The updateJMXTimeout parameter sets the timeout value for JMX commands. This modifies the coregroup.xml file in <ND_install_root>/config/cells/<cell_name>/coregroups/DefaultCoreGroup directory.
[root@wpfsample3 bin]# ./wpfadmin updateJMXTimeout 40 WASX7209I: Connected to process "Deployment Manager" on node wpfsample3Manager using SOAP connector; The type of process is: DeploymentManager The JMX timeout value for the core group has been set to 40 seconds