[pgpool-general: 7643] empty replication_state and replication_sync_state in SHOW POOL_NODES

[Francesco Mazzi]

Hello, replication is working, if I execute "select * from pg_stat_replication;" on master node I see state and sync_state, but with SHOW POOL_NODES, replication_state and replication_sync_state are empty. 
I set the backend_application_name for every node in pgpool.conf, which could be the issue? 
This is pgpool.conf backend settings: 

# - Backend Connection Settings - 

backend_hostname0 = 'vm-lxpgresc1' 
# Host name or IP address to connect to for backend 0 
backend_port0 = 5432 
# Port number for backend 0 
backend_weight0 = 1 
# Weight for backend 0 (only in load balancing mode) 
backend_data_directory0 = '/var/lib/pgsql/12/data' 
# Data directory for backend 0 
backend_flag0 = 'ALLOW_TO_FAILOVER' 
# Controls various backend behavior 
# ALLOW_TO_FAILOVER, DISALLOW_TO_FAILOVER 
# or ALWAYS_PRIMARY 
backend_application_name0 = 'vm-lxpgresc1' 
# walsender's application_name, used for "show pool_nodes" command 


backend_hostname1 = 'vm-lxpgresc2' 
# Host name or IP address to connect to for backend 0 
backend_port1 = 5432 
# Port number for backend 0 
backend_weight1 = 1 
# Weight for backend 0 (only in load balancing mode) 
backend_data_directory1 = '/var/lib/pgsql/12/data' 
# Data directory for backend 0 
backend_flag1 = 'ALLOW_TO_FAILOVER' 
# Controls various backend behavior 
# ALLOW_TO_FAILOVER, DISALLOW_TO_FAILOVER 
# or ALWAYS_PRIMARY 
backend_application_name1 = 'vm-lxpgresc2' 
# walsender's application_name, used for "show pool_nodes" command 

backend_hostname2 = 'vm-lxpgresc3' 
# Host name or IP address to connect to for backend 0 
backend_port2 = 5432 
# Port number for backend 0 
backend_weight2 = 1 
# Weight for backend 0 (only in load balancing mode) 
backend_data_directory2 = '/var/lib/pgsql/12/data' 
# Data directory for backend 0 
backend_flag2 = 'ALLOW_TO_FAILOVER' 
# Controls various backend behavior 
# ALLOW_TO_FAILOVER, DISALLOW_TO_FAILOVER 
# or ALWAYS_PRIMARY 
backend_application_name2 = 'vm-lxpgresc3' 
# walsender's application_name, used for "show pool_nodes" command 

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