Cloning and replication slots

replication slot: FAILED lock was still there containing the supposedly PID that ran before the

Replication slots are used to safeguard against the premature deletion of WAL segments before they have been applied by the standby server, thus

replication slot already exists In this case the slot is called pg_basebackup_N where N is the PID of the backend process running the replication connection However there

replication slot does not exist active_pid : The PID of the WAL sender process that is using this slot, if active xmin : The oldest transaction ID that this slot needs to retain