒绝连接，防火墙已经关闭，不知道是哪个地方配置不对。希望大家能给我一些建议，谢谢了！！！
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