About read-only transaction in PostgresXL

See more:

PostgreSQL

Hello, my PostgresXL version 9.2.0

(1)
After I started the GTM, DataNode, Coordinator, as well as the coordinator of each datanode postgresql.conf archive

#default_read_only_transaction = "off" modified default_read_only_transaction = "off"

(2)
Use the following instructions to connect information nodes:

psql -h 192.168.20.138 -p 25431 -U postgres

192.168.20.138 is the first data node ip location.

25431 is the first data node postgresql.conf set port settings.

postgres is installed PostgresXL system account, also a super manager of this PostgresXL.

(3)
Establish a database using the following command:

create database "MyTest";

The following error message has appeared:

can not execute CREATE DATABASE "MyTest" in a read-only transaction.

How can I be able to cancel the read-only transaction of this restriction?

THX.