Postgresql 11 logical replication - stuck in `catchup` state

Streaming Replication Protocol error_ replication slot is active for pid The other application using the same configuration will show the following error message: replication slot slot_name is already active for PID x error_ replication slot is active for pid Query on the primary instance is always running After creating a replica, the query SELECT * from pg_stat_activity where state = 'active' and pid = XXXX and

error 1089 ereport(ERROR, (errcode, errmsg(replication slot %s is active for PID %d, NameStr, active_pid))); } else if