psql: error: connection to server at "172.16.9.33", port 5001 failed

[algoritmsystems]

cann't connect to 5001 port remotely:

psql -h 172.16.9.33 -p 5001 -U postgres -d mydb
psql: error: connection to server at "172.16.9.33", port 5001 failed: server closed the connection unexpectedly
        This probably means the server terminated abnormally
        before or while processing the request.

curl http://172.16.9.30:8008/replica?lag=100MB&tag_datacenter=db-2
[1] 150559
root@ansible:/home/administrator# {"state": "running", "postmaster_start_time": "2024-12-11 06:56:19.133868+05:00", "role": "primary", "server_version": 170002, "xlog": {"location": 1677889372160}, "timeline": 5, "replication": [{"usename": "replicator", "application_name": "db-3", "client_addr": "172.16.9.32", "state": "streaming", "sync_state": "async", "sync_priority": 0}, {"usename": "replicator", "application_name": "db-2", "client_addr": "172.16.9.31", "state": "streaming", "sync_state": "async", "sync_priority": 0}], "dcs_last_seen": 1733927378, "tags": {"datacenter": "db-1"}, "database_system_identifier": "7446320060672743578", "patroni": {"version": "4.0.4", "scope": "postgres-cluster", "name": "db-1"}}
[1]+  Done                    curl http://172.16.9.30:8008/replica?lag=100MB

curl http://172.16.9.31:8008/replica?lag=100MB&tag_datacenter=db-2
[1] 150560
root@ansible:/home/administrator# {"state": "running", "postmaster_start_time": "2024-12-11 09:25:19.389569+05:00", "role": "replica", "server_version": 170002, "xlog": {"received_location": 1677889372160, "replayed_location": 1677889372160, "replayed_timestamp": "2024-12-11 17:26:03.718353+05:00", "paused": false}, "timeline": 5, "replication_state": "streaming", "dcs_last_seen": 1733927390, "tags": {"datacenter": "db-2"}, "database_system_identifier": "7446320060672743578", "patroni": {"version": "4.0.4", "scope": "postgres-cluster", "name": "db-2"}}
[1]+  Done                    curl http://172.16.9.31:8008/replica?lag=100MB

curl http://172.16.9.32:8008/replica?lag=100MB&tag_datacenter=db-2
[1] 150561
root@ansible:/home/administrator# {"state": "running", "postmaster_start_time": "2024-12-11 06:11:03.515908+05:00", "role": "replica", "server_version": 170002, "xlog": {"received_location": 1677889372160, "replayed_location": 1677889372160, "replayed_timestamp": "2024-12-11 17:26:03.718353+05:00", "paused": false}, "timeline": 5, "replication_state": "streaming", "dcs_last_seen": 1733927390, "tags": {"datacenter": "db-3"}, "database_system_identifier": "7446320060672743578", "patroni": {"version": "4.0.4", "scope": "postgres-cluster", "name": "db-3"}}
[1]+  Done                    curl http://172.16.9.32:8008/replica?lag=100MB

ss -ntlp | grep 6432
LISTEN 0      4096         0.0.0.0:6432      0.0.0.0:*    users:(("pgbouncer",pid=1625,fd=7))                      
LISTEN 0      4096         0.0.0.0:6432      0.0.0.0:*    users:(("pgbouncer",pid=1626,fd=7))                      
LISTEN 0      4096         0.0.0.0:6432      0.0.0.0:*    users:(("pgbouncer",pid=1623,fd=7))                      
LISTEN 0      4096         0.0.0.0:6432      0.0.0.0:*    users:(("pgbouncer",pid=1621,fd=7)) 

 psql -h 172.16.9.31 -p 5432 -U postgres -d mydb
Password for user postgres: 

psql -h 172.16.9.31 -p 6432 -U postgres -d mydb
Password for user postgres: 

I have

pgbouncer_processes: 4
pgbouncer_default_pool_mode: "transaction"

Connections to the 5000, 5432, 6432 port are working, but to 5001 no connection!
PostgreSQL version 17.2

Is it due to any misconfiguration?

[KernelPanik7]

check haproxy logs, that's the service listening to port 5001

[algoritmsystems]

Solved by commenting # balancer_tags="datacenter=db in the inventory