After finish modify pg_hba. Conf file, execute gpstop -u failure
[gpadmin @ ts - gpseg greenplum - 1-1] $gpstop -u
20190830:02:09:05:029460 gpstop: ts - greenplum - 1: gpadmin - [INFO] : - Starting gpstop with args: -u
20190830:02:09:05:029460 gpstop: ts - greenplum - 1: gpadmin - [INFO] : - Gathering information and validating the environment...
20190830:02:09:05:029460 gpstop: ts - greenplum - 1: gpadmin - [INFO] : - Obtaining greenplum Master catalog information
20190830:02:09:05:029460 gpstop: ts - greenplum - 1: gpadmin - [INFO] : - Obtaining Segment the details from the master...
20190830:02:09:05:029460 gpstop: ts - greenplum - 1: gpadmin - [CRITICAL] : - gpstop failed. (='fe_sendauth: no Reason password supplied
') exiting...

Pg_hba.conf configuration is as follows:

# IPv4 local connections:
# host all all 0.0.0.0/0 trust
# IPv6 local connections:
The local all gpadmin ident
The host all gpadmin 127.0.0.1/28 trust
The host all gpadmin 10.27.10.155/32 trust
The host all gpadmin: : 1/128 trust
The host all gpadmin fe80: : 32 f6: b4fd: d767:7303/128 trust
The local replication gpadmin ident
The host replication gpadmin samenet trust
The local all all trust
The host all isdbuser 0.0.0.0/0 md5
Please help have a look at the great god, thank ~