Using Pgpool II 2.3.1, I am facing problem.

When I execute pcp_recovery_node , it shows pgpool_recovery missint function at postgresql log.
But if I execute
select pgpool_recovery('copy_base_backup','','/usr/local/psql/data5434');

it works fine.

Could anyone please tell me what the prpblem might be?

I want to add here that replication and online recovery was successfully running on pgpool II 2.2.5.

Moreover, in Pgpool II 2.3.1, it does not get nodes, while the nodes are running.