To Start the Node Agent

A node agent is a lightweight process running on each machine that participates in an Application Server administrative domain. The node agent is responsible for starting and stopping server instances on the host. It also communicates with the Domain Administration Server to create new Application Server instances.

You can use node agents only on domains with the cluster or enterprise profile. If you are running only a developer domain, you need to create a domain with cluster profile before you can create and use node agents. For information on creating domains, type asadmin create-domain --help or see create-domain(1) in the Sun Java System Application Server 9.1 Reference Manual

One node agent is needed on a machine for each Application Server administrative domain that the machine belongs to. If you are using Sun Java System Application Server 9.1 (Enterprise bundle), choose the Node Agent Component during installation and a default node agent called hostname is created. If you have installed Glassfish, the node agent is not automatically created. To create a node agent, follow the instructions in To Create a Node Agent in Sun Java System Application Server 9.1 High Availability Administration Guide.

1. In a terminal window, type this command:

   asadmin start-node-agent nodeagentname

   Replace the variable nodeagentname with the name of the node agent you created. If you want to use the default node agent, which is created by Sun Java System Application Server 9.1, replace the nodeagentname with the name of the host on which Application Server is running. If your default domain on port 4848 (domain1) is not running on cluster or enterprise profile, use the --port option to specify the port of the cluster or enterprise domain.

2. When you are prompted, provide the master password.

   The node agent starts and connects with the Domain Administration Server.

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   Note –

   Ensure that the Domain Administration Server is running before you start the node agent. Check the server.log file of a cluster instance to identify problems related to starting node agents or cluster instances.

   If you have problems while starting a node agent or a cluster on Windows, see the Sun Java System Application Server 9.1 Release Notes for possible solutions to the problem.

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   After the node agent has been started once, you can view it in the Admin Console.

Next Steps

In this section you started the Domain Administration Server and confirmed that it is running. You also logged in to the Admin Console and used the Log Viewer. You started the node agent. You can stop the Quick Start trail here if you do not wish to continue, or you can go on to the next section.