WAL Sender Status status is not streaming in master standby

[Do dy]

we try to started and resynchronized with gpinitstandby -n , the status is

• [INFO]:-Starting standby master
• [INFO]:-Checking if standby master is running on host: -STANDBY in directory: /data/master/dg-1
• [INFO]:-Successfully started standby master

but when we cek status stanby master with gpstate -f, the status is 

• [INFO]:-Starting gpstate with args:
• [INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 5.29.12 build
• [INFO]:-master Greenplum Version: 'PostgreSQL 8.3.23
• [INFO]:-Obtaining Segment details from master..
• [INFO]:-Standby master details-[INFO]:-----------------------
• [INFO]:- Standby address = -STANDBY
• [INFO]:- Standby data directory = /data/master/dg-1
• [INFO]:- Standby port = 5432
• [INFO]:- Standby PID = 96212
• [INFO]:- Standby status = Standby host passive
• [INFO]:--------------------------------------------------------------
• [INFO]:--pg_stat_replication
• [INFO]:--------------------------------------------------------------
• [INFO]:-No entries found.

where the WAL Sender Status status is not streaming the same as before