It seems CentOS6/7 recognizes "localhost" as IPv6 ::1.
2018-09-08 17:04:06: pid 21508: DETAIL: no pg_hba.conf entry for host "::1", user "postgres", database "postgres", SSL on
So add following line to pg_hba.conf.
host all all ::1/128 trust
Let's see if buildfarm still complains.
# connectins is being established is, look into the debug log.
echo "log_min_messages = debug5" >> etc/pgpool.conf
+# allow to access IPv6 localhost
+echo "host all all ::1/128 trust" >> data0/pg_hba.conf
+
source ./bashrc.ports
./startall