PMM3 postgres on Read only => pg_custom_replication_wal pq: recovery is in progress

Percona Monitoring and Management (PMM) PMM 3.x
1

Since the last version, our syslog is being spammed on read only postgres slaves:

Jul 15 10:15:59 pmm-agent[2743907]: time=“2025-07-15T10:15:59.975+01:00” level=error msg=“ts=2025-07-15T09:15:59.974Z caller=server.go:132 level=error namespace=pg_custom_replication_wal msg="Error running query on database \"xx:5432\": pg_custom_replication_wal pq: recovery is in progress"” agentID=xxx-e4ec-4baa-8c05-0c24573f62b9 component=agent-process type=postgres_exporter
Jul 15 10:15:59 pmm-agent[2743907]: time=“2025-07-15T10:15:59.975+01:00” level=error msg=“ts=2025-07-15T09:15:59.974Z caller=postgres_exporter.go:770 level=error err="queryNamespaceMappings returned 1 errors"” agentID=xxx-e4ec-4baa-8c05-0c24573f62b9 component=agent-process type=postgres_exporter

2

@bart.schelstraete It looks like you are running some custom metric collector:- pg_custom_replication_wal, which is unable to perform operations on read-only replicas. Do you have the details on what exactly the custom metrics are trying to get or execute?

If I am correct, you are not seeing these messages in the Primary. Right?