asadmin --host localhost --port 4848 --user admin --interactive=false --echo=true --terse=false create-cluster cl1

Command create-cluster executed successfully.

asadmin --host localhost --port 4848 --user admin --interactive=false --echo=true --terse=false create-cluster --config cl1-config cl2

Command create-cluster executed successfully.

asadmin --host localhost --port 4848 --user admin --interactive=false --echo=true --terse=false create-cluster cl1
Command create-cluster failed.
org.glassfish.api.admin.CommandException: remote failure: Exception while adding the new configuration org.jvnet.hk2.config.TransactionFailure: A Cluster instance with a "cl1" name already exist in the configuration : org.jvnet.hk2.config.TransactionFailure: A Cluster instance with a "cl1" name already exist in the configuration
asadmin --host localhost --port 4848 --user admin --interactive=false --echo=true --terse=false create-cluster --config junk-config cl3
Command create-cluster failed.