STANDBY State ADMIN State

Understanding Server Life Cycle 5-7

5.3.3 STANDBY State

A server instance in STANDBY does not process any request—its regular listen port is closed. The administration port is open, and accepts life cycle commands that transition the server instance to either the RUNNING or the SHUTDOWN state. Other Administration requests are not accepted. Starting a server instance in standby is a method of keeping it available as a hot backup, a useful capability in high-availability environments. The only life cycle command that causes a server instance to enter the STANDBY state and remain in that state is the Start in Standby command. A server instance transitions through the STANDBY state when you issue a Start or a Start in Admin command.

5.3.4 ADMIN State

In the ADMIN state, WebLogic Server is up and running, but available only for administration operations, allowing you to perform server and application-level administration tasks. When a server instance is in the ADMIN state: ■ The Administration Console is available. ■ The server instance accepts requests from users with the admin role. Requests from non-admin users are refused. ■ Applications are activated in the application ADMIN state. They accept requests from users with the admin and AppTester roles. Users with these roles, accessing an application in the application ADMIN state, have access to all application functionality, not just administrative functions. ■ The JDBC, JMS, and JTA subsystems are active, and administrative operations can be performed upon them. However, you do not have to have administrator-level privileges to access these subsystems when the server is in the ADMIN state. ■ Deployments or re-deployments are allowed, and take effect when you transition the server instance from the ADMIN to the RUNNING state using the Resume command. ■ ClusterService is active and listens for heartbeats and announcements from other cluster members. It can detect that other Managed Servers have joined the cluster, but is invisible to other cluster members. You can transition a server instance to the ADMIN state using the Start in Admin, Suspend, or Force Suspend commands. A server instance transitions through the ADMIN state as a result of Start, Shutdown, and Force Shutdown commands. You can transition a server instance in the ADMIN state to RUNNING with the Resume command, or to SHUTDOWN, with the Shutdown or Force Shutdown command.

5.3.5 RESUMING State