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Jan 14 10:04:57 dayrhegrdp005 postgres[25223]: [4559-1] LOG:  00000: statem=
ent: PREPARE pgpool19528 AS SELECT count(*) from (SELECT has_function_privi=
lege('measure',
Jan 14 10:04:57 dayrhegrdp005 postgres[25223]: [4559-2]  'pgpool_regclass(c=
string)', 'execute') WHERE EXISTS(SELECT * FROM pg_catalog.pg_proc AS p WHE=
RE p.proname =3D 'pgpool_regclass'))
Jan 14 10:04:57 dayrhegrdp005 postgres[25223]: [4559-3]  AS s
Jan 14 10:04:57 dayrhegrdp005 postgres[25223]: [4559-4] LOCATION:  exec_par=
se_message, postgres.c:1159
Jan 14 10:04:57 dayrhegrdp005 postgres[25223]: [4560-1] LOG:  00000: statem=
ent: <BIND> pgpool19528
Jan 14 10:04:57 dayrhegrdp005 postgres[25223]: [4560-2] LOCATION:  exec_bin=
d_message, postgres.c:1460
Jan 14 10:04:57 dayrhegrdp005 postgres[25223]: [4561-1] ERROR:  34000: port=
al "pgpool19528" does not exist
Jan 14 10:04:57 dayrhegrdp005 postgres[25223]: [4561-2] LOCATION:  exec_exe=
cute_message, postgres.c:1669

The versions:
pgpool v3.3.2  compiled 1/10/2014

PostgreSQL 8.1.23 on x86_64-redhat-linux-gnu, compiled by GCC gcc (GCC) 4.1=
.2 20080704 (Red Hat 4.1.2-51)

I had found similar errors via google, but nothing quite exactly like this.

Please let me know what other information I can provide?